java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label08_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 12:31:54,153 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 12:31:54,155 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 12:31:54,170 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 12:31:54,170 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 12:31:54,171 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 12:31:54,172 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 12:31:54,174 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 12:31:54,176 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 12:31:54,177 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 12:31:54,178 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 12:31:54,178 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 12:31:54,179 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 12:31:54,181 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 12:31:54,185 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 12:31:54,186 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 12:31:54,187 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 12:31:54,190 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 12:31:54,195 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 12:31:54,200 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 12:31:54,202 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 12:31:54,203 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 12:31:54,208 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 12:31:54,224 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 12:31:54,253 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 12:31:54,253 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 12:31:54,254 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 12:31:54,254 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 12:31:54,254 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 12:31:54,254 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 12:31:54,255 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 12:31:54,255 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 12:31:54,255 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 12:31:54,255 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 12:31:54,255 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 12:31:54,255 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 12:31:54,256 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 12:31:54,256 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 12:31:54,257 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 12:31:54,257 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 12:31:54,257 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 12:31:54,257 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 12:31:54,257 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 12:31:54,258 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 12:31:54,258 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 12:31:54,258 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 12:31:54,258 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 12:31:54,258 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 12:31:54,258 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 12:31:54,259 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 12:31:54,259 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 12:31:54,259 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 12:31:54,259 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 12:31:54,259 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 12:31:54,260 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 12:31:54,260 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 12:31:54,260 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 12:31:54,260 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 12:31:54,305 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 12:31:54,318 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 12:31:54,322 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 12:31:54,324 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 12:31:54,324 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 12:31:54,325 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label08_false-unreach-call.c [2018-11-07 12:31:54,387 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5893c5f47/dc7153d1ee3e4f949871b3c106bebce0/FLAG2ee9f1e69 [2018-11-07 12:31:55,193 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 12:31:55,194 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label08_false-unreach-call.c [2018-11-07 12:31:55,229 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5893c5f47/dc7153d1ee3e4f949871b3c106bebce0/FLAG2ee9f1e69 [2018-11-07 12:31:55,249 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5893c5f47/dc7153d1ee3e4f949871b3c106bebce0 [2018-11-07 12:31:55,262 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 12:31:55,264 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 12:31:55,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 12:31:55,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 12:31:55,269 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 12:31:55,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:31:55" (1/1) ... [2018-11-07 12:31:55,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea9c6f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:55, skipping insertion in model container [2018-11-07 12:31:55,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:31:55" (1/1) ... [2018-11-07 12:31:55,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 12:31:55,434 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 12:31:56,789 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 12:31:56,794 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 12:31:57,377 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 12:31:57,408 INFO L193 MainTranslator]: Completed translation [2018-11-07 12:31:57,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:57 WrapperNode [2018-11-07 12:31:57,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 12:31:57,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 12:31:57,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 12:31:57,410 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 12:31:57,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:57" (1/1) ... [2018-11-07 12:31:57,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:57" (1/1) ... [2018-11-07 12:31:57,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 12:31:57,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 12:31:57,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 12:31:57,694 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 12:31:57,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:57" (1/1) ... [2018-11-07 12:31:57,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:57" (1/1) ... [2018-11-07 12:31:57,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:57" (1/1) ... [2018-11-07 12:31:57,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:57" (1/1) ... [2018-11-07 12:31:57,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:57" (1/1) ... [2018-11-07 12:31:57,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:57" (1/1) ... [2018-11-07 12:31:57,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:57" (1/1) ... [2018-11-07 12:31:57,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 12:31:57,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 12:31:57,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 12:31:57,916 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 12:31:57,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:57" (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 12:31:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 12:31:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 12:31:57,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 12:31:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 12:31:57,990 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 12:31:57,990 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 12:31:57,991 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 12:31:57,991 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 12:31:57,991 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 12:31:57,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 12:31:57,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 12:31:57,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 12:31:57,992 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 12:32:05,798 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 12:32:05,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:32:05 BoogieIcfgContainer [2018-11-07 12:32:05,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 12:32:05,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 12:32:05,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 12:32:05,803 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 12:32:05,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:31:55" (1/3) ... [2018-11-07 12:32:05,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69153bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:32:05, skipping insertion in model container [2018-11-07 12:32:05,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:31:57" (2/3) ... [2018-11-07 12:32:05,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69153bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:32:05, skipping insertion in model container [2018-11-07 12:32:05,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:32:05" (3/3) ... [2018-11-07 12:32:05,807 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label08_false-unreach-call.c [2018-11-07 12:32:05,818 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 12:32:05,828 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 12:32:05,847 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 12:32:05,901 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 12:32:05,902 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 12:32:05,902 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 12:32:05,902 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 12:32:05,902 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 12:32:05,903 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 12:32:05,903 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 12:32:05,903 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 12:32:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-11-07 12:32:05,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-07 12:32:05,952 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:32:05,953 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] [2018-11-07 12:32:05,956 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:32:05,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:32:05,963 INFO L82 PathProgramCache]: Analyzing trace with hash 735211228, now seen corresponding path program 1 times [2018-11-07 12:32:05,967 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:32:06,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:32:06,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:32:06,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:32:06,019 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:32:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:32:06,403 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 12:32:06,405 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:32:06,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 12:32:06,406 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:32:06,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 12:32:06,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 12:32:06,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:32:06,436 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 4 states. [2018-11-07 12:32:17,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:32:17,792 INFO L93 Difference]: Finished difference Result 2974 states and 5747 transitions. [2018-11-07 12:32:17,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 12:32:17,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2018-11-07 12:32:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:32:17,830 INFO L225 Difference]: With dead ends: 2974 [2018-11-07 12:32:17,831 INFO L226 Difference]: Without dead ends: 2193 [2018-11-07 12:32:17,841 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 12:32:17,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2018-11-07 12:32:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1474. [2018-11-07 12:32:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-11-07 12:32:18,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2384 transitions. [2018-11-07 12:32:18,093 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2384 transitions. Word has length 28 [2018-11-07 12:32:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:32:18,093 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 2384 transitions. [2018-11-07 12:32:18,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 12:32:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2384 transitions. [2018-11-07 12:32:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-11-07 12:32:18,104 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:32:18,104 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:32:18,105 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:32:18,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:32:18,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1723286230, now seen corresponding path program 1 times [2018-11-07 12:32:18,107 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:32:18,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:32:18,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:32:18,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:32:18,110 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:32:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:32:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:32:18,502 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:32:18,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 12:32:18,503 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:32:18,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 12:32:18,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 12:32:18,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 12:32:18,506 INFO L87 Difference]: Start difference. First operand 1474 states and 2384 transitions. Second operand 5 states. [2018-11-07 12:32:27,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:32:27,396 INFO L93 Difference]: Finished difference Result 4422 states and 7235 transitions. [2018-11-07 12:32:27,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 12:32:27,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2018-11-07 12:32:27,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:32:27,424 INFO L225 Difference]: With dead ends: 4422 [2018-11-07 12:32:27,424 INFO L226 Difference]: Without dead ends: 2954 [2018-11-07 12:32:27,432 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 12:32:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2018-11-07 12:32:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2930. [2018-11-07 12:32:27,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2930 states. [2018-11-07 12:32:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2930 states to 2930 states and 4516 transitions. [2018-11-07 12:32:27,541 INFO L78 Accepts]: Start accepts. Automaton has 2930 states and 4516 transitions. Word has length 98 [2018-11-07 12:32:27,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:32:27,542 INFO L480 AbstractCegarLoop]: Abstraction has 2930 states and 4516 transitions. [2018-11-07 12:32:27,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 12:32:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2930 states and 4516 transitions. [2018-11-07 12:32:27,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-11-07 12:32:27,548 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:32:27,550 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:32:27,550 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:32:27,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:32:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash 374879586, now seen corresponding path program 1 times [2018-11-07 12:32:27,551 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:32:27,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:32:27,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:32:27,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:32:27,552 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:32:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:32:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:32:27,849 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:32:27,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 12:32:27,850 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:32:27,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 12:32:27,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 12:32:27,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 12:32:27,851 INFO L87 Difference]: Start difference. First operand 2930 states and 4516 transitions. Second operand 6 states. [2018-11-07 12:32:35,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:32:35,571 INFO L93 Difference]: Finished difference Result 10279 states and 16084 transitions. [2018-11-07 12:32:35,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 12:32:35,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2018-11-07 12:32:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:32:35,626 INFO L225 Difference]: With dead ends: 10279 [2018-11-07 12:32:35,626 INFO L226 Difference]: Without dead ends: 7355 [2018-11-07 12:32:35,644 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 12:32:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7355 states. [2018-11-07 12:32:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7355 to 7296. [2018-11-07 12:32:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7296 states. [2018-11-07 12:32:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 10495 transitions. [2018-11-07 12:32:35,858 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 10495 transitions. Word has length 102 [2018-11-07 12:32:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:32:35,859 INFO L480 AbstractCegarLoop]: Abstraction has 7296 states and 10495 transitions. [2018-11-07 12:32:35,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 12:32:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 10495 transitions. [2018-11-07 12:32:35,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-11-07 12:32:35,870 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:32:35,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:32:35,870 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:32:35,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:32:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1832820439, now seen corresponding path program 1 times [2018-11-07 12:32:35,871 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:32:35,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:32:35,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:32:35,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:32:35,872 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:32:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:32:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:32:36,214 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:32:36,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 12:32:36,215 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:32:36,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 12:32:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 12:32:36,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 12:32:36,216 INFO L87 Difference]: Start difference. First operand 7296 states and 10495 transitions. Second operand 6 states. [2018-11-07 12:32:43,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:32:43,300 INFO L93 Difference]: Finished difference Result 18993 states and 28013 transitions. [2018-11-07 12:32:43,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 12:32:43,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2018-11-07 12:32:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:32:43,351 INFO L225 Difference]: With dead ends: 18993 [2018-11-07 12:32:43,352 INFO L226 Difference]: Without dead ends: 11703 [2018-11-07 12:32:43,379 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 12:32:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11703 states. [2018-11-07 12:32:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11703 to 11639. [2018-11-07 12:32:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11639 states. [2018-11-07 12:32:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11639 states to 11639 states and 16002 transitions. [2018-11-07 12:32:43,635 INFO L78 Accepts]: Start accepts. Automaton has 11639 states and 16002 transitions. Word has length 123 [2018-11-07 12:32:43,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:32:43,635 INFO L480 AbstractCegarLoop]: Abstraction has 11639 states and 16002 transitions. [2018-11-07 12:32:43,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 12:32:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand 11639 states and 16002 transitions. [2018-11-07 12:32:43,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-11-07 12:32:43,637 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:32:43,638 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:32:43,638 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:32:43,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:32:43,638 INFO L82 PathProgramCache]: Analyzing trace with hash 407388415, now seen corresponding path program 1 times [2018-11-07 12:32:43,638 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:32:43,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:32:43,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:32:43,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:32:43,640 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:32:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:32:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 12:32:43,806 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:32:43,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 12:32:43,806 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:32:43,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 12:32:43,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 12:32:43,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:32:43,808 INFO L87 Difference]: Start difference. First operand 11639 states and 16002 transitions. Second operand 4 states. [2018-11-07 12:32:50,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:32:50,432 INFO L93 Difference]: Finished difference Result 27522 states and 38221 transitions. [2018-11-07 12:32:50,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 12:32:50,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2018-11-07 12:32:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:32:50,509 INFO L225 Difference]: With dead ends: 27522 [2018-11-07 12:32:50,510 INFO L226 Difference]: Without dead ends: 15889 [2018-11-07 12:32:50,559 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:32:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15889 states. [2018-11-07 12:32:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15889 to 15886. [2018-11-07 12:32:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15886 states. [2018-11-07 12:32:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15886 states to 15886 states and 19859 transitions. [2018-11-07 12:32:51,160 INFO L78 Accepts]: Start accepts. Automaton has 15886 states and 19859 transitions. Word has length 135 [2018-11-07 12:32:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:32:51,161 INFO L480 AbstractCegarLoop]: Abstraction has 15886 states and 19859 transitions. [2018-11-07 12:32:51,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 12:32:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand 15886 states and 19859 transitions. [2018-11-07 12:32:51,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-11-07 12:32:51,168 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:32:51,168 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 12:32:51,168 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:32:51,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:32:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1510117645, now seen corresponding path program 1 times [2018-11-07 12:32:51,169 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:32:51,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:32:51,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:32:51,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:32:51,170 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:32:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:32:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 12:32:51,418 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:32:51,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 12:32:51,418 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:32:51,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 12:32:51,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 12:32:51,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:32:51,419 INFO L87 Difference]: Start difference. First operand 15886 states and 19859 transitions. Second operand 4 states. [2018-11-07 12:32:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:32:58,911 INFO L93 Difference]: Finished difference Result 58570 states and 75868 transitions. [2018-11-07 12:32:58,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 12:32:58,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 205 [2018-11-07 12:32:58,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:32:59,088 INFO L225 Difference]: With dead ends: 58570 [2018-11-07 12:32:59,088 INFO L226 Difference]: Without dead ends: 42690 [2018-11-07 12:32:59,135 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 12:32:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42690 states. [2018-11-07 12:33:00,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42690 to 40570. [2018-11-07 12:33:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40570 states. [2018-11-07 12:33:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40570 states to 40570 states and 50550 transitions. [2018-11-07 12:33:00,264 INFO L78 Accepts]: Start accepts. Automaton has 40570 states and 50550 transitions. Word has length 205 [2018-11-07 12:33:00,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:33:00,265 INFO L480 AbstractCegarLoop]: Abstraction has 40570 states and 50550 transitions. [2018-11-07 12:33:00,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 12:33:00,266 INFO L276 IsEmpty]: Start isEmpty. Operand 40570 states and 50550 transitions. [2018-11-07 12:33:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-11-07 12:33:00,278 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:33:00,278 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 12:33:00,279 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:33:00,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:33:00,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1838878876, now seen corresponding path program 1 times [2018-11-07 12:33:00,279 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:33:00,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:33:00,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:33:00,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:33:00,286 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:33:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:33:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-11-07 12:33:00,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 12:33:00,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 12:33:00,585 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:33:00,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 12:33:00,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 12:33:00,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 12:33:00,587 INFO L87 Difference]: Start difference. First operand 40570 states and 50550 transitions. Second operand 4 states. [2018-11-07 12:33:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 12:33:06,821 INFO L93 Difference]: Finished difference Result 91037 states and 114482 transitions. [2018-11-07 12:33:06,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 12:33:06,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 286 [2018-11-07 12:33:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 12:33:06,979 INFO L225 Difference]: With dead ends: 91037 [2018-11-07 12:33:06,979 INFO L226 Difference]: Without dead ends: 50473 [2018-11-07 12:33:07,057 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 12:33:07,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50473 states. [2018-11-07 12:33:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50473 to 49061. [2018-11-07 12:33:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49061 states. [2018-11-07 12:33:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49061 states to 49061 states and 57553 transitions. [2018-11-07 12:33:08,290 INFO L78 Accepts]: Start accepts. Automaton has 49061 states and 57553 transitions. Word has length 286 [2018-11-07 12:33:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 12:33:08,291 INFO L480 AbstractCegarLoop]: Abstraction has 49061 states and 57553 transitions. [2018-11-07 12:33:08,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 12:33:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 49061 states and 57553 transitions. [2018-11-07 12:33:08,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-11-07 12:33:08,328 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 12:33:08,328 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 12:33:08,329 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 12:33:08,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:33:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1221704300, now seen corresponding path program 1 times [2018-11-07 12:33:08,329 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 12:33:08,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:33:08,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 12:33:08,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 12:33:08,331 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 12:33:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 12:33:08,951 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-11-07 12:33:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 42 proven. 157 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 12:33:09,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 12:33:09,618 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 12:33:09,619 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 415 with the following transitions: [2018-11-07 12:33:09,622 INFO L202 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1747], [1749], [1752], [1760], [1768], [1776], [1784], [1792], [1800], [1808], [1816], [1824], [1832], [1840], [1848], [1856], [1864], [1872], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2265], [2269], [2273], [2277], [2281], [2285], [2289], [2293], [2297], [2301], [2305], [2309], [2313], [2317], [2321], [2325], [2329], [2333], [2337], [2341], [2345], [2349], [2353], [2357], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2484], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2537], [2541], [2545], [2549], [2553], [2557], [2561], [2565], [2569], [2573], [2577], [2581], [2585], [2589], [2593], [2597], [2601], [2605], [2609], [2613], [2617], [2621], [2625], [2629], [2633], [2637], [2641], [2645], [2649], [2653], [2657], [2661], [2665], [2669], [2673], [2677], [2681], [2685], [2689], [2693], [2697], [2701], [2705], [2709], [2713], [2717], [2721], [2725], [2729], [2732], [2996], [3000], [3004], [3010], [3014], [3016], [3025], [3026], [3027], [3029], [3030] [2018-11-07 12:33:09,690 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 12:33:09,690 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 12:33:10,692 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 12:33:10,694 INFO L272 AbstractInterpreter]: Visited 229 different actions 229 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 12:33:10,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 12:33:10,746 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 12:33:11,885 INFO L227 lantSequenceWeakener]: Weakened 405 states. On average, predicates are now at 77.38% of their original sizes. [2018-11-07 12:33:11,885 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 12:33:12,379 INFO L415 sIntCurrentIteration]: We unified 413 AI predicates to 413 [2018-11-07 12:33:12,379 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 12:33:12,381 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 12:33:12,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2018-11-07 12:33:12,381 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 12:33:12,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 12:33:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 12:33:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 12:33:12,383 INFO L87 Difference]: Start difference. First operand 49061 states and 57553 transitions. Second operand 8 states. [2018-11-07 12:33:23,497 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown