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-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label18_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:05:51,956 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:05:51,958 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:05:51,972 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:05:51,973 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:05:51,974 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:05:51,975 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:05:51,977 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:05:51,978 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:05:51,979 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:05:51,980 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:05:51,980 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:05:51,981 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:05:51,982 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:05:51,983 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:05:51,984 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:05:51,985 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:05:51,988 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:05:51,990 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:05:51,996 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:05:51,998 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:05:51,999 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:05:52,001 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:05:52,001 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:05:52,005 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:05:52,006 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:05:52,007 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:05:52,007 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:05:52,009 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:05:52,011 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:05:52,011 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:05:52,012 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-07 18:05:52,014 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-LIM.epf [2018-11-07 18:05:52,029 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:05:52,030 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:05:52,031 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:05:52,031 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:05:52,031 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:05:52,031 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:05:52,031 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:05:52,032 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:05:52,032 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:05:52,032 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:05:52,032 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:05:52,032 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:05:52,032 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:05:52,033 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:05:52,033 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:05:52,034 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:05:52,034 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:05:52,034 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:05:52,034 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:05:52,034 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:05:52,035 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:05:52,036 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:05:52,036 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:05:52,036 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:05:52,036 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:05:52,036 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:05:52,037 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:05:52,037 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:05:52,037 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:05:52,037 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:05:52,037 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:05:52,038 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:05:52,038 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:05:52,038 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:05:52,038 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:05:52,088 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:05:52,100 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:05:52,103 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:05:52,105 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:05:52,105 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:05:52,106 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label18_false-unreach-call_false-termination.c [2018-11-07 18:05:52,163 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07a5f4385/552cd483c0474ea5af47a03de3b96437/FLAG88d2e4e71 [2018-11-07 18:05:52,912 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:05:52,913 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label18_false-unreach-call_false-termination.c [2018-11-07 18:05:52,936 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07a5f4385/552cd483c0474ea5af47a03de3b96437/FLAG88d2e4e71 [2018-11-07 18:05:52,957 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07a5f4385/552cd483c0474ea5af47a03de3b96437 [2018-11-07 18:05:52,969 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:05:52,971 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:05:52,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:05:52,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:05:52,977 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:05:52,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:05:52" (1/1) ... [2018-11-07 18:05:52,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56927dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:52, skipping insertion in model container [2018-11-07 18:05:52,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:05:52" (1/1) ... [2018-11-07 18:05:52,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:05:53,090 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:05:53,927 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:05:53,933 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:05:54,213 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:05:54,237 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:05:54,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:54 WrapperNode [2018-11-07 18:05:54,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:05:54,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:05:54,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:05:54,240 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:05:54,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:54" (1/1) ... [2018-11-07 18:05:54,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:54" (1/1) ... [2018-11-07 18:05:54,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:05:54,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:05:54,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:05:54,463 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:05:54,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:54" (1/1) ... [2018-11-07 18:05:54,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:54" (1/1) ... [2018-11-07 18:05:54,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:54" (1/1) ... [2018-11-07 18:05:54,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:54" (1/1) ... [2018-11-07 18:05:54,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:54" (1/1) ... [2018-11-07 18:05:54,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:54" (1/1) ... [2018-11-07 18:05:54,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:54" (1/1) ... [2018-11-07 18:05:54,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:05:54,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:05:54,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:05:54,630 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:05:54,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:54" (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 18:05:54,707 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:05:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:05:54,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:05:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 18:05:54,708 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 18:05:54,708 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:05:54,709 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:05:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:05:54,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:05:54,709 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:05:54,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:06:00,397 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:06:00,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:06:00 BoogieIcfgContainer [2018-11-07 18:06:00,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:06:00,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:06:00,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:06:00,405 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:06:00,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:05:52" (1/3) ... [2018-11-07 18:06:00,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e418016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:06:00, skipping insertion in model container [2018-11-07 18:06:00,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:05:54" (2/3) ... [2018-11-07 18:06:00,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e418016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:06:00, skipping insertion in model container [2018-11-07 18:06:00,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:06:00" (3/3) ... [2018-11-07 18:06:00,409 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label18_false-unreach-call_false-termination.c [2018-11-07 18:06:00,420 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:06:00,429 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:06:00,445 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:06:00,489 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:06:00,489 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:06:00,489 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:06:00,490 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:06:00,490 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:06:00,490 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:06:00,490 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:06:00,490 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:06:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-11-07 18:06:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-07 18:06:00,537 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:00,539 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:00,543 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:00,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:00,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1622466265, now seen corresponding path program 1 times [2018-11-07 18:06:00,551 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:00,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:00,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:00,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:00,603 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:00,998 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 18:06:01,004 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:06:01,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:06:01,005 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:01,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:06:01,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:06:01,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:06:01,039 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-11-07 18:06:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:07,293 INFO L93 Difference]: Finished difference Result 1514 states and 2777 transitions. [2018-11-07 18:06:07,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:06:07,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-11-07 18:06:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:07,326 INFO L225 Difference]: With dead ends: 1514 [2018-11-07 18:06:07,326 INFO L226 Difference]: Without dead ends: 1070 [2018-11-07 18:06:07,337 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:06:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-11-07 18:06:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1068. [2018-11-07 18:06:07,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-11-07 18:06:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1675 transitions. [2018-11-07 18:06:07,465 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1675 transitions. Word has length 15 [2018-11-07 18:06:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:07,466 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 1675 transitions. [2018-11-07 18:06:07,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:06:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1675 transitions. [2018-11-07 18:06:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-07 18:06:07,471 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:07,471 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 18:06:07,471 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:07,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:07,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1644253011, now seen corresponding path program 1 times [2018-11-07 18:06:07,472 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:07,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:07,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:07,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:07,474 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:06:07,761 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:06:07,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:06:07,762 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:07,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:06:07,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:06:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:06:07,766 INFO L87 Difference]: Start difference. First operand 1068 states and 1675 transitions. Second operand 3 states. [2018-11-07 18:06:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:11,825 INFO L93 Difference]: Finished difference Result 3059 states and 4890 transitions. [2018-11-07 18:06:11,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:06:11,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2018-11-07 18:06:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:11,842 INFO L225 Difference]: With dead ends: 3059 [2018-11-07 18:06:11,843 INFO L226 Difference]: Without dead ends: 1997 [2018-11-07 18:06:11,851 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:06:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2018-11-07 18:06:11,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1995. [2018-11-07 18:06:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1995 states. [2018-11-07 18:06:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 2748 transitions. [2018-11-07 18:06:11,935 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 2748 transitions. Word has length 85 [2018-11-07 18:06:11,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:11,936 INFO L480 AbstractCegarLoop]: Abstraction has 1995 states and 2748 transitions. [2018-11-07 18:06:11,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:06:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 2748 transitions. [2018-11-07 18:06:11,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-11-07 18:06:11,946 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:11,947 INFO L375 BasicCegarLoop]: trace histogram [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, 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 18:06:11,947 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:11,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:11,948 INFO L82 PathProgramCache]: Analyzing trace with hash -76739898, now seen corresponding path program 1 times [2018-11-07 18:06:11,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:11,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:11,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:11,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:11,949 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 17 proven. 77 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 18:06:12,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:12,343 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:12,344 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 196 with the following transitions: [2018-11-07 18:06:12,346 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:06:12,415 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:12,415 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:12,884 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:14,886 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:06:14,888 INFO L272 AbstractInterpreter]: Visited 104 different actions 692 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:06:14,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:14,933 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:06:15,876 INFO L227 lantSequenceWeakener]: Weakened 38 states. On average, predicates are now at 77.51% of their original sizes. [2018-11-07 18:06:15,877 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:06:20,885 INFO L415 sIntCurrentIteration]: We unified 194 AI predicates to 194 [2018-11-07 18:06:20,885 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:06:20,886 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:06:20,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 23 [2018-11-07 18:06:20,887 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:20,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-07 18:06:20,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-07 18:06:20,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:06:20,889 INFO L87 Difference]: Start difference. First operand 1995 states and 2748 transitions. Second operand 19 states. [2018-11-07 18:07:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:26,348 INFO L93 Difference]: Finished difference Result 6523 states and 8452 transitions. [2018-11-07 18:07:26,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-07 18:07:26,348 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-11-07 18:07:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:26,372 INFO L225 Difference]: With dead ends: 6523 [2018-11-07 18:07:26,372 INFO L226 Difference]: Without dead ends: 4534 [2018-11-07 18:07:26,383 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 211 GetRequests, 121 SyntacticMatches, 57 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2018-11-07 18:07:26,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2018-11-07 18:07:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 3811. [2018-11-07 18:07:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3811 states. [2018-11-07 18:07:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 4633 transitions. [2018-11-07 18:07:26,488 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 4633 transitions. Word has length 195 [2018-11-07 18:07:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:26,490 INFO L480 AbstractCegarLoop]: Abstraction has 3811 states and 4633 transitions. [2018-11-07 18:07:26,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-07 18:07:26,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 4633 transitions. [2018-11-07 18:07:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2018-11-07 18:07:26,502 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:26,503 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:26,504 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:26,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:26,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1749750815, now seen corresponding path program 1 times [2018-11-07 18:07:26,504 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:26,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:26,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:26,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:26,506 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-07 18:07:26,887 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:07:26,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:07:26,888 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:07:26,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:07:26,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:07:26,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:07:26,889 INFO L87 Difference]: Start difference. First operand 3811 states and 4633 transitions. Second operand 3 states. [2018-11-07 18:07:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:28,991 INFO L93 Difference]: Finished difference Result 6730 states and 8953 transitions. [2018-11-07 18:07:28,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:07:28,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 371 [2018-11-07 18:07:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:29,018 INFO L225 Difference]: With dead ends: 6730 [2018-11-07 18:07:29,018 INFO L226 Difference]: Without dead ends: 4741 [2018-11-07 18:07:29,032 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:07:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4741 states. [2018-11-07 18:07:29,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4741 to 4741. [2018-11-07 18:07:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4741 states. [2018-11-07 18:07:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4741 states to 4741 states and 5719 transitions. [2018-11-07 18:07:29,139 INFO L78 Accepts]: Start accepts. Automaton has 4741 states and 5719 transitions. Word has length 371 [2018-11-07 18:07:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:29,140 INFO L480 AbstractCegarLoop]: Abstraction has 4741 states and 5719 transitions. [2018-11-07 18:07:29,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:07:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4741 states and 5719 transitions. [2018-11-07 18:07:29,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-11-07 18:07:29,149 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:29,150 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:29,150 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:29,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:29,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1636810859, now seen corresponding path program 1 times [2018-11-07 18:07:29,151 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:29,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:29,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:29,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:29,152 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:07:29,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:29,589 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:29,589 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 378 with the following transitions: [2018-11-07 18:07:29,590 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [633], [638], [640], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:07:29,603 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:29,603 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:29,759 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:29,989 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:07:29,989 INFO L272 AbstractInterpreter]: Visited 283 different actions 560 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:07:29,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:29,997 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:07:30,596 INFO L227 lantSequenceWeakener]: Weakened 26 states. On average, predicates are now at 78.13% of their original sizes. [2018-11-07 18:07:30,597 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:07:31,161 INFO L415 sIntCurrentIteration]: We unified 376 AI predicates to 376 [2018-11-07 18:07:31,162 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:07:31,162 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:07:31,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-11-07 18:07:31,162 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:07:31,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 18:07:31,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 18:07:31,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:07:31,165 INFO L87 Difference]: Start difference. First operand 4741 states and 5719 transitions. Second operand 20 states. [2018-11-07 18:08:20,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:08:20,445 INFO L93 Difference]: Finished difference Result 8891 states and 11006 transitions. [2018-11-07 18:08:20,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-07 18:08:20,446 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 377 [2018-11-07 18:08:20,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:08:20,469 INFO L225 Difference]: With dead ends: 8891 [2018-11-07 18:08:20,469 INFO L226 Difference]: Without dead ends: 5972 [2018-11-07 18:08:20,480 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 393 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2018-11-07 18:08:20,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2018-11-07 18:08:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 5965. [2018-11-07 18:08:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5965 states. [2018-11-07 18:08:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5965 states to 5965 states and 7036 transitions. [2018-11-07 18:08:20,603 INFO L78 Accepts]: Start accepts. Automaton has 5965 states and 7036 transitions. Word has length 377 [2018-11-07 18:08:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:08:20,604 INFO L480 AbstractCegarLoop]: Abstraction has 5965 states and 7036 transitions. [2018-11-07 18:08:20,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 18:08:20,605 INFO L276 IsEmpty]: Start isEmpty. Operand 5965 states and 7036 transitions. [2018-11-07 18:08:20,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2018-11-07 18:08:20,616 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:08:20,617 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:20,617 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:08:20,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1848856695, now seen corresponding path program 1 times [2018-11-07 18:08:20,618 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:08:20,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:20,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:08:20,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:20,619 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:08:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2018-11-07 18:08:22,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:08:22,128 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:08:22,128 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 445 with the following transitions: [2018-11-07 18:08:22,129 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [498], [506], [514], [522], [530], [538], [546], [554], [562], [566], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:08:22,134 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:08:22,135 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:08:22,182 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:08:22,998 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:08:22,999 INFO L272 AbstractInterpreter]: Visited 284 different actions 851 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:08:23,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:23,009 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:08:23,379 INFO L227 lantSequenceWeakener]: Weakened 441 states. On average, predicates are now at 79.95% of their original sizes. [2018-11-07 18:08:23,379 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:08:23,464 INFO L415 sIntCurrentIteration]: We unified 443 AI predicates to 443 [2018-11-07 18:08:23,464 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:08:23,465 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:08:23,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2018-11-07 18:08:23,465 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:08:23,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:08:23,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:08:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:08:23,466 INFO L87 Difference]: Start difference. First operand 5965 states and 7036 transitions. Second operand 10 states. [2018-11-07 18:08:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:08:31,886 INFO L93 Difference]: Finished difference Result 10465 states and 12860 transitions. [2018-11-07 18:08:31,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 18:08:31,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 444 [2018-11-07 18:08:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:08:31,917 INFO L225 Difference]: With dead ends: 10465 [2018-11-07 18:08:31,917 INFO L226 Difference]: Without dead ends: 7546 [2018-11-07 18:08:31,928 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 450 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2018-11-07 18:08:31,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7546 states. [2018-11-07 18:08:32,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7546 to 7536. [2018-11-07 18:08:32,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7536 states. [2018-11-07 18:08:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7536 states to 7536 states and 8735 transitions. [2018-11-07 18:08:32,077 INFO L78 Accepts]: Start accepts. Automaton has 7536 states and 8735 transitions. Word has length 444 [2018-11-07 18:08:32,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:08:32,078 INFO L480 AbstractCegarLoop]: Abstraction has 7536 states and 8735 transitions. [2018-11-07 18:08:32,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:08:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 7536 states and 8735 transitions. [2018-11-07 18:08:32,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2018-11-07 18:08:32,094 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:08:32,094 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:32,095 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:08:32,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:32,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1378188568, now seen corresponding path program 1 times [2018-11-07 18:08:32,095 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:08:32,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:32,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:08:32,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:32,096 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:08:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 18:08:32,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:08:32,904 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:08:32,904 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 486 with the following transitions: [2018-11-07 18:08:32,905 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [625], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:08:32,910 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:08:32,910 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:08:33,120 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:08:35,081 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:08:35,081 INFO L272 AbstractInterpreter]: Visited 285 different actions 1703 times. Merged at 8 different actions 51 times. Widened at 1 different actions 2 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:08:35,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:35,089 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:08:35,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:08:35,090 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 18:08:35,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:08:35,107 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:08:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:35,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:08:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 18:08:35,741 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:08:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 18:08:36,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:08:36,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-07 18:08:36,510 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:08:36,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:08:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:08:36,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:08:36,512 INFO L87 Difference]: Start difference. First operand 7536 states and 8735 transitions. Second operand 9 states. [2018-11-07 18:08:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:08:45,952 INFO L93 Difference]: Finished difference Result 16010 states and 20632 transitions. [2018-11-07 18:08:45,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-07 18:08:45,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 485 [2018-11-07 18:08:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:08:46,022 INFO L225 Difference]: With dead ends: 16010 [2018-11-07 18:08:46,023 INFO L226 Difference]: Without dead ends: 12144 [2018-11-07 18:08:46,067 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 977 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2018-11-07 18:08:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12144 states. [2018-11-07 18:08:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12144 to 11750. [2018-11-07 18:08:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11750 states. [2018-11-07 18:08:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11750 states to 11750 states and 13960 transitions. [2018-11-07 18:08:46,355 INFO L78 Accepts]: Start accepts. Automaton has 11750 states and 13960 transitions. Word has length 485 [2018-11-07 18:08:46,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:08:46,357 INFO L480 AbstractCegarLoop]: Abstraction has 11750 states and 13960 transitions. [2018-11-07 18:08:46,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:08:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 11750 states and 13960 transitions. [2018-11-07 18:08:46,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2018-11-07 18:08:46,379 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:08:46,380 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:46,380 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:08:46,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1443952746, now seen corresponding path program 1 times [2018-11-07 18:08:46,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:08:46,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:46,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:08:46,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:46,383 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:08:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-11-07 18:08:47,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:08:47,235 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:08:47,236 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 523 with the following transitions: [2018-11-07 18:08:47,236 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [962], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:08:47,244 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:08:47,244 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:08:47,318 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:08:48,485 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:08:48,485 INFO L272 AbstractInterpreter]: Visited 284 different actions 851 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:08:48,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:48,513 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:08:49,406 INFO L227 lantSequenceWeakener]: Weakened 519 states. On average, predicates are now at 83.23% of their original sizes. [2018-11-07 18:08:49,407 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:08:49,536 INFO L415 sIntCurrentIteration]: We unified 521 AI predicates to 521 [2018-11-07 18:08:49,536 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:08:49,536 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:08:49,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2018-11-07 18:08:49,537 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:08:49,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:08:49,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:08:49,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:08:49,539 INFO L87 Difference]: Start difference. First operand 11750 states and 13960 transitions. Second operand 10 states. [2018-11-07 18:08:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:08:59,078 INFO L93 Difference]: Finished difference Result 19933 states and 24626 transitions. [2018-11-07 18:08:59,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 18:08:59,078 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 522 [2018-11-07 18:08:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:08:59,118 INFO L225 Difference]: With dead ends: 19933 [2018-11-07 18:08:59,119 INFO L226 Difference]: Without dead ends: 13622 [2018-11-07 18:08:59,137 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 528 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2018-11-07 18:08:59,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2018-11-07 18:08:59,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 13270. [2018-11-07 18:08:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13270 states. [2018-11-07 18:08:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13270 states to 13270 states and 15613 transitions. [2018-11-07 18:08:59,372 INFO L78 Accepts]: Start accepts. Automaton has 13270 states and 15613 transitions. Word has length 522 [2018-11-07 18:08:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:08:59,373 INFO L480 AbstractCegarLoop]: Abstraction has 13270 states and 15613 transitions. [2018-11-07 18:08:59,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:08:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 13270 states and 15613 transitions. [2018-11-07 18:08:59,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-11-07 18:08:59,393 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:08:59,394 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:59,394 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:08:59,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:59,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1799340992, now seen corresponding path program 1 times [2018-11-07 18:08:59,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:08:59,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:59,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:08:59,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:59,396 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:08:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-07 18:08:59,826 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:08:59,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:08:59,826 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:08:59,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:08:59,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:08:59,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:08:59,828 INFO L87 Difference]: Start difference. First operand 13270 states and 15613 transitions. Second operand 3 states. [2018-11-07 18:09:04,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:09:04,471 INFO L93 Difference]: Finished difference Result 19886 states and 24450 transitions. [2018-11-07 18:09:04,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:09:04,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 531 [2018-11-07 18:09:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:09:04,509 INFO L225 Difference]: With dead ends: 19886 [2018-11-07 18:09:04,509 INFO L226 Difference]: Without dead ends: 13577 [2018-11-07 18:09:04,525 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:09:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13577 states. [2018-11-07 18:09:04,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13577 to 13269. [2018-11-07 18:09:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13269 states. [2018-11-07 18:09:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13269 states to 13269 states and 15612 transitions. [2018-11-07 18:09:04,737 INFO L78 Accepts]: Start accepts. Automaton has 13269 states and 15612 transitions. Word has length 531 [2018-11-07 18:09:04,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:09:04,738 INFO L480 AbstractCegarLoop]: Abstraction has 13269 states and 15612 transitions. [2018-11-07 18:09:04,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:09:04,738 INFO L276 IsEmpty]: Start isEmpty. Operand 13269 states and 15612 transitions. [2018-11-07 18:09:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-11-07 18:09:04,753 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:09:04,753 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:04,753 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:09:04,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:04,754 INFO L82 PathProgramCache]: Analyzing trace with hash 788223742, now seen corresponding path program 1 times [2018-11-07 18:09:04,754 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:09:04,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:04,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:04,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:04,755 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:09:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-07 18:09:05,226 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:09:05,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:09:05,227 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:09:05,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:09:05,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:09:05,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:09:05,228 INFO L87 Difference]: Start difference. First operand 13269 states and 15612 transitions. Second operand 3 states. [2018-11-07 18:09:08,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:09:08,074 INFO L93 Difference]: Finished difference Result 22715 states and 28774 transitions. [2018-11-07 18:09:08,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:09:08,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 531 [2018-11-07 18:09:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:09:08,122 INFO L225 Difference]: With dead ends: 22715 [2018-11-07 18:09:08,122 INFO L226 Difference]: Without dead ends: 16407 [2018-11-07 18:09:08,144 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:09:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16407 states. [2018-11-07 18:09:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16407 to 16404. [2018-11-07 18:09:08,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16404 states. [2018-11-07 18:09:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16404 states to 16404 states and 19876 transitions. [2018-11-07 18:09:08,415 INFO L78 Accepts]: Start accepts. Automaton has 16404 states and 19876 transitions. Word has length 531 [2018-11-07 18:09:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:09:08,416 INFO L480 AbstractCegarLoop]: Abstraction has 16404 states and 19876 transitions. [2018-11-07 18:09:08,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:09:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 16404 states and 19876 transitions. [2018-11-07 18:09:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2018-11-07 18:09:08,435 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:09:08,435 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:08,436 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:09:08,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:08,436 INFO L82 PathProgramCache]: Analyzing trace with hash -343352365, now seen corresponding path program 1 times [2018-11-07 18:09:08,436 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:09:08,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:08,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:08,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:08,438 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:09:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 286 proven. 2 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-11-07 18:09:09,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:09:09,093 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:09:09,094 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 569 with the following transitions: [2018-11-07 18:09:09,094 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [621], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:09:09,099 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:09:09,100 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:09:09,183 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:09:10,821 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:09:10,821 INFO L272 AbstractInterpreter]: Visited 286 different actions 1709 times. Merged at 9 different actions 52 times. Widened at 1 different actions 1 times. Found 14 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:09:10,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:10,828 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:09:10,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:09:10,828 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:09:11,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:11,219 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:09:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:11,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:09:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 286 proven. 2 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-11-07 18:09:11,720 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:09:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 286 proven. 2 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-11-07 18:09:12,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:09:12,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-11-07 18:09:12,197 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:09:12,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:09:12,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:09:12,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:09:12,199 INFO L87 Difference]: Start difference. First operand 16404 states and 19876 transitions. Second operand 6 states. [2018-11-07 18:09:19,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:09:19,040 INFO L93 Difference]: Finished difference Result 35617 states and 48731 transitions. [2018-11-07 18:09:19,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:09:19,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 568 [2018-11-07 18:09:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:09:19,150 INFO L225 Difference]: With dead ends: 35617 [2018-11-07 18:09:19,151 INFO L226 Difference]: Without dead ends: 26174 [2018-11-07 18:09:19,185 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1137 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-07 18:09:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26174 states. [2018-11-07 18:09:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26174 to 25827. [2018-11-07 18:09:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25827 states. [2018-11-07 18:09:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25827 states to 25827 states and 31943 transitions. [2018-11-07 18:09:19,741 INFO L78 Accepts]: Start accepts. Automaton has 25827 states and 31943 transitions. Word has length 568 [2018-11-07 18:09:19,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:09:19,742 INFO L480 AbstractCegarLoop]: Abstraction has 25827 states and 31943 transitions. [2018-11-07 18:09:19,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:09:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 25827 states and 31943 transitions. [2018-11-07 18:09:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2018-11-07 18:09:19,764 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:09:19,765 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:19,765 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:09:19,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:19,765 INFO L82 PathProgramCache]: Analyzing trace with hash -805885197, now seen corresponding path program 1 times [2018-11-07 18:09:19,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:09:19,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:19,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:19,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:19,767 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:09:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 45 proven. 494 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-11-07 18:09:21,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:09:21,730 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:09:21,730 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 615 with the following transitions: [2018-11-07 18:09:21,730 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [625], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [857], [862], [864], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:09:21,735 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:09:21,735 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:09:21,879 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:09:23,407 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:09:23,408 INFO L272 AbstractInterpreter]: Visited 288 different actions 1729 times. Merged at 9 different actions 63 times. Widened at 1 different actions 2 times. Found 14 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:09:23,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:23,413 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:09:23,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:09:23,413 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:09:23,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:23,422 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Received shutdown request... [2018-11-07 18:09:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:23,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:09:23,607 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 18:09:23,808 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:09:23,808 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:09:23,813 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:09:23,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:09:23 BoogieIcfgContainer [2018-11-07 18:09:23,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:09:23,814 INFO L168 Benchmark]: Toolchain (without parser) took 210844.29 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-11-07 18:09:23,816 INFO L168 Benchmark]: CDTParser took 0.18 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. [2018-11-07 18:09:23,817 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1266.74 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. [2018-11-07 18:09:23,817 INFO L168 Benchmark]: Boogie Procedure Inliner took 222.66 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -902.8 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. [2018-11-07 18:09:23,818 INFO L168 Benchmark]: Boogie Preprocessor took 167.24 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2018-11-07 18:09:23,819 INFO L168 Benchmark]: RCFGBuilder took 5768.29 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 297.5 MB). Peak memory consumption was 297.5 MB. Max. memory is 7.1 GB. [2018-11-07 18:09:23,820 INFO L168 Benchmark]: TraceAbstraction took 203414.23 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.6 GB). Free memory was 1.9 GB in the beginning and 2.5 GB in the end (delta: -589.7 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-07 18:09:23,828 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 1266.74 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 222.66 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -902.8 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 167.24 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5768.29 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 297.5 MB). Peak memory consumption was 297.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 203414.23 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.6 GB). Free memory was 1.9 GB in the beginning and 2.5 GB in the end (delta: -589.7 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 615 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 203.3s OverallTime, 12 OverallIterations, 5 TraceHistogramMax, 169.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4496 SDtfs, 18078 SDslu, 2838 SDs, 0 SdLazy, 32456 SolverSat, 4666 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 77.9s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 3751 GetRequests, 3556 SyntacticMatches, 61 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25827occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.7s AbstIntTime, 7 AbstIntIterations, 4 AbstIntStrong, 0.9976170396766737 AbsIntWeakeningRatio, 0.07627118644067797 AbsIntAvgWeakeningVarsNumRemoved, 16.646023468057365 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 2148 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 5177 NumberOfCodeBlocks, 5177 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 6215 ConstructedInterpolants, 0 QuantifiedInterpolants, 5592631 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1541 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 4125/4224 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown