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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label45_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 02:49:15,392 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 02:49:15,395 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 02:49:15,407 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 02:49:15,408 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 02:49:15,409 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 02:49:15,410 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 02:49:15,412 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 02:49:15,413 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 02:49:15,414 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 02:49:15,415 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 02:49:15,415 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 02:49:15,416 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 02:49:15,417 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 02:49:15,419 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 02:49:15,419 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 02:49:15,420 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 02:49:15,422 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 02:49:15,424 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 02:49:15,426 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 02:49:15,427 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 02:49:15,428 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 02:49:15,434 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 02:49:15,440 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 02:49:15,440 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 02:49:15,441 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 02:49:15,442 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 02:49:15,443 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-11-07 02:49:15,473 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 02:49:15,474 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 02:49:15,474 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 02:49:15,475 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 02:49:15,475 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 02:49:15,475 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 02:49:15,475 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 02:49:15,475 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 02:49:15,476 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 02:49:15,476 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 02:49:15,476 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 02:49:15,476 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 02:49:15,478 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 02:49:15,478 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 02:49:15,478 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 02:49:15,478 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 02:49:15,478 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 02:49:15,479 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 02:49:15,479 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 02:49:15,479 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 02:49:15,479 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 02:49:15,479 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 02:49:15,480 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 02:49:15,481 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 02:49:15,481 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 02:49:15,481 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 02:49:15,481 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 02:49:15,483 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 02:49:15,483 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 02:49:15,483 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 02:49:15,483 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 02:49:15,483 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 02:49:15,484 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 02:49:15,484 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 02:49:15,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 02:49:15,548 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 02:49:15,551 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 02:49:15,553 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 02:49:15,553 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 02:49:15,554 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label45_true-unreach-call.c [2018-11-07 02:49:15,620 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1766b153/5980809903b349f09cdc2f8e2e89eea5/FLAG6126d85a1 [2018-11-07 02:49:16,227 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 02:49:16,228 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label45_true-unreach-call.c [2018-11-07 02:49:16,253 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1766b153/5980809903b349f09cdc2f8e2e89eea5/FLAG6126d85a1 [2018-11-07 02:49:16,274 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1766b153/5980809903b349f09cdc2f8e2e89eea5 [2018-11-07 02:49:16,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 02:49:16,289 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 02:49:16,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 02:49:16,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 02:49:16,296 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 02:49:16,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:49:16" (1/1) ... [2018-11-07 02:49:16,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4688d22a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:16, skipping insertion in model container [2018-11-07 02:49:16,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:49:16" (1/1) ... [2018-11-07 02:49:16,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 02:49:16,385 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 02:49:16,812 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 02:49:16,817 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 02:49:17,043 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 02:49:17,060 INFO L193 MainTranslator]: Completed translation [2018-11-07 02:49:17,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:17 WrapperNode [2018-11-07 02:49:17,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 02:49:17,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 02:49:17,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 02:49:17,063 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 02:49:17,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:17" (1/1) ... [2018-11-07 02:49:17,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:17" (1/1) ... [2018-11-07 02:49:17,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 02:49:17,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 02:49:17,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 02:49:17,217 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 02:49:17,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:17" (1/1) ... [2018-11-07 02:49:17,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:17" (1/1) ... [2018-11-07 02:49:17,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:17" (1/1) ... [2018-11-07 02:49:17,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:17" (1/1) ... [2018-11-07 02:49:17,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:17" (1/1) ... [2018-11-07 02:49:17,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:17" (1/1) ... [2018-11-07 02:49:17,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:17" (1/1) ... [2018-11-07 02:49:17,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 02:49:17,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 02:49:17,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 02:49:17,329 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 02:49:17,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:17" (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 02:49:17,408 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 02:49:17,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 02:49:17,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 02:49:17,409 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 02:49:17,410 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 02:49:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 02:49:17,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 02:49:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 02:49:17,411 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 02:49:21,082 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 02:49:21,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:49:21 BoogieIcfgContainer [2018-11-07 02:49:21,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 02:49:21,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 02:49:21,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 02:49:21,091 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 02:49:21,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:49:16" (1/3) ... [2018-11-07 02:49:21,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e75b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:49:21, skipping insertion in model container [2018-11-07 02:49:21,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:17" (2/3) ... [2018-11-07 02:49:21,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e75b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:49:21, skipping insertion in model container [2018-11-07 02:49:21,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:49:21" (3/3) ... [2018-11-07 02:49:21,098 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label45_true-unreach-call.c [2018-11-07 02:49:21,113 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 02:49:21,128 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 02:49:21,157 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 02:49:21,211 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 02:49:21,211 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 02:49:21,211 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 02:49:21,212 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 02:49:21,212 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 02:49:21,212 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 02:49:21,213 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 02:49:21,213 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 02:49:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-11-07 02:49:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-07 02:49:21,269 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 02:49:21,271 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, 1, 1, 1, 1, 1] [2018-11-07 02:49:21,274 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 02:49:21,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:49:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2078467607, now seen corresponding path program 1 times [2018-11-07 02:49:21,284 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 02:49:21,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:49:21,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:49:21,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:49:21,339 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 02:49:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:49:21,757 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 02:49:21,785 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 02:49:21,788 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 02:49:21,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 02:49:21,789 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 02:49:21,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 02:49:21,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 02:49:21,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 02:49:21,815 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 3 states. [2018-11-07 02:49:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 02:49:23,601 INFO L93 Difference]: Finished difference Result 574 states and 992 transitions. [2018-11-07 02:49:23,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 02:49:23,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-11-07 02:49:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 02:49:23,622 INFO L225 Difference]: With dead ends: 574 [2018-11-07 02:49:23,623 INFO L226 Difference]: Without dead ends: 356 [2018-11-07 02:49:23,631 INFO L604 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 [2018-11-07 02:49:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-11-07 02:49:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2018-11-07 02:49:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-11-07 02:49:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 592 transitions. [2018-11-07 02:49:23,714 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 592 transitions. Word has length 45 [2018-11-07 02:49:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 02:49:23,715 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 592 transitions. [2018-11-07 02:49:23,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 02:49:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 592 transitions. [2018-11-07 02:49:23,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-07 02:49:23,723 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 02:49:23,724 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, 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] [2018-11-07 02:49:23,724 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 02:49:23,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:49:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2123203616, now seen corresponding path program 1 times [2018-11-07 02:49:23,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 02:49:23,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:49:23,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:49:23,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:49:23,727 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 02:49:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:49:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 02:49:24,044 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 02:49:24,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 02:49:24,045 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 02:49:24,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 02:49:24,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 02:49:24,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 02:49:24,048 INFO L87 Difference]: Start difference. First operand 356 states and 592 transitions. Second operand 6 states. [2018-11-07 02:49:26,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 02:49:26,412 INFO L93 Difference]: Finished difference Result 1002 states and 1689 transitions. [2018-11-07 02:49:26,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 02:49:26,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2018-11-07 02:49:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 02:49:26,419 INFO L225 Difference]: With dead ends: 1002 [2018-11-07 02:49:26,420 INFO L226 Difference]: Without dead ends: 652 [2018-11-07 02:49:26,428 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 02:49:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2018-11-07 02:49:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 640. [2018-11-07 02:49:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-11-07 02:49:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 960 transitions. [2018-11-07 02:49:26,477 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 960 transitions. Word has length 115 [2018-11-07 02:49:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 02:49:26,477 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 960 transitions. [2018-11-07 02:49:26,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 02:49:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 960 transitions. [2018-11-07 02:49:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-07 02:49:26,484 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 02:49:26,485 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, 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] [2018-11-07 02:49:26,485 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 02:49:26,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:49:26,486 INFO L82 PathProgramCache]: Analyzing trace with hash -597678124, now seen corresponding path program 1 times [2018-11-07 02:49:26,486 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 02:49:26,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:49:26,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:49:26,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:49:26,488 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 02:49:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:49:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 02:49:26,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 02:49:26,985 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 02:49:26,986 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 126 with the following transitions: [2018-11-07 02:49:26,988 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 02:49:27,059 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-07 02:49:27,059 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 02:49:29,696 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 02:49:41,341 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 02:49:41,343 INFO L272 AbstractInterpreter]: Visited 88 different actions 497 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 02:49:41,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:49:41,382 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 02:49:41,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 02:49:41,383 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 02:49:41,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:49:41,399 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 02:49:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:49:41,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 02:49:42,895 WARN L179 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 35 [2018-11-07 02:49:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 02:49:43,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 02:49:43,984 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2018-11-07 02:49:43,990 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:44,125 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:44,213 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:44,306 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:44,344 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:44,413 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:44,486 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:44,541 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:44,623 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:44,666 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:44,851 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:44,901 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:44,938 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,002 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,036 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,069 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,250 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,344 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,405 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,444 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,485 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,519 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,563 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,599 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,632 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,673 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,705 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,841 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,875 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,927 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:45,991 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,024 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,085 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,128 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,185 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,219 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,304 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,337 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,431 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,489 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,593 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,631 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,677 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,716 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:46,752 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:47,003 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:47,259 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:47,504 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:47,756 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:48,016 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:48,075 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:48,127 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:48,173 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:48,436 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:48,689 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:48,892 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:48,925 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,075 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,133 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,178 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,211 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,244 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,283 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,340 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,412 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,447 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,485 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,530 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,563 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,599 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,631 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,663 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 02:49:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 02:49:49,843 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 02:49:49,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-11-07 02:49:49,843 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 02:49:49,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 02:49:49,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 02:49:49,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2018-11-07 02:49:49,844 INFO L87 Difference]: Start difference. First operand 640 states and 960 transitions. Second operand 6 states. [2018-11-07 02:49:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 02:49:57,656 INFO L93 Difference]: Finished difference Result 2276 states and 3519 transitions. [2018-11-07 02:49:57,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 02:49:57,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-11-07 02:49:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 02:49:57,678 INFO L225 Difference]: With dead ends: 2276 [2018-11-07 02:49:57,678 INFO L226 Difference]: Without dead ends: 1642 [2018-11-07 02:49:57,685 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 73 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2018-11-07 02:49:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2018-11-07 02:49:57,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1632. [2018-11-07 02:49:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1632 states. [2018-11-07 02:49:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2326 transitions. [2018-11-07 02:49:57,778 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2326 transitions. Word has length 125 [2018-11-07 02:49:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 02:49:57,779 INFO L480 AbstractCegarLoop]: Abstraction has 1632 states and 2326 transitions. [2018-11-07 02:49:57,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 02:49:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2326 transitions. [2018-11-07 02:49:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-11-07 02:49:57,792 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 02:49:57,792 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, 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] [2018-11-07 02:49:57,792 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 02:49:57,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:49:57,793 INFO L82 PathProgramCache]: Analyzing trace with hash 786349999, now seen corresponding path program 1 times [2018-11-07 02:49:57,793 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 02:49:57,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:49:57,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:49:57,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:49:57,795 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 02:49:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:49:58,116 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 02:49:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 02:49:58,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 02:49:58,365 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 02:49:58,365 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 175 with the following transitions: [2018-11-07 02:49:58,366 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [730], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 02:49:58,381 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-07 02:49:58,381 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 02:50:00,844 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 02:50:00,844 INFO L272 AbstractInterpreter]: Visited 133 different actions 133 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 02:50:00,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:50:00,883 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 02:50:02,487 INFO L227 lantSequenceWeakener]: Weakened 169 states. On average, predicates are now at 73.45% of their original sizes. [2018-11-07 02:50:02,488 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 02:50:02,933 INFO L415 sIntCurrentIteration]: We unified 173 AI predicates to 173 [2018-11-07 02:50:02,934 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 02:50:02,934 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 02:50:02,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2018-11-07 02:50:02,935 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 02:50:02,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 02:50:02,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 02:50:02,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 02:50:02,936 INFO L87 Difference]: Start difference. First operand 1632 states and 2326 transitions. Second operand 7 states. [2018-11-07 02:50:04,924 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 02:50:29,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 02:50:29,457 INFO L93 Difference]: Finished difference Result 3404 states and 4880 transitions. [2018-11-07 02:50:29,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 02:50:29,458 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 174 [2018-11-07 02:50:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 02:50:29,469 INFO L225 Difference]: With dead ends: 3404 [2018-11-07 02:50:29,469 INFO L226 Difference]: Without dead ends: 1778 [2018-11-07 02:50:29,476 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 174 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 02:50:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2018-11-07 02:50:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1776. [2018-11-07 02:50:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1776 states. [2018-11-07 02:50:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 2479 transitions. [2018-11-07 02:50:29,531 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 2479 transitions. Word has length 174 [2018-11-07 02:50:29,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 02:50:29,531 INFO L480 AbstractCegarLoop]: Abstraction has 1776 states and 2479 transitions. [2018-11-07 02:50:29,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 02:50:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 2479 transitions. [2018-11-07 02:50:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-11-07 02:50:29,536 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 02:50:29,536 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 02:50:29,536 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 02:50:29,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:50:29,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1611504344, now seen corresponding path program 1 times [2018-11-07 02:50:29,537 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 02:50:29,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:50:29,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:50:29,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:50:29,538 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 02:50:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:50:29,831 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 02:50:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 02:50:30,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 02:50:30,020 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 02:50:30,020 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 184 with the following transitions: [2018-11-07 02:50:30,021 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [766], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 02:50:30,033 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-07 02:50:30,033 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 02:50:33,315 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 02:50:42,730 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 02:50:42,730 INFO L272 AbstractInterpreter]: Visited 145 different actions 422 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 02:50:42,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:50:42,732 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 02:50:45,064 INFO L227 lantSequenceWeakener]: Weakened 36 states. On average, predicates are now at 77.62% of their original sizes. [2018-11-07 02:50:45,064 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 02:51:14,552 INFO L415 sIntCurrentIteration]: We unified 182 AI predicates to 182 [2018-11-07 02:51:14,553 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 02:51:14,553 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 02:51:14,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [4] total 19 [2018-11-07 02:51:14,553 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 02:51:14,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 02:51:14,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 02:51:14,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-11-07 02:51:14,555 INFO L87 Difference]: Start difference. First operand 1776 states and 2479 transitions. Second operand 17 states. [2018-11-07 02:52:36,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 02:52:36,533 INFO L93 Difference]: Finished difference Result 3705 states and 5369 transitions. [2018-11-07 02:52:36,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-07 02:52:36,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 183 [2018-11-07 02:52:36,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 02:52:36,547 INFO L225 Difference]: With dead ends: 3705 [2018-11-07 02:52:36,547 INFO L226 Difference]: Without dead ends: 2079 [2018-11-07 02:52:36,556 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 189 GetRequests, 124 SyntacticMatches, 43 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-07 02:52:36,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2018-11-07 02:52:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 2072. [2018-11-07 02:52:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2072 states. [2018-11-07 02:52:36,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2814 transitions. [2018-11-07 02:52:36,704 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2814 transitions. Word has length 183 [2018-11-07 02:52:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 02:52:36,705 INFO L480 AbstractCegarLoop]: Abstraction has 2072 states and 2814 transitions. [2018-11-07 02:52:36,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 02:52:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2814 transitions. [2018-11-07 02:52:36,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-11-07 02:52:36,711 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 02:52:36,712 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 02:52:36,712 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 02:52:36,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:52:36,712 INFO L82 PathProgramCache]: Analyzing trace with hash -302493013, now seen corresponding path program 1 times [2018-11-07 02:52:36,712 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 02:52:36,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:52:36,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:52:36,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:52:36,714 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 02:52:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:52:37,205 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 02:52:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 02:52:37,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 02:52:37,556 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 02:52:37,556 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 212 with the following transitions: [2018-11-07 02:52:37,556 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [558], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 02:52:37,560 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-07 02:52:37,560 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 02:52:38,884 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 02:52:49,344 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 02:52:49,345 INFO L272 AbstractInterpreter]: Visited 95 different actions 539 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 02:52:49,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:52:49,353 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 02:52:49,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 02:52:49,353 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 02:52:49,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:52:49,363 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 02:52:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:52:49,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 02:52:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 02:52:49,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 02:52:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 02:52:49,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 02:52:49,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2018-11-07 02:52:49,713 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 02:52:49,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-07 02:52:49,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-07 02:52:49,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-11-07 02:52:49,714 INFO L87 Difference]: Start difference. First operand 2072 states and 2814 transitions. Second operand 14 states. [2018-11-07 02:52:50,295 WARN L179 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2018-11-07 02:52:56,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 02:52:56,534 INFO L93 Difference]: Finished difference Result 6692 states and 10199 transitions. [2018-11-07 02:52:56,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-07 02:52:56,535 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 211 [2018-11-07 02:52:56,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 02:52:56,553 INFO L225 Difference]: With dead ends: 6692 [2018-11-07 02:52:56,554 INFO L226 Difference]: Without dead ends: 2591 [2018-11-07 02:52:56,589 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 431 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=335, Invalid=925, Unknown=0, NotChecked=0, Total=1260 [2018-11-07 02:52:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2018-11-07 02:52:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2367. [2018-11-07 02:52:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2367 states. [2018-11-07 02:52:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 2869 transitions. [2018-11-07 02:52:56,776 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 2869 transitions. Word has length 211 [2018-11-07 02:52:56,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 02:52:56,776 INFO L480 AbstractCegarLoop]: Abstraction has 2367 states and 2869 transitions. [2018-11-07 02:52:56,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-07 02:52:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 2869 transitions. [2018-11-07 02:52:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-11-07 02:52:56,783 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 02:52:56,783 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:52:56,783 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 02:52:56,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 02:52:56,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1957137347, now seen corresponding path program 1 times [2018-11-07 02:52:56,784 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 02:52:56,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:52:56,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:52:56,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 02:52:56,785 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 02:52:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:52:57,085 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 02:52:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-07 02:52:57,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 02:52:57,301 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 02:52:57,301 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 246 with the following transitions: [2018-11-07 02:52:57,302 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [730], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 02:52:57,306 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-07 02:52:57,306 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 02:52:58,456 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-11-07 02:53:04,267 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-07 02:53:04,268 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-07 02:53:04,268 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 02:53:04,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 02:53:04,268 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 02:53:04,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 02:53:04,282 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 02:53:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 02:53:04,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 02:53:04,383 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 02:53:04,584 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 02:53:04,585 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 02:53:04,591 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 02:53:04,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:53:04 BoogieIcfgContainer [2018-11-07 02:53:04,592 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 02:53:04,593 INFO L168 Benchmark]: Toolchain (without parser) took 228304.58 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -703.9 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-07 02:53:04,594 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 02:53:04,595 INFO L168 Benchmark]: CACSL2BoogieTranslator took 770.66 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-11-07 02:53:04,595 INFO L168 Benchmark]: Boogie Procedure Inliner took 153.66 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -824.5 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2018-11-07 02:53:04,596 INFO L168 Benchmark]: Boogie Preprocessor took 111.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2018-11-07 02:53:04,597 INFO L168 Benchmark]: RCFGBuilder took 3755.82 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 103.7 MB). Peak memory consumption was 103.7 MB. Max. memory is 7.1 GB. [2018-11-07 02:53:04,598 INFO L168 Benchmark]: TraceAbstraction took 223506.44 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -28.4 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-11-07 02:53:04,606 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 770.66 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 153.66 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -824.5 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3755.82 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 103.7 MB). Peak memory consumption was 103.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 223506.44 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -28.4 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 118]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 118). Cancelled while BasicCegarLoop was analyzing trace of length 246 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 4 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 216 locations, 1 error locations. TIMEOUT Result, 223.3s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 127.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 815 SDtfs, 6168 SDslu, 967 SDs, 0 SdLazy, 7666 SolverSat, 2122 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 61.0s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 1105 GetRequests, 901 SyntacticMatches, 121 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 40.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2367occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 48.3s AbstIntTime, 5 AbstIntIterations, 2 AbstIntStrong, 0.9950347009593795 AbsIntWeakeningRatio, 0.11267605633802817 AbsIntAvgWeakeningVarsNumRemoved, 477.37746478873237 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 6 MinimizatonAttempts, 255 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 11.1s InterpolantComputationTime, 1189 NumberOfCodeBlocks, 1189 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 1515 ConstructedInterpolants, 124 QuantifiedInterpolants, 1947992 SizeOfPredicates, 3 NumberOfNonLiveVariables, 651 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 571/696 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown