java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label13_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 18:16:53,760 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 18:16:53,767 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 18:16:53,782 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 18:16:53,782 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 18:16:53,783 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 18:16:53,785 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 18:16:53,787 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 18:16:53,788 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 18:16:53,789 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 18:16:53,790 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 18:16:53,790 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 18:16:53,791 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 18:16:53,792 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 18:16:53,793 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 18:16:53,794 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 18:16:53,795 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 18:16:53,797 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 18:16:53,799 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 18:16:53,801 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 18:16:53,802 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 18:16:53,803 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 18:16:53,806 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 18:16:53,812 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 18:16:53,813 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 18:16:53,813 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 18:16:53,814 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 18:16:53,815 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 18:16:53,830 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 18:16:53,830 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 18:16:53,831 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 18:16:53,831 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 18:16:53,831 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 18:16:53,832 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 18:16:53,832 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 18:16:53,832 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 18:16:53,832 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 18:16:53,832 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 18:16:53,833 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 18:16:53,833 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 18:16:53,833 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 18:16:53,834 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 18:16:53,834 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 18:16:53,834 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 18:16:53,834 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 18:16:53,834 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 18:16:53,834 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 18:16:53,835 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 18:16:53,835 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 18:16:53,835 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 18:16:53,835 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 18:16:53,836 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 18:16:53,836 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 18:16:53,836 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 18:16:53,836 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 18:16:53,836 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 18:16:53,836 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 18:16:53,837 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 18:16:53,837 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 18:16:53,837 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 18:16:53,837 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 18:16:53,837 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 18:16:53,880 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 18:16:53,893 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 18:16:53,897 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 18:16:53,898 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 18:16:53,899 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 18:16:53,900 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label13_false-unreach-call.c [2018-10-24 18:16:53,954 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f76326853/8a7611e0edf74dec8d20c73d341b2c10/FLAG390ee5876 [2018-10-24 18:16:54,668 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 18:16:54,669 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label13_false-unreach-call.c [2018-10-24 18:16:54,709 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f76326853/8a7611e0edf74dec8d20c73d341b2c10/FLAG390ee5876 [2018-10-24 18:16:54,728 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f76326853/8a7611e0edf74dec8d20c73d341b2c10 [2018-10-24 18:16:54,741 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 18:16:54,744 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 18:16:54,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 18:16:54,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 18:16:54,753 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 18:16:54,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:16:54" (1/1) ... [2018-10-24 18:16:54,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b326c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:54, skipping insertion in model container [2018-10-24 18:16:54,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:16:54" (1/1) ... [2018-10-24 18:16:54,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 18:16:54,945 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 18:16:56,369 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:16:56,374 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 18:16:57,019 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:16:57,055 INFO L193 MainTranslator]: Completed translation [2018-10-24 18:16:57,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:57 WrapperNode [2018-10-24 18:16:57,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 18:16:57,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 18:16:57,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 18:16:57,057 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 18:16:57,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:57" (1/1) ... [2018-10-24 18:16:57,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:57" (1/1) ... [2018-10-24 18:16:57,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 18:16:57,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 18:16:57,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 18:16:57,584 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 18:16:57,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:57" (1/1) ... [2018-10-24 18:16:57,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:57" (1/1) ... [2018-10-24 18:16:57,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:57" (1/1) ... [2018-10-24 18:16:57,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:57" (1/1) ... [2018-10-24 18:16:57,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:57" (1/1) ... [2018-10-24 18:16:57,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:57" (1/1) ... [2018-10-24 18:16:57,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:57" (1/1) ... [2018-10-24 18:16:57,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 18:16:57,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 18:16:57,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 18:16:57,870 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 18:16:57,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 18:16:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 18:16:57,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 18:16:57,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-24 18:16:57,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-24 18:16:57,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-24 18:16:57,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-24 18:16:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 18:16:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 18:16:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 18:16:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 18:16:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 18:16:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 18:16:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 18:16:57,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 18:17:09,313 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 18:17:09,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:17:09 BoogieIcfgContainer [2018-10-24 18:17:09,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 18:17:09,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 18:17:09,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 18:17:09,319 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 18:17:09,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:16:54" (1/3) ... [2018-10-24 18:17:09,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279b73a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:17:09, skipping insertion in model container [2018-10-24 18:17:09,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:16:57" (2/3) ... [2018-10-24 18:17:09,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279b73a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:17:09, skipping insertion in model container [2018-10-24 18:17:09,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:17:09" (3/3) ... [2018-10-24 18:17:09,324 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label13_false-unreach-call.c [2018-10-24 18:17:09,335 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 18:17:09,351 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 18:17:09,371 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 18:17:09,434 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 18:17:09,435 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 18:17:09,435 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 18:17:09,435 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 18:17:09,435 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 18:17:09,435 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 18:17:09,436 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 18:17:09,436 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 18:17:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-10-24 18:17:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-24 18:17:09,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:17:09,507 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:17:09,510 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:17:09,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:17:09,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1319252181, now seen corresponding path program 1 times [2018-10-24 18:17:09,520 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:17:09,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:17:09,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:17:09,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:17:09,584 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:17:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:17:10,018 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:17:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:17:10,137 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:17:10,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 18:17:10,138 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:17:10,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 18:17:10,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 18:17:10,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 18:17:10,168 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-10-24 18:17:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:17:19,009 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-10-24 18:17:19,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 18:17:19,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2018-10-24 18:17:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:17:19,065 INFO L225 Difference]: With dead ends: 2446 [2018-10-24 18:17:19,065 INFO L226 Difference]: Without dead ends: 1604 [2018-10-24 18:17:19,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 18:17:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-10-24 18:17:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-10-24 18:17:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-10-24 18:17:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 3021 transitions. [2018-10-24 18:17:19,261 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 3021 transitions. Word has length 35 [2018-10-24 18:17:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:17:19,262 INFO L481 AbstractCegarLoop]: Abstraction has 1604 states and 3021 transitions. [2018-10-24 18:17:19,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 18:17:19,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 3021 transitions. [2018-10-24 18:17:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-24 18:17:19,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:17:19,270 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:17:19,270 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:17:19,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:17:19,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1587812788, now seen corresponding path program 1 times [2018-10-24 18:17:19,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:17:19,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:17:19,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:17:19,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:17:19,273 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:17:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:17:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:17:19,635 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:17:19,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:17:19,636 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:17:19,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:17:19,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:17:19,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:17:19,639 INFO L87 Difference]: Start difference. First operand 1604 states and 3021 transitions. Second operand 6 states. [2018-10-24 18:17:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:17:37,679 INFO L93 Difference]: Finished difference Result 6330 states and 12128 transitions. [2018-10-24 18:17:37,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:17:37,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2018-10-24 18:17:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:17:37,718 INFO L225 Difference]: With dead ends: 6330 [2018-10-24 18:17:37,718 INFO L226 Difference]: Without dead ends: 4732 [2018-10-24 18:17:37,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 18:17:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2018-10-24 18:17:37,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4700. [2018-10-24 18:17:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4700 states. [2018-10-24 18:17:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4700 states to 4700 states and 7674 transitions. [2018-10-24 18:17:37,881 INFO L78 Accepts]: Start accepts. Automaton has 4700 states and 7674 transitions. Word has length 113 [2018-10-24 18:17:37,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:17:37,882 INFO L481 AbstractCegarLoop]: Abstraction has 4700 states and 7674 transitions. [2018-10-24 18:17:37,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:17:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4700 states and 7674 transitions. [2018-10-24 18:17:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-24 18:17:37,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:17:37,887 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:17:37,887 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:17:37,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:17:37,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1750714015, now seen corresponding path program 1 times [2018-10-24 18:17:37,888 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:17:37,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:17:37,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:17:37,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:17:37,890 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:17:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:17:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:17:38,334 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:17:38,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 18:17:38,334 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:17:38,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 18:17:38,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 18:17:38,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 18:17:38,337 INFO L87 Difference]: Start difference. First operand 4700 states and 7674 transitions. Second operand 5 states. [2018-10-24 18:17:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:17:47,229 INFO L93 Difference]: Finished difference Result 14300 states and 23670 transitions. [2018-10-24 18:17:47,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 18:17:47,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2018-10-24 18:17:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:17:47,287 INFO L225 Difference]: With dead ends: 14300 [2018-10-24 18:17:47,287 INFO L226 Difference]: Without dead ends: 9606 [2018-10-24 18:17:47,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:17:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9606 states. [2018-10-24 18:17:47,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9606 to 9524. [2018-10-24 18:17:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9524 states. [2018-10-24 18:17:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 14353 transitions. [2018-10-24 18:17:47,575 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 14353 transitions. Word has length 116 [2018-10-24 18:17:47,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:17:47,576 INFO L481 AbstractCegarLoop]: Abstraction has 9524 states and 14353 transitions. [2018-10-24 18:17:47,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 18:17:47,576 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 14353 transitions. [2018-10-24 18:17:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-24 18:17:47,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:17:47,580 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:17:47,580 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:17:47,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:17:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash 716449312, now seen corresponding path program 1 times [2018-10-24 18:17:47,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:17:47,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:17:47,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:17:47,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:17:47,582 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:17:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:17:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:17:48,046 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:17:48,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:17:48,046 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:17:48,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:17:48,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:17:48,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:17:48,048 INFO L87 Difference]: Start difference. First operand 9524 states and 14353 transitions. Second operand 6 states. [2018-10-24 18:18:06,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:18:06,386 INFO L93 Difference]: Finished difference Result 38568 states and 63845 transitions. [2018-10-24 18:18:06,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 18:18:06,386 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2018-10-24 18:18:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:18:06,590 INFO L225 Difference]: With dead ends: 38568 [2018-10-24 18:18:06,590 INFO L226 Difference]: Without dead ends: 29050 [2018-10-24 18:18:06,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-24 18:18:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29050 states. [2018-10-24 18:18:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29050 to 28852. [2018-10-24 18:18:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28852 states. [2018-10-24 18:18:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28852 states to 28852 states and 42446 transitions. [2018-10-24 18:18:07,605 INFO L78 Accepts]: Start accepts. Automaton has 28852 states and 42446 transitions. Word has length 139 [2018-10-24 18:18:07,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:18:07,606 INFO L481 AbstractCegarLoop]: Abstraction has 28852 states and 42446 transitions. [2018-10-24 18:18:07,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:18:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 28852 states and 42446 transitions. [2018-10-24 18:18:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-24 18:18:07,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:18:07,610 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:18:07,610 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:18:07,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:18:07,611 INFO L82 PathProgramCache]: Analyzing trace with hash 72543737, now seen corresponding path program 1 times [2018-10-24 18:18:07,611 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:18:07,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:18:07,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:18:07,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:18:07,612 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:18:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:18:07,894 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:18:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:18:08,292 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:18:08,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:18:08,292 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:18:08,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:18:08,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:18:08,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:18:08,296 INFO L87 Difference]: Start difference. First operand 28852 states and 42446 transitions. Second operand 6 states. [2018-10-24 18:18:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:18:21,907 INFO L93 Difference]: Finished difference Result 77223 states and 121206 transitions. [2018-10-24 18:18:21,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:18:21,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2018-10-24 18:18:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:18:22,147 INFO L225 Difference]: With dead ends: 77223 [2018-10-24 18:18:22,147 INFO L226 Difference]: Without dead ends: 48377 [2018-10-24 18:18:22,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 18:18:22,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48377 states. [2018-10-24 18:18:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48377 to 48168. [2018-10-24 18:18:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48168 states. [2018-10-24 18:18:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48168 states to 48168 states and 68380 transitions. [2018-10-24 18:18:23,813 INFO L78 Accepts]: Start accepts. Automaton has 48168 states and 68380 transitions. Word has length 160 [2018-10-24 18:18:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:18:23,814 INFO L481 AbstractCegarLoop]: Abstraction has 48168 states and 68380 transitions. [2018-10-24 18:18:23,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:18:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 48168 states and 68380 transitions. [2018-10-24 18:18:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-24 18:18:23,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:18:23,824 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 18:18:23,824 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:18:23,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:18:23,824 INFO L82 PathProgramCache]: Analyzing trace with hash -737174824, now seen corresponding path program 1 times [2018-10-24 18:18:23,824 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:18:23,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:18:23,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:18:23,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:18:23,826 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:18:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:18:24,113 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:18:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 56 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 18:18:24,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:18:24,245 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:18:24,246 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 231 with the following transitions: [2018-10-24 18:18:24,248 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2047], [2049], [2052], [2060], [2068], [2076], [2084], [2092], [2100], [2108], [2116], [2124], [2132], [2140], [2148], [2156], [2164], [2172], [2180], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2404], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2536], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-24 18:18:24,319 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:18:24,319 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:18:28,629 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 18:18:29,888 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 18:18:29,890 INFO L272 AbstractInterpreter]: Visited 119 different actions 119 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-24 18:18:29,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:18:29,941 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 18:18:33,077 INFO L232 lantSequenceWeakener]: Weakened 222 states. On average, predicates are now at 75.35% of their original sizes. [2018-10-24 18:18:33,077 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 18:18:33,743 INFO L413 sIntCurrentIteration]: We have 229 unified AI predicates [2018-10-24 18:18:33,743 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 18:18:33,744 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 18:18:33,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2018-10-24 18:18:33,745 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:18:33,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 18:18:33,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 18:18:33,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 18:18:33,746 INFO L87 Difference]: Start difference. First operand 48168 states and 68380 transitions. Second operand 8 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown