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_label54_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-24 01:20:50,211 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 01:20:50,213 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 01:20:50,225 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 01:20:50,225 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 01:20:50,226 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 01:20:50,228 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 01:20:50,229 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 01:20:50,231 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 01:20:50,232 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 01:20:50,233 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 01:20:50,233 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 01:20:50,234 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 01:20:50,235 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 01:20:50,236 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 01:20:50,237 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 01:20:50,238 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 01:20:50,240 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 01:20:50,242 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 01:20:50,244 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 01:20:50,246 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 01:20:50,247 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 01:20:50,250 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 01:20:50,263 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 01:20:50,263 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 01:20:50,266 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 01:20:50,267 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 01:20:50,267 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 01:20:50,294 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 01:20:50,294 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 01:20:50,295 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 01:20:50,295 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 01:20:50,296 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 01:20:50,296 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 01:20:50,296 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 01:20:50,296 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 01:20:50,296 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 01:20:50,297 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 01:20:50,297 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 01:20:50,297 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 01:20:50,298 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 01:20:50,298 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 01:20:50,298 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 01:20:50,298 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 01:20:50,298 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 01:20:50,299 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 01:20:50,299 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 01:20:50,299 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 01:20:50,299 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 01:20:50,299 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 01:20:50,300 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 01:20:50,300 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 01:20:50,300 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 01:20:50,300 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 01:20:50,300 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 01:20:50,301 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 01:20:50,301 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 01:20:50,301 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 01:20:50,301 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 01:20:50,301 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 01:20:50,302 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 01:20:50,302 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 01:20:50,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 01:20:50,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 01:20:50,386 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 01:20:50,388 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 01:20:50,388 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 01:20:50,389 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label54_true-unreach-call.c [2018-10-24 01:20:50,451 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3c1dc1744/0aae7b929c75421fbbf9511cef06f8d1/FLAG326843586 [2018-10-24 01:20:51,201 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 01:20:51,202 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label54_true-unreach-call.c [2018-10-24 01:20:51,238 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3c1dc1744/0aae7b929c75421fbbf9511cef06f8d1/FLAG326843586 [2018-10-24 01:20:51,258 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3c1dc1744/0aae7b929c75421fbbf9511cef06f8d1 [2018-10-24 01:20:51,272 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 01:20:51,274 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 01:20:51,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 01:20:51,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 01:20:51,283 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 01:20:51,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:20:51" (1/1) ... [2018-10-24 01:20:51,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c90f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:51, skipping insertion in model container [2018-10-24 01:20:51,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:20:51" (1/1) ... [2018-10-24 01:20:51,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 01:20:51,473 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 01:20:52,779 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 01:20:52,786 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 01:20:53,416 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 01:20:53,454 INFO L193 MainTranslator]: Completed translation [2018-10-24 01:20:53,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:53 WrapperNode [2018-10-24 01:20:53,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 01:20:53,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 01:20:53,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 01:20:53,456 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 01:20:53,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:53" (1/1) ... [2018-10-24 01:20:53,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:53" (1/1) ... [2018-10-24 01:20:53,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 01:20:53,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 01:20:53,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 01:20:53,938 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 01:20:53,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:53" (1/1) ... [2018-10-24 01:20:53,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:53" (1/1) ... [2018-10-24 01:20:53,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:53" (1/1) ... [2018-10-24 01:20:53,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:53" (1/1) ... [2018-10-24 01:20:54,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:53" (1/1) ... [2018-10-24 01:20:54,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:53" (1/1) ... [2018-10-24 01:20:54,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:53" (1/1) ... [2018-10-24 01:20:54,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 01:20:54,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 01:20:54,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 01:20:54,214 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 01:20:54,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:53" (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 01:20:54,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 01:20:54,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 01:20:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-24 01:20:54,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-24 01:20:54,282 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-24 01:20:54,283 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-24 01:20:54,283 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 01:20:54,283 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 01:20:54,283 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 01:20:54,283 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 01:20:54,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 01:20:54,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 01:20:54,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 01:20:54,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 01:21:05,224 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 01:21:05,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:21:05 BoogieIcfgContainer [2018-10-24 01:21:05,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 01:21:05,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 01:21:05,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 01:21:05,232 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 01:21:05,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:20:51" (1/3) ... [2018-10-24 01:21:05,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b211636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:21:05, skipping insertion in model container [2018-10-24 01:21:05,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:20:53" (2/3) ... [2018-10-24 01:21:05,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b211636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:21:05, skipping insertion in model container [2018-10-24 01:21:05,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:21:05" (3/3) ... [2018-10-24 01:21:05,236 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label54_true-unreach-call.c [2018-10-24 01:21:05,246 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 01:21:05,255 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 01:21:05,273 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 01:21:05,319 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 01:21:05,319 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 01:21:05,319 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 01:21:05,319 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 01:21:05,319 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 01:21:05,320 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 01:21:05,320 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 01:21:05,320 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 01:21:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-10-24 01:21:05,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-24 01:21:05,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:21:05,368 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, 1, 1, 1, 1, 1] [2018-10-24 01:21:05,371 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:21:05,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:21:05,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2139876300, now seen corresponding path program 1 times [2018-10-24 01:21:05,380 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:21:05,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:21:05,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:21:05,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:21:05,437 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:21:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:21:05,863 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 01:21:05,867 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 01:21:05,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 01:21:05,867 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:21:05,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 01:21:05,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 01:21:05,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 01:21:05,888 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-10-24 01:21:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:21:15,817 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-10-24 01:21:15,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 01:21:15,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2018-10-24 01:21:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:21:15,857 INFO L225 Difference]: With dead ends: 2446 [2018-10-24 01:21:15,857 INFO L226 Difference]: Without dead ends: 1604 [2018-10-24 01:21:15,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 01:21:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-10-24 01:21:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-10-24 01:21:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-10-24 01:21:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2909 transitions. [2018-10-24 01:21:16,047 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2909 transitions. Word has length 40 [2018-10-24 01:21:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:21:16,047 INFO L481 AbstractCegarLoop]: Abstraction has 1604 states and 2909 transitions. [2018-10-24 01:21:16,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 01:21:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2909 transitions. [2018-10-24 01:21:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-24 01:21:16,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:21:16,057 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, 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] [2018-10-24 01:21:16,058 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:21:16,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:21:16,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1482898002, now seen corresponding path program 1 times [2018-10-24 01:21:16,059 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:21:16,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:21:16,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:21:16,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:21:16,061 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:21:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:21:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 01:21:16,512 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 01:21:16,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 01:21:16,513 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:21:16,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 01:21:16,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 01:21:16,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 01:21:16,516 INFO L87 Difference]: Start difference. First operand 1604 states and 2909 transitions. Second operand 5 states. [2018-10-24 01:21:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:21:26,750 INFO L93 Difference]: Finished difference Result 4818 states and 8826 transitions. [2018-10-24 01:21:26,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 01:21:26,752 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2018-10-24 01:21:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:21:26,778 INFO L225 Difference]: With dead ends: 4818 [2018-10-24 01:21:26,778 INFO L226 Difference]: Without dead ends: 3220 [2018-10-24 01:21:26,785 INFO L605 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 [2018-10-24 01:21:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2018-10-24 01:21:26,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3186. [2018-10-24 01:21:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3186 states. [2018-10-24 01:21:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 5594 transitions. [2018-10-24 01:21:26,910 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 5594 transitions. Word has length 114 [2018-10-24 01:21:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:21:26,911 INFO L481 AbstractCegarLoop]: Abstraction has 3186 states and 5594 transitions. [2018-10-24 01:21:26,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 01:21:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 5594 transitions. [2018-10-24 01:21:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-24 01:21:26,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:21:26,921 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, 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] [2018-10-24 01:21:26,921 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:21:26,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:21:26,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1633492773, now seen corresponding path program 1 times [2018-10-24 01:21:26,922 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:21:26,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:21:26,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:21:26,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:21:26,924 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:21:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:21:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 01:21:27,190 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 01:21:27,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 01:21:27,190 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:21:27,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 01:21:27,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 01:21:27,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 01:21:27,191 INFO L87 Difference]: Start difference. First operand 3186 states and 5594 transitions. Second operand 6 states. [2018-10-24 01:21:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:21:40,015 INFO L93 Difference]: Finished difference Result 11148 states and 19850 transitions. [2018-10-24 01:21:40,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 01:21:40,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2018-10-24 01:21:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:21:40,078 INFO L225 Difference]: With dead ends: 11148 [2018-10-24 01:21:40,078 INFO L226 Difference]: Without dead ends: 7968 [2018-10-24 01:21:40,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 01:21:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7968 states. [2018-10-24 01:21:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7968 to 7924. [2018-10-24 01:21:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7924 states. [2018-10-24 01:21:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7924 states to 7924 states and 13424 transitions. [2018-10-24 01:21:40,366 INFO L78 Accepts]: Start accepts. Automaton has 7924 states and 13424 transitions. Word has length 119 [2018-10-24 01:21:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:21:40,367 INFO L481 AbstractCegarLoop]: Abstraction has 7924 states and 13424 transitions. [2018-10-24 01:21:40,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 01:21:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7924 states and 13424 transitions. [2018-10-24 01:21:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-24 01:21:40,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:21:40,383 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, 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] [2018-10-24 01:21:40,383 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:21:40,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:21:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1525604427, now seen corresponding path program 1 times [2018-10-24 01:21:40,384 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:21:40,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:21:40,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:21:40,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:21:40,391 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:21:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:21:40,689 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 01:21:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 01:21:40,757 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 01:21:40,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 01:21:40,757 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:21:40,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 01:21:40,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 01:21:40,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 01:21:40,759 INFO L87 Difference]: Start difference. First operand 7924 states and 13424 transitions. Second operand 6 states. [2018-10-24 01:21:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:21:52,808 INFO L93 Difference]: Finished difference Result 22224 states and 38004 transitions. [2018-10-24 01:21:52,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 01:21:52,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2018-10-24 01:21:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:21:52,881 INFO L225 Difference]: With dead ends: 22224 [2018-10-24 01:21:52,882 INFO L226 Difference]: Without dead ends: 14306 [2018-10-24 01:21:52,921 INFO L605 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 [2018-10-24 01:21:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14306 states. [2018-10-24 01:21:53,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14306 to 14219. [2018-10-24 01:21:53,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14219 states. [2018-10-24 01:21:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14219 states to 14219 states and 21550 transitions. [2018-10-24 01:21:53,259 INFO L78 Accepts]: Start accepts. Automaton has 14219 states and 21550 transitions. Word has length 127 [2018-10-24 01:21:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:21:53,260 INFO L481 AbstractCegarLoop]: Abstraction has 14219 states and 21550 transitions. [2018-10-24 01:21:53,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 01:21:53,260 INFO L276 IsEmpty]: Start isEmpty. Operand 14219 states and 21550 transitions. [2018-10-24 01:21:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-24 01:21:53,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:21:53,264 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, 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] [2018-10-24 01:21:53,265 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:21:53,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:21:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash -654123146, now seen corresponding path program 1 times [2018-10-24 01:21:53,265 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:21:53,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:21:53,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:21:53,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:21:53,267 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:21:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:21:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 01:21:53,756 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 01:21:53,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 01:21:53,757 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:21:53,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 01:21:53,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 01:21:53,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 01:21:53,760 INFO L87 Difference]: Start difference. First operand 14219 states and 21550 transitions. Second operand 6 states. [2018-10-24 01:22:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:22:16,508 INFO L93 Difference]: Finished difference Result 56456 states and 95976 transitions. [2018-10-24 01:22:16,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 01:22:16,513 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2018-10-24 01:22:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:22:16,746 INFO L225 Difference]: With dead ends: 56456 [2018-10-24 01:22:16,746 INFO L226 Difference]: Without dead ends: 42243 [2018-10-24 01:22:16,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-24 01:22:16,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42243 states. [2018-10-24 01:22:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42243 to 42003. [2018-10-24 01:22:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42003 states. [2018-10-24 01:22:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42003 states to 42003 states and 62980 transitions. [2018-10-24 01:22:18,129 INFO L78 Accepts]: Start accepts. Automaton has 42003 states and 62980 transitions. Word has length 144 [2018-10-24 01:22:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:22:18,130 INFO L481 AbstractCegarLoop]: Abstraction has 42003 states and 62980 transitions. [2018-10-24 01:22:18,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 01:22:18,131 INFO L276 IsEmpty]: Start isEmpty. Operand 42003 states and 62980 transitions. [2018-10-24 01:22:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-24 01:22:18,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:22:18,137 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, 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] [2018-10-24 01:22:18,137 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:22:18,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:22:18,138 INFO L82 PathProgramCache]: Analyzing trace with hash -271525473, now seen corresponding path program 1 times [2018-10-24 01:22:18,138 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:22:18,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:22:18,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:22:18,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:22:18,140 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:22:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:22:18,402 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 01:22:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 01:22:18,850 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 01:22:18,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 01:22:18,850 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:22:18,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 01:22:18,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 01:22:18,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 01:22:18,851 INFO L87 Difference]: Start difference. First operand 42003 states and 62980 transitions. Second operand 6 states. [2018-10-24 01:22:29,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 01:22:29,695 INFO L93 Difference]: Finished difference Result 104625 states and 165914 transitions. [2018-10-24 01:22:29,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 01:22:29,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2018-10-24 01:22:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 01:22:29,916 INFO L225 Difference]: With dead ends: 104625 [2018-10-24 01:22:29,916 INFO L226 Difference]: Without dead ends: 62628 [2018-10-24 01:22:30,064 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 01:22:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62628 states. [2018-10-24 01:22:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62628 to 62378. [2018-10-24 01:22:31,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62378 states. [2018-10-24 01:22:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62378 states to 62378 states and 87792 transitions. [2018-10-24 01:22:31,442 INFO L78 Accepts]: Start accepts. Automaton has 62378 states and 87792 transitions. Word has length 165 [2018-10-24 01:22:31,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 01:22:31,443 INFO L481 AbstractCegarLoop]: Abstraction has 62378 states and 87792 transitions. [2018-10-24 01:22:31,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 01:22:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 62378 states and 87792 transitions. [2018-10-24 01:22:31,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-24 01:22:31,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 01:22:31,453 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 01:22:31,454 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 01:22:31,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:22:31,454 INFO L82 PathProgramCache]: Analyzing trace with hash 708461889, now seen corresponding path program 1 times [2018-10-24 01:22:31,454 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 01:22:31,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:22:31,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 01:22:31,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 01:22:31,456 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 01:22:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 01:22:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 66 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 01:22:31,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 01:22:31,803 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 01:22:31,804 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 200 with the following transitions: [2018-10-24 01:22:31,808 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], [2051], [2059], [2067], [2075], [2083], [2087], [2089], [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], [2396], [2397], [2400], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-24 01:22:31,935 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 01:22:31,935 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 01:22:34,697 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 01:22:34,888 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 01:22:34,890 INFO L272 AbstractInterpreter]: Visited 85 different actions 85 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-24 01:22:34,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 01:22:34,918 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 01:22:37,038 INFO L232 lantSequenceWeakener]: Weakened 191 states. On average, predicates are now at 75.52% of their original sizes. [2018-10-24 01:22:37,038 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 01:22:37,458 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 01:22:37,459 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 01:22:37,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2018-10-24 01:22:37,460 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 01:22:37,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 01:22:37,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 01:22:37,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 01:22:37,461 INFO L87 Difference]: Start difference. First operand 62378 states and 87792 transitions. Second operand 8 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown