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/loop-invgen/SpamAssassin-loop_true-unreach-call_false-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:14:50,409 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:14:50,411 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:14:50,423 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:14:50,424 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:14:50,425 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:14:50,426 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:14:50,428 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:14:50,429 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:14:50,430 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:14:50,431 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:14:50,431 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:14:50,432 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:14:50,433 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:14:50,434 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:14:50,435 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:14:50,436 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:14:50,438 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:14:50,439 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:14:50,441 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:14:50,442 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:14:50,443 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:14:50,446 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 12:14:50,446 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 12:14:50,446 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 12:14:50,447 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 12:14:50,450 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 12:14:50,451 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 12:14:50,452 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 12:14:50,454 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 12:14:50,454 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 12:14:50,455 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 12:14:50,459 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 12:14:50,484 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:14:50,484 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:14:50,485 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:14:50,485 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:14:50,486 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:14:50,486 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:14:50,487 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:14:50,487 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:14:50,487 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:14:50,487 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:14:50,487 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:14:50,488 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:14:50,488 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:14:50,488 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:14:50,489 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:14:50,490 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:14:50,490 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:14:50,490 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:14:50,490 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:14:50,490 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:14:50,491 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:14:50,492 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:14:50,492 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:14:50,492 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:14:50,492 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:14:50,492 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:14:50,493 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:14:50,493 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:14:50,493 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:14:50,493 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:14:50,493 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:14:50,494 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:14:50,494 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:14:50,494 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:14:50,543 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:14:50,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:14:50,562 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:14:50,563 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:14:50,564 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:14:50,564 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop_true-unreach-call_false-termination.i [2018-10-24 12:14:50,614 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/752bc04c5/6cf16a568c4243ffbb49b162a41b662c/FLAG8a57730ea [2018-10-24 12:14:51,054 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:14:51,054 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop_true-unreach-call_false-termination.i [2018-10-24 12:14:51,065 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/752bc04c5/6cf16a568c4243ffbb49b162a41b662c/FLAG8a57730ea [2018-10-24 12:14:51,079 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/752bc04c5/6cf16a568c4243ffbb49b162a41b662c [2018-10-24 12:14:51,090 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:14:51,091 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:14:51,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:14:51,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:14:51,096 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:14:51,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:14:51" (1/1) ... [2018-10-24 12:14:51,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de7335f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51, skipping insertion in model container [2018-10-24 12:14:51,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:14:51" (1/1) ... [2018-10-24 12:14:51,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:14:51,140 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:14:51,333 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:14:51,340 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:14:51,366 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:14:51,382 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:14:51,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51 WrapperNode [2018-10-24 12:14:51,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:14:51,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:14:51,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:14:51,384 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:14:51,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51" (1/1) ... [2018-10-24 12:14:51,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51" (1/1) ... [2018-10-24 12:14:51,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:14:51,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:14:51,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:14:51,407 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:14:51,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51" (1/1) ... [2018-10-24 12:14:51,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51" (1/1) ... [2018-10-24 12:14:51,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51" (1/1) ... [2018-10-24 12:14:51,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51" (1/1) ... [2018-10-24 12:14:51,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51" (1/1) ... [2018-10-24 12:14:51,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51" (1/1) ... [2018-10-24 12:14:51,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51" (1/1) ... [2018-10-24 12:14:51,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:14:51,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:14:51,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:14:51,433 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:14:51,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51" (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 12:14:51,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:14:51,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:14:51,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:14:51,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:14:51,594 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:14:51,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:14:51,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:14:51,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:14:52,060 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:14:52,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:14:52 BoogieIcfgContainer [2018-10-24 12:14:52,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:14:52,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:14:52,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:14:52,068 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:14:52,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:14:51" (1/3) ... [2018-10-24 12:14:52,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79160051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:14:52, skipping insertion in model container [2018-10-24 12:14:52,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:14:51" (2/3) ... [2018-10-24 12:14:52,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79160051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:14:52, skipping insertion in model container [2018-10-24 12:14:52,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:14:52" (3/3) ... [2018-10-24 12:14:52,073 INFO L112 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop_true-unreach-call_false-termination.i [2018-10-24 12:14:52,082 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:14:52,090 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:14:52,107 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:14:52,140 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:14:52,140 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:14:52,141 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:14:52,141 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:14:52,141 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:14:52,141 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:14:52,141 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:14:52,142 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:14:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-10-24 12:14:52,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 12:14:52,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:14:52,169 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:14:52,171 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:14:52,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:14:52,178 INFO L82 PathProgramCache]: Analyzing trace with hash -372910930, now seen corresponding path program 1 times [2018-10-24 12:14:52,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:14:52,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:14:52,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:14:52,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:14:52,231 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:14:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:14:52,415 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 12:14:52,418 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:14:52,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 12:14:52,418 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:14:52,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:14:52,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:14:52,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:14:52,441 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 5 states. [2018-10-24 12:14:52,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:14:52,906 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2018-10-24 12:14:52,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:14:52,908 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-24 12:14:52,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:14:52,918 INFO L225 Difference]: With dead ends: 90 [2018-10-24 12:14:52,919 INFO L226 Difference]: Without dead ends: 47 [2018-10-24 12:14:52,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:14:52,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-24 12:14:52,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-10-24 12:14:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-24 12:14:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2018-10-24 12:14:52,978 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 15 [2018-10-24 12:14:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:14:52,978 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2018-10-24 12:14:52,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:14:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2018-10-24 12:14:52,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 12:14:52,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:14:52,980 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:14:52,981 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:14:52,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:14:52,982 INFO L82 PathProgramCache]: Analyzing trace with hash -394866897, now seen corresponding path program 1 times [2018-10-24 12:14:52,982 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:14:52,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:14:52,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:14:52,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:14:52,983 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:14:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:14:53,107 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 12:14:53,108 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:14:53,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 12:14:53,108 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:14:53,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:14:53,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:14:53,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:14:53,111 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand 5 states. [2018-10-24 12:14:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:14:53,258 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2018-10-24 12:14:53,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:14:53,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-24 12:14:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:14:53,261 INFO L225 Difference]: With dead ends: 58 [2018-10-24 12:14:53,261 INFO L226 Difference]: Without dead ends: 56 [2018-10-24 12:14:53,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:14:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-24 12:14:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2018-10-24 12:14:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-24 12:14:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2018-10-24 12:14:53,280 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 15 [2018-10-24 12:14:53,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:14:53,280 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2018-10-24 12:14:53,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:14:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2018-10-24 12:14:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 12:14:53,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:14:53,282 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:14:53,282 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:14:53,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:14:53,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1825950327, now seen corresponding path program 1 times [2018-10-24 12:14:53,283 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:14:53,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:14:53,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:14:53,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:14:53,284 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:14:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:14:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:14:53,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:14:53,475 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:14:53,476 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-10-24 12:14:53,478 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [52], [68], [71], [73], [76], [78], [79], [80], [81], [107], [108], [109] [2018-10-24 12:14:53,526 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:14:53,527 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:14:53,671 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:14:53,672 INFO L272 AbstractInterpreter]: Visited 18 different actions 22 times. Never merged. Never widened. Never found a fixpoint. Largest state had 7 variables. [2018-10-24 12:14:53,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:14:53,693 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:14:53,816 INFO L232 lantSequenceWeakener]: Weakened 11 states. On average, predicates are now at 53.64% of their original sizes. [2018-10-24 12:14:53,816 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:14:54,158 INFO L413 sIntCurrentIteration]: We have 19 unified AI predicates [2018-10-24 12:14:54,158 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:14:54,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:14:54,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-10-24 12:14:54,160 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:14:54,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 12:14:54,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 12:14:54,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:14:54,161 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand 10 states. [2018-10-24 12:14:55,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:14:55,814 INFO L93 Difference]: Finished difference Result 92 states and 122 transitions. [2018-10-24 12:14:55,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 12:14:55,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-24 12:14:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:14:55,819 INFO L225 Difference]: With dead ends: 92 [2018-10-24 12:14:55,819 INFO L226 Difference]: Without dead ends: 90 [2018-10-24 12:14:55,820 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2018-10-24 12:14:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-24 12:14:55,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2018-10-24 12:14:55,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-24 12:14:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2018-10-24 12:14:55,847 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 20 [2018-10-24 12:14:55,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:14:55,848 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2018-10-24 12:14:55,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 12:14:55,848 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2018-10-24 12:14:55,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-24 12:14:55,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:14:55,849 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:14:55,850 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:14:55,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:14:55,850 INFO L82 PathProgramCache]: Analyzing trace with hash -443407858, now seen corresponding path program 1 times [2018-10-24 12:14:55,851 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:14:55,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:14:55,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:14:55,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:14:55,852 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:14:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:14:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-24 12:14:56,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:14:56,072 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:14:56,072 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-10-24 12:14:56,072 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [52], [68], [71], [73], [76], [78], [79], [80], [81], [107], [108], [109], [110], [111] [2018-10-24 12:14:56,074 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:14:56,074 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:14:56,105 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:14:56,105 INFO L272 AbstractInterpreter]: Visited 20 different actions 28 times. Never merged. Never widened. Never found a fixpoint. Largest state had 7 variables. [2018-10-24 12:14:56,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:14:56,114 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:14:56,153 INFO L232 lantSequenceWeakener]: Weakened 11 states. On average, predicates are now at 62.73% of their original sizes. [2018-10-24 12:14:56,154 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:14:56,498 INFO L413 sIntCurrentIteration]: We have 24 unified AI predicates [2018-10-24 12:14:56,498 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:14:56,498 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:14:56,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 18 [2018-10-24 12:14:56,500 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:14:56,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 12:14:56,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 12:14:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-10-24 12:14:56,501 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand 11 states. [2018-10-24 12:14:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:14:58,294 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2018-10-24 12:14:58,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 12:14:58,295 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2018-10-24 12:14:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:14:58,297 INFO L225 Difference]: With dead ends: 96 [2018-10-24 12:14:58,297 INFO L226 Difference]: Without dead ends: 94 [2018-10-24 12:14:58,298 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2018-10-24 12:14:58,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-24 12:14:58,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2018-10-24 12:14:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-24 12:14:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 112 transitions. [2018-10-24 12:14:58,325 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 112 transitions. Word has length 25 [2018-10-24 12:14:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:14:58,325 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 112 transitions. [2018-10-24 12:14:58,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 12:14:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 112 transitions. [2018-10-24 12:14:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-24 12:14:58,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:14:58,327 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:14:58,328 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:14:58,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:14:58,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2114615578, now seen corresponding path program 1 times [2018-10-24 12:14:58,328 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:14:58,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:14:58,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:14:58,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:14:58,330 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:14:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:14:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-24 12:14:58,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:14:58,481 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:14:58,481 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 45 with the following transitions: [2018-10-24 12:14:58,482 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [52], [58], [68], [71], [73], [76], [78], [79], [80], [81], [107], [108], [109], [110], [111], [112], [113], [114] [2018-10-24 12:14:58,484 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:14:58,484 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:14:58,503 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:14:58,504 INFO L272 AbstractInterpreter]: Visited 24 different actions 38 times. Merged at 2 different actions 2 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 9 variables. [2018-10-24 12:14:58,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:14:58,523 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:14:58,616 INFO L232 lantSequenceWeakener]: Weakened 23 states. On average, predicates are now at 68.7% of their original sizes. [2018-10-24 12:14:58,616 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:14:59,209 INFO L413 sIntCurrentIteration]: We have 43 unified AI predicates [2018-10-24 12:14:59,210 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:14:59,210 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:14:59,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2018-10-24 12:14:59,211 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:14:59,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 12:14:59,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 12:14:59,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2018-10-24 12:14:59,213 INFO L87 Difference]: Start difference. First operand 86 states and 112 transitions. Second operand 14 states. [2018-10-24 12:15:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:15:00,430 INFO L93 Difference]: Finished difference Result 133 states and 177 transitions. [2018-10-24 12:15:00,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 12:15:00,430 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-10-24 12:15:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:15:00,433 INFO L225 Difference]: With dead ends: 133 [2018-10-24 12:15:00,433 INFO L226 Difference]: Without dead ends: 131 [2018-10-24 12:15:00,434 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-10-24 12:15:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-24 12:15:00,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2018-10-24 12:15:00,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-24 12:15:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 166 transitions. [2018-10-24 12:15:00,486 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 166 transitions. Word has length 44 [2018-10-24 12:15:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:15:00,487 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 166 transitions. [2018-10-24 12:15:00,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 12:15:00,487 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 166 transitions. [2018-10-24 12:15:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-24 12:15:00,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:15:00,491 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 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 12:15:00,492 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:15:00,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:00,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1255310588, now seen corresponding path program 1 times [2018-10-24 12:15:00,492 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:15:00,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:00,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:15:00,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:00,497 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:15:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:15:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-24 12:15:00,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:15:00,696 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:15:00,697 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 49 with the following transitions: [2018-10-24 12:15:00,697 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [29], [32], [37], [42], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95] [2018-10-24 12:15:00,699 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:15:00,699 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:15:00,722 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:15:00,722 INFO L272 AbstractInterpreter]: Visited 31 different actions 55 times. Never merged. Never widened. Never found a fixpoint. Largest state had 10 variables. [2018-10-24 12:15:00,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:00,747 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:15:00,832 INFO L232 lantSequenceWeakener]: Weakened 30 states. On average, predicates are now at 61.56% of their original sizes. [2018-10-24 12:15:00,832 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:15:01,214 INFO L413 sIntCurrentIteration]: We have 47 unified AI predicates [2018-10-24 12:15:01,214 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:15:01,214 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:15:01,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 17 [2018-10-24 12:15:01,215 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:15:01,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 12:15:01,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 12:15:01,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-10-24 12:15:01,216 INFO L87 Difference]: Start difference. First operand 123 states and 166 transitions. Second operand 12 states. [2018-10-24 12:15:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:15:05,447 INFO L93 Difference]: Finished difference Result 171 states and 228 transitions. [2018-10-24 12:15:05,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 12:15:05,447 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-10-24 12:15:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:15:05,450 INFO L225 Difference]: With dead ends: 171 [2018-10-24 12:15:05,450 INFO L226 Difference]: Without dead ends: 169 [2018-10-24 12:15:05,452 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-10-24 12:15:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-24 12:15:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2018-10-24 12:15:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-24 12:15:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 208 transitions. [2018-10-24 12:15:05,505 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 208 transitions. Word has length 48 [2018-10-24 12:15:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:15:05,505 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 208 transitions. [2018-10-24 12:15:05,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 12:15:05,506 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 208 transitions. [2018-10-24 12:15:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-24 12:15:05,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:15:05,509 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:15:05,509 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:15:05,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:05,509 INFO L82 PathProgramCache]: Analyzing trace with hash -979286812, now seen corresponding path program 1 times [2018-10-24 12:15:05,509 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:15:05,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:05,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:15:05,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:05,511 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:15:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:15:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-10-24 12:15:06,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:15:06,283 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:15:06,284 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 59 with the following transitions: [2018-10-24 12:15:06,284 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [29], [32], [37], [42], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95], [96], [97], [98], [99] [2018-10-24 12:15:06,286 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:15:06,286 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:15:06,306 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:15:06,306 INFO L272 AbstractInterpreter]: Visited 35 different actions 67 times. Never merged. Never widened. Never found a fixpoint. Largest state had 10 variables. [2018-10-24 12:15:06,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:06,343 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:15:06,390 INFO L232 lantSequenceWeakener]: Weakened 38 states. On average, predicates are now at 62.28% of their original sizes. [2018-10-24 12:15:06,391 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:15:07,779 INFO L413 sIntCurrentIteration]: We have 57 unified AI predicates [2018-10-24 12:15:07,779 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:15:07,779 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:15:07,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 20 [2018-10-24 12:15:07,780 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:15:07,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 12:15:07,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 12:15:07,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-10-24 12:15:07,781 INFO L87 Difference]: Start difference. First operand 157 states and 208 transitions. Second operand 13 states. [2018-10-24 12:15:13,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:15:13,991 INFO L93 Difference]: Finished difference Result 229 states and 308 transitions. [2018-10-24 12:15:13,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 12:15:13,991 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-10-24 12:15:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:15:13,995 INFO L225 Difference]: With dead ends: 229 [2018-10-24 12:15:13,995 INFO L226 Difference]: Without dead ends: 227 [2018-10-24 12:15:13,996 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-10-24 12:15:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-24 12:15:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 191. [2018-10-24 12:15:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-24 12:15:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 254 transitions. [2018-10-24 12:15:14,041 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 254 transitions. Word has length 58 [2018-10-24 12:15:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:15:14,041 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 254 transitions. [2018-10-24 12:15:14,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 12:15:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 254 transitions. [2018-10-24 12:15:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-24 12:15:14,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:15:14,045 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 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] [2018-10-24 12:15:14,045 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:15:14,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:14,045 INFO L82 PathProgramCache]: Analyzing trace with hash 377935603, now seen corresponding path program 1 times [2018-10-24 12:15:14,046 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:15:14,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:14,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:15:14,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:14,047 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:15:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:15:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-10-24 12:15:14,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:15:14,165 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:15:14,165 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 66 with the following transitions: [2018-10-24 12:15:14,165 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [24], [26], [29], [32], [35], [52], [58], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [107], [108], [109], [110], [111], [112], [113], [114] [2018-10-24 12:15:14,168 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:15:14,168 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:15:14,580 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:15:14,580 INFO L272 AbstractInterpreter]: Visited 32 different actions 1158 times. Merged at 16 different actions 301 times. Widened at 3 different actions 25 times. Found 38 fixpoints after 6 different actions. Largest state had 10 variables. [2018-10-24 12:15:14,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:14,606 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:15:14,666 INFO L232 lantSequenceWeakener]: Weakened 29 states. On average, predicates are now at 75.52% of their original sizes. [2018-10-24 12:15:14,666 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:15:14,941 INFO L413 sIntCurrentIteration]: We have 64 unified AI predicates [2018-10-24 12:15:14,942 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:15:14,942 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:15:14,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 19 [2018-10-24 12:15:14,943 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:15:14,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 12:15:14,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 12:15:14,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2018-10-24 12:15:14,944 INFO L87 Difference]: Start difference. First operand 191 states and 254 transitions. Second operand 13 states. [2018-10-24 12:15:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:15:17,207 INFO L93 Difference]: Finished difference Result 252 states and 334 transitions. [2018-10-24 12:15:17,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 12:15:17,207 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2018-10-24 12:15:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:15:17,212 INFO L225 Difference]: With dead ends: 252 [2018-10-24 12:15:17,212 INFO L226 Difference]: Without dead ends: 250 [2018-10-24 12:15:17,213 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-10-24 12:15:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-10-24 12:15:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 239. [2018-10-24 12:15:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-24 12:15:17,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 314 transitions. [2018-10-24 12:15:17,296 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 314 transitions. Word has length 65 [2018-10-24 12:15:17,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:15:17,296 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 314 transitions. [2018-10-24 12:15:17,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 12:15:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 314 transitions. [2018-10-24 12:15:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-24 12:15:17,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:15:17,300 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:15:17,301 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:15:17,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:17,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2026132663, now seen corresponding path program 1 times [2018-10-24 12:15:17,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:15:17,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:17,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:15:17,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:17,305 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:15:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:15:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-24 12:15:17,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:15:17,471 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:15:17,471 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 70 with the following transitions: [2018-10-24 12:15:17,472 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [29], [32], [37], [42], [47], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95], [96], [97], [98], [99], [100], [101], [102], [103] [2018-10-24 12:15:17,474 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:15:17,474 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:15:17,499 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:15:17,499 INFO L272 AbstractInterpreter]: Visited 40 different actions 80 times. Never merged. Never widened. Never found a fixpoint. Largest state had 12 variables. [2018-10-24 12:15:17,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:17,509 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:15:17,558 INFO L232 lantSequenceWeakener]: Weakened 47 states. On average, predicates are now at 63.55% of their original sizes. [2018-10-24 12:15:17,558 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:15:17,790 INFO L413 sIntCurrentIteration]: We have 68 unified AI predicates [2018-10-24 12:15:17,790 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:15:17,791 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:15:17,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [10] total 21 [2018-10-24 12:15:17,791 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:15:17,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 12:15:17,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 12:15:17,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-10-24 12:15:17,792 INFO L87 Difference]: Start difference. First operand 239 states and 314 transitions. Second operand 13 states. [2018-10-24 12:15:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:15:22,642 INFO L93 Difference]: Finished difference Result 335 states and 461 transitions. [2018-10-24 12:15:22,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 12:15:22,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-10-24 12:15:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:15:22,647 INFO L225 Difference]: With dead ends: 335 [2018-10-24 12:15:22,647 INFO L226 Difference]: Without dead ends: 333 [2018-10-24 12:15:22,648 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-10-24 12:15:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-10-24 12:15:22,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 316. [2018-10-24 12:15:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-24 12:15:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 442 transitions. [2018-10-24 12:15:22,742 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 442 transitions. Word has length 69 [2018-10-24 12:15:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:15:22,743 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 442 transitions. [2018-10-24 12:15:22,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 12:15:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 442 transitions. [2018-10-24 12:15:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-24 12:15:22,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:15:22,745 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2018-10-24 12:15:22,745 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:15:22,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:22,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1267705639, now seen corresponding path program 1 times [2018-10-24 12:15:22,746 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:15:22,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:22,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:15:22,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:22,747 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:15:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:15:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-24 12:15:22,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:15:22,900 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:15:22,900 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 73 with the following transitions: [2018-10-24 12:15:22,900 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [29], [32], [37], [42], [52], [58], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95], [107], [108], [109], [110], [111], [112], [113], [114] [2018-10-24 12:15:22,902 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:15:22,902 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:15:22,920 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:15:22,921 INFO L272 AbstractInterpreter]: Visited 41 different actions 83 times. Merged at 2 different actions 2 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 12 variables. [2018-10-24 12:15:22,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:22,945 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:15:23,000 INFO L232 lantSequenceWeakener]: Weakened 42 states. On average, predicates are now at 67.78% of their original sizes. [2018-10-24 12:15:23,001 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:15:23,308 INFO L413 sIntCurrentIteration]: We have 71 unified AI predicates [2018-10-24 12:15:23,308 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:15:23,309 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:15:23,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2018-10-24 12:15:23,309 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:15:23,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 12:15:23,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 12:15:23,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-10-24 12:15:23,310 INFO L87 Difference]: Start difference. First operand 316 states and 442 transitions. Second operand 14 states. [2018-10-24 12:15:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:15:27,860 INFO L93 Difference]: Finished difference Result 393 states and 551 transitions. [2018-10-24 12:15:27,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 12:15:27,860 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2018-10-24 12:15:27,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:15:27,863 INFO L225 Difference]: With dead ends: 393 [2018-10-24 12:15:27,863 INFO L226 Difference]: Without dead ends: 391 [2018-10-24 12:15:27,864 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2018-10-24 12:15:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-10-24 12:15:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 370. [2018-10-24 12:15:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2018-10-24 12:15:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 515 transitions. [2018-10-24 12:15:27,965 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 515 transitions. Word has length 72 [2018-10-24 12:15:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:15:27,965 INFO L481 AbstractCegarLoop]: Abstraction has 370 states and 515 transitions. [2018-10-24 12:15:27,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 12:15:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 515 transitions. [2018-10-24 12:15:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-24 12:15:27,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:15:27,969 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2018-10-24 12:15:27,969 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:15:27,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:27,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1889944727, now seen corresponding path program 1 times [2018-10-24 12:15:27,969 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:15:27,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:27,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:15:27,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:27,971 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:15:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:15:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2018-10-24 12:15:28,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:15:28,104 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:15:28,104 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 85 with the following transitions: [2018-10-24 12:15:28,104 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [29], [32], [35], [37], [42], [58], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95], [107], [108], [109], [110], [111], [112], [113], [114] [2018-10-24 12:15:28,106 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:15:28,106 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:15:28,233 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:15:28,234 INFO L272 AbstractInterpreter]: Visited 41 different actions 592 times. Merged at 18 different actions 126 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 12 variables. [2018-10-24 12:15:28,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:28,270 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:15:28,335 INFO L232 lantSequenceWeakener]: Weakened 48 states. On average, predicates are now at 69.72% of their original sizes. [2018-10-24 12:15:28,335 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:15:28,716 INFO L413 sIntCurrentIteration]: We have 83 unified AI predicates [2018-10-24 12:15:28,716 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:15:28,716 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:15:28,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [7] total 20 [2018-10-24 12:15:28,717 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:15:28,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 12:15:28,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 12:15:28,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-10-24 12:15:28,718 INFO L87 Difference]: Start difference. First operand 370 states and 515 transitions. Second operand 15 states. [2018-10-24 12:15:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:15:33,339 INFO L93 Difference]: Finished difference Result 474 states and 670 transitions. [2018-10-24 12:15:33,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 12:15:33,339 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2018-10-24 12:15:33,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:15:33,343 INFO L225 Difference]: With dead ends: 474 [2018-10-24 12:15:33,343 INFO L226 Difference]: Without dead ends: 472 [2018-10-24 12:15:33,344 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2018-10-24 12:15:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2018-10-24 12:15:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 458. [2018-10-24 12:15:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2018-10-24 12:15:33,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 650 transitions. [2018-10-24 12:15:33,506 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 650 transitions. Word has length 84 [2018-10-24 12:15:33,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:15:33,507 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 650 transitions. [2018-10-24 12:15:33,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 12:15:33,507 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 650 transitions. [2018-10-24 12:15:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-24 12:15:33,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:15:33,510 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 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] [2018-10-24 12:15:33,510 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:15:33,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:33,511 INFO L82 PathProgramCache]: Analyzing trace with hash 532621103, now seen corresponding path program 1 times [2018-10-24 12:15:33,511 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:15:33,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:33,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:15:33,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:33,512 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:15:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:15:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-10-24 12:15:33,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:15:33,706 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:15:33,706 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 87 with the following transitions: [2018-10-24 12:15:33,706 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [24], [26], [29], [32], [37], [42], [52], [58], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95], [96], [97], [98], [99], [107], [108], [109], [110], [111], [112], [113], [114] [2018-10-24 12:15:33,708 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:15:33,708 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:15:33,726 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:15:33,726 INFO L272 AbstractInterpreter]: Visited 46 different actions 99 times. Merged at 4 different actions 4 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 12 variables. [2018-10-24 12:15:33,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:33,761 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:15:33,820 INFO L232 lantSequenceWeakener]: Weakened 54 states. On average, predicates are now at 63.83% of their original sizes. [2018-10-24 12:15:33,820 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:15:34,125 INFO L413 sIntCurrentIteration]: We have 85 unified AI predicates [2018-10-24 12:15:34,125 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:15:34,125 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:15:34,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [8] total 21 [2018-10-24 12:15:34,125 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:15:34,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 12:15:34,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 12:15:34,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-10-24 12:15:34,126 INFO L87 Difference]: Start difference. First operand 458 states and 650 transitions. Second operand 15 states. [2018-10-24 12:15:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:15:37,559 INFO L93 Difference]: Finished difference Result 562 states and 786 transitions. [2018-10-24 12:15:37,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 12:15:37,559 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 86 [2018-10-24 12:15:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:15:37,562 INFO L225 Difference]: With dead ends: 562 [2018-10-24 12:15:37,562 INFO L226 Difference]: Without dead ends: 320 [2018-10-24 12:15:37,565 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-10-24 12:15:37,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-10-24 12:15:37,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 316. [2018-10-24 12:15:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-24 12:15:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 436 transitions. [2018-10-24 12:15:37,648 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 436 transitions. Word has length 86 [2018-10-24 12:15:37,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:15:37,648 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 436 transitions. [2018-10-24 12:15:37,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 12:15:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 436 transitions. [2018-10-24 12:15:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-24 12:15:37,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:15:37,650 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 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] [2018-10-24 12:15:37,650 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:15:37,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:37,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1428285441, now seen corresponding path program 1 times [2018-10-24 12:15:37,651 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:15:37,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:37,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:15:37,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:37,652 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:15:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:15:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 45 proven. 50 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2018-10-24 12:15:37,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:15:37,850 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:15:37,850 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 89 with the following transitions: [2018-10-24 12:15:37,850 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [26], [29], [32], [37], [42], [47], [50], [52], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95], [96], [97], [98], [99], [100], [101], [102], [103], [104], [105], [106], [107], [108], [109] [2018-10-24 12:15:37,852 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:15:37,852 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:15:37,991 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:15:37,991 INFO L272 AbstractInterpreter]: Visited 48 different actions 652 times. Merged at 22 different actions 132 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 13 variables. [2018-10-24 12:15:37,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:37,994 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:15:38,050 INFO L232 lantSequenceWeakener]: Weakened 47 states. On average, predicates are now at 76.17% of their original sizes. [2018-10-24 12:15:38,050 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:15:38,423 INFO L413 sIntCurrentIteration]: We have 87 unified AI predicates [2018-10-24 12:15:38,424 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:15:38,424 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:15:38,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [8] total 23 [2018-10-24 12:15:38,424 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:15:38,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 12:15:38,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 12:15:38,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-10-24 12:15:38,426 INFO L87 Difference]: Start difference. First operand 316 states and 436 transitions. Second operand 17 states. [2018-10-24 12:15:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:15:46,608 INFO L93 Difference]: Finished difference Result 502 states and 705 transitions. [2018-10-24 12:15:46,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 12:15:46,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2018-10-24 12:15:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:15:46,612 INFO L225 Difference]: With dead ends: 502 [2018-10-24 12:15:46,612 INFO L226 Difference]: Without dead ends: 500 [2018-10-24 12:15:46,613 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=287, Invalid=903, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 12:15:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2018-10-24 12:15:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 382. [2018-10-24 12:15:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2018-10-24 12:15:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 522 transitions. [2018-10-24 12:15:46,764 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 522 transitions. Word has length 88 [2018-10-24 12:15:46,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:15:46,765 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 522 transitions. [2018-10-24 12:15:46,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 12:15:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 522 transitions. [2018-10-24 12:15:46,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-24 12:15:46,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:15:46,767 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 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] [2018-10-24 12:15:46,767 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:15:46,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:46,767 INFO L82 PathProgramCache]: Analyzing trace with hash 932385919, now seen corresponding path program 1 times [2018-10-24 12:15:46,767 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:15:46,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:46,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:15:46,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:46,768 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:15:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:15:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2018-10-24 12:15:46,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:15:46,903 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:15:46,903 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 89 with the following transitions: [2018-10-24 12:15:46,903 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [24], [26], [29], [32], [35], [37], [42], [58], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95], [107], [108], [109], [110], [111], [112], [113], [114] [2018-10-24 12:15:46,904 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:15:46,904 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:15:47,234 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:15:47,234 INFO L272 AbstractInterpreter]: Visited 42 different actions 1368 times. Merged at 21 different actions 334 times. Widened at 3 different actions 23 times. Found 19 fixpoints after 3 different actions. Largest state had 12 variables. [2018-10-24 12:15:47,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:47,270 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:15:47,331 INFO L232 lantSequenceWeakener]: Weakened 48 states. On average, predicates are now at 69.72% of their original sizes. [2018-10-24 12:15:47,331 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:15:48,007 INFO L413 sIntCurrentIteration]: We have 87 unified AI predicates [2018-10-24 12:15:48,007 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:15:48,007 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:15:48,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [7] total 20 [2018-10-24 12:15:48,008 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:15:48,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 12:15:48,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 12:15:48,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-10-24 12:15:48,009 INFO L87 Difference]: Start difference. First operand 382 states and 522 transitions. Second operand 15 states. [2018-10-24 12:15:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:15:50,568 INFO L93 Difference]: Finished difference Result 504 states and 705 transitions. [2018-10-24 12:15:50,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 12:15:50,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 88 [2018-10-24 12:15:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:15:50,571 INFO L225 Difference]: With dead ends: 504 [2018-10-24 12:15:50,571 INFO L226 Difference]: Without dead ends: 502 [2018-10-24 12:15:50,571 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2018-10-24 12:15:50,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2018-10-24 12:15:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 460. [2018-10-24 12:15:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-10-24 12:15:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 636 transitions. [2018-10-24 12:15:50,747 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 636 transitions. Word has length 88 [2018-10-24 12:15:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:15:50,747 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 636 transitions. [2018-10-24 12:15:50,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 12:15:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 636 transitions. [2018-10-24 12:15:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-24 12:15:50,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:15:50,750 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:15:50,750 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:15:50,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:50,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1245277849, now seen corresponding path program 1 times [2018-10-24 12:15:50,750 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:15:50,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:50,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:15:50,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:15:50,752 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:15:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:15:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 49 proven. 50 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-10-24 12:15:51,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:15:51,372 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:15:51,372 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 93 with the following transitions: [2018-10-24 12:15:51,372 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [21], [24], [26], [29], [32], [37], [42], [47], [50], [52], [68], [71], [73], [76], [78], [79], [80], [81], [83], [84], [85], [86], [87], [88], [89], [90], [91], [92], [93], [94], [95], [96], [97], [98], [99], [100], [101], [102], [103], [104], [105], [106], [107], [108], [109] [2018-10-24 12:15:51,374 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:15:51,374 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:15:51,740 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:15:51,740 INFO L272 AbstractInterpreter]: Visited 49 different actions 1523 times. Merged at 25 different actions 356 times. Widened at 3 different actions 20 times. Found 18 fixpoints after 4 different actions. Largest state had 13 variables. [2018-10-24 12:15:51,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:15:51,770 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:15:51,834 INFO L232 lantSequenceWeakener]: Weakened 51 states. On average, predicates are now at 71.96% of their original sizes. [2018-10-24 12:15:51,834 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:15:52,655 INFO L413 sIntCurrentIteration]: We have 91 unified AI predicates [2018-10-24 12:15:52,656 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:15:52,656 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:15:52,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [8] total 24 [2018-10-24 12:15:52,656 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:15:52,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 12:15:52,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 12:15:52,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2018-10-24 12:15:52,658 INFO L87 Difference]: Start difference. First operand 460 states and 636 transitions. Second operand 18 states. [2018-10-24 12:15:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:15:58,307 INFO L93 Difference]: Finished difference Result 905 states and 1335 transitions. [2018-10-24 12:15:58,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 12:15:58,308 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 92 [2018-10-24 12:15:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:15:58,308 INFO L225 Difference]: With dead ends: 905 [2018-10-24 12:15:58,308 INFO L226 Difference]: Without dead ends: 0 [2018-10-24 12:15:58,312 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2018-10-24 12:15:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-24 12:15:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-24 12:15:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-24 12:15:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-24 12:15:58,313 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2018-10-24 12:15:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:15:58,313 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-24 12:15:58,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 12:15:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-24 12:15:58,314 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-24 12:15:58,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-24 12:15:59,835 WARN L179 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 399 DAG size of output: 231 [2018-10-24 12:16:00,005 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:00,036 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 119 [2018-10-24 12:16:00,159 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 106 [2018-10-24 12:16:01,307 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:01,323 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:01,662 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:01,729 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:02,108 WARN L179 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 406 DAG size of output: 353 [2018-10-24 12:16:02,272 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:02,293 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 119 [2018-10-24 12:16:03,440 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:03,501 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:03,753 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:03,810 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:04,151 WARN L179 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 406 DAG size of output: 353 [2018-10-24 12:16:04,269 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:04,290 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 119 [2018-10-24 12:16:04,408 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:04,429 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 119 [2018-10-24 12:16:04,621 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:04,628 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 142 [2018-10-24 12:16:04,725 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:04,758 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:04,777 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:04,925 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:05,000 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:05,011 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:05,053 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:05,115 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:05,257 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:05,296 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:05,625 WARN L179 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 348 [2018-10-24 12:16:05,792 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:05,801 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 142 [2018-10-24 12:16:06,056 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:06,085 WARN L179 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 293 [2018-10-24 12:16:06,461 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-24 12:16:06,505 WARN L179 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 222 [2018-10-24 12:16:07,267 WARN L179 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 37 [2018-10-24 12:16:07,395 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 27 [2018-10-24 12:16:07,523 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 26 [2018-10-24 12:16:09,558 WARN L179 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 351 DAG size of output: 37 [2018-10-24 12:16:09,722 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 27 [2018-10-24 12:16:09,868 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 26 [2018-10-24 12:16:11,775 WARN L179 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 351 DAG size of output: 37 [2018-10-24 12:16:11,899 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 27 [2018-10-24 12:16:12,020 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 27 [2018-10-24 12:16:12,142 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 25 [2018-10-24 12:16:12,684 WARN L179 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 27 [2018-10-24 12:16:12,815 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 25 [2018-10-24 12:16:14,497 WARN L179 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 343 DAG size of output: 40 [2018-10-24 12:16:15,059 WARN L179 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 27 [2018-10-24 12:16:15,880 WARN L179 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 30 [2018-10-24 12:16:16,395 WARN L179 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 26 [2018-10-24 12:16:16,831 WARN L179 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 37 [2018-10-24 12:16:16,961 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 26 [2018-10-24 12:16:16,965 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-24 12:16:16,965 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:16:16,965 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:16:16,965 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-24 12:16:16,965 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-24 12:16:16,965 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-24 12:16:16,965 INFO L421 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= (+ main_~i~0 2) main_~len~0) (<= 0 (* 2 main_~j~0)) (<= .cse0 main_~bufsize~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 0 (* 2 main_~i~0)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,966 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 53) no Hoare annotation was computed. [2018-10-24 12:16:16,966 INFO L421 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= (+ main_~i~0 2) main_~len~0) (<= 0 (* 2 main_~j~0)) (<= .cse0 main_~bufsize~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 0 (* 2 main_~i~0)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,966 INFO L421 ceAbstractionStarter]: At program point L23-1(line 23) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= (+ main_~i~0 2) main_~len~0) (<= 0 (* 2 main_~j~0)) (<= .cse0 main_~bufsize~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 0 (* 2 main_~i~0)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,966 INFO L421 ceAbstractionStarter]: At program point L44(line 44) the Hoare annotation is: (let ((.cse7 (+ main_~limit~0 4))) (let ((.cse0 (<= .cse7 main_~bufsize~0)) (.cse3 (<= 0 (* 2 main_~j~0))) (.cse4 (<= main_~bufsize~0 .cse7)) (.cse5 (<= (+ main_~j~0 5) main_~bufsize~0)) (.cse6 (<= (* 2 main_~limit~0) 4294967286))) (or (let ((.cse1 (+ main_~i~0 main_~len~0)) (.cse2 (+ main_~i~0 1))) (and .cse0 (<= 1 .cse1) (<= .cse1 4294967293) (<= main_~len~0 .cse2) (<= .cse2 main_~len~0) .cse3 .cse4 .cse5 .cse6)) (and .cse0 (<= (* 2 main_~len~0) 4294967294) (<= 0 (* 2 main_~i~0)) (<= (+ main_~i~0 2) main_~len~0) .cse3 .cse4 .cse5 .cse6)))) [2018-10-24 12:16:16,967 INFO L421 ceAbstractionStarter]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= (+ main_~i~0 1) main_~len~0) (<= 2 (* 2 main_~i~0)) (<= (+ main_~j~0 4) main_~bufsize~0) (<= .cse0 main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 2 (* 2 main_~j~0)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,967 INFO L421 ceAbstractionStarter]: At program point L32-1(line 32) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= (+ main_~i~0 1) main_~len~0) (<= 2 (* 2 main_~i~0)) (<= (+ main_~j~0 4) main_~bufsize~0) (<= .cse0 main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 2 (* 2 main_~j~0)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,967 INFO L421 ceAbstractionStarter]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= (+ main_~i~0 2) main_~len~0) (<= 0 (* 2 main_~j~0)) (<= .cse0 main_~bufsize~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 0 (* 2 main_~i~0)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,967 INFO L425 ceAbstractionStarter]: For program point L24(line 24) no Hoare annotation was computed. [2018-10-24 12:16:16,967 INFO L425 ceAbstractionStarter]: For program point L20-1(lines 20 51) no Hoare annotation was computed. [2018-10-24 12:16:16,967 INFO L421 ceAbstractionStarter]: At program point L20-3(lines 20 51) the Hoare annotation is: (let ((.cse3 (* 2 main_~limit~0)) (.cse4 (+ main_~limit~0 4))) (let ((.cse0 (<= .cse4 main_~bufsize~0)) (.cse1 (<= main_~bufsize~0 .cse4)) (.cse2 (<= .cse3 4294967286))) (or (and .cse0 (<= (* 2 main_~len~0) 4294967294) (<= 0 (* 2 main_~i~0)) (<= main_~i~0 (+ main_~limit~0 2147483647)) (<= 0 (* 2 main_~j~0)) .cse1 (<= main_~i~0 main_~len~0) .cse2 (<= main_~j~0 main_~bufsize~0)) (and (and (and (<= (+ main_~i~0 main_~len~0) 2147483647) .cse0 (<= 0 (+ main_~i~0 main_~len~0 2147483648)) .cse1) (= main_~i~0 0)) .cse2 (<= 0 (+ .cse3 8)))))) [2018-10-24 12:16:16,967 INFO L425 ceAbstractionStarter]: For program point L20-4(lines 20 51) no Hoare annotation was computed. [2018-10-24 12:16:16,968 INFO L421 ceAbstractionStarter]: At program point L45(line 45) the Hoare annotation is: (let ((.cse7 (+ main_~limit~0 4))) (let ((.cse0 (<= .cse7 main_~bufsize~0)) (.cse3 (<= 0 (* 2 main_~j~0))) (.cse4 (<= main_~bufsize~0 .cse7)) (.cse5 (<= (+ main_~j~0 5) main_~bufsize~0)) (.cse6 (<= (* 2 main_~limit~0) 4294967286))) (or (let ((.cse1 (+ main_~i~0 main_~len~0)) (.cse2 (+ main_~i~0 1))) (and .cse0 (<= 1 .cse1) (<= .cse1 4294967293) (<= main_~len~0 .cse2) (<= .cse2 main_~len~0) .cse3 .cse4 .cse5 .cse6)) (and .cse0 (<= (* 2 main_~len~0) 4294967294) (<= 0 (* 2 main_~i~0)) (<= (+ main_~i~0 2) main_~len~0) .cse3 .cse4 .cse5 .cse6)))) [2018-10-24 12:16:16,968 INFO L421 ceAbstractionStarter]: At program point L33(line 33) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= (+ main_~i~0 1) main_~len~0) (<= 2 (* 2 main_~i~0)) (<= (+ main_~j~0 4) main_~bufsize~0) (<= .cse0 main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 2 (* 2 main_~j~0)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,968 INFO L425 ceAbstractionStarter]: For program point L29(line 29) no Hoare annotation was computed. [2018-10-24 12:16:16,968 INFO L425 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-10-24 12:16:16,968 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 21 50) no Hoare annotation was computed. [2018-10-24 12:16:16,968 INFO L421 ceAbstractionStarter]: At program point L21-3(lines 21 50) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= main_~i~0 main_~len~0) (<= 0 (* 2 main_~j~0)) (<= .cse0 main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 0 (* 2 main_~i~0)) (<= main_~j~0 main_~bufsize~0) (<= 1 (+ main_~i~0 main_~len~0)) (<= main_~i~0 (+ main_~limit~0 2147483647)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,968 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-10-24 12:16:16,968 INFO L425 ceAbstractionStarter]: For program point L46(line 46) no Hoare annotation was computed. [2018-10-24 12:16:16,968 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 53) no Hoare annotation was computed. [2018-10-24 12:16:16,969 INFO L421 ceAbstractionStarter]: At program point L42(lines 22 49) the Hoare annotation is: (let ((.cse7 (+ main_~limit~0 4))) (let ((.cse0 (<= .cse7 main_~bufsize~0)) (.cse3 (<= 0 (* 2 main_~j~0))) (.cse4 (<= main_~bufsize~0 .cse7)) (.cse5 (<= (+ main_~j~0 5) main_~bufsize~0)) (.cse6 (<= (* 2 main_~limit~0) 4294967286))) (or (let ((.cse1 (+ main_~i~0 main_~len~0)) (.cse2 (+ main_~i~0 1))) (and .cse0 (<= 1 .cse1) (<= .cse1 4294967293) (<= main_~len~0 .cse2) (<= .cse2 main_~len~0) .cse3 .cse4 .cse5 .cse6)) (and .cse0 (<= (* 2 main_~len~0) 4294967294) (<= 0 (* 2 main_~i~0)) (<= (+ main_~i~0 2) main_~len~0) .cse3 .cse4 .cse5 .cse6)))) [2018-10-24 12:16:16,969 INFO L421 ceAbstractionStarter]: At program point L38(line 38) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= 4 (* 2 main_~j~0)) (<= main_~i~0 main_~len~0) (<= .cse0 main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 4 (* 2 main_~i~0)) (<= main_~j~0 (+ main_~limit~0 1)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,969 INFO L421 ceAbstractionStarter]: At program point L38-1(line 38) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= 4 (* 2 main_~j~0)) (<= main_~i~0 main_~len~0) (<= .cse0 main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 4 (* 2 main_~i~0)) (<= main_~j~0 (+ main_~limit~0 1)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,969 INFO L421 ceAbstractionStarter]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= (+ main_~i~0 1) main_~len~0) (<= 2 (* 2 main_~i~0)) (<= (+ main_~j~0 4) main_~bufsize~0) (<= .cse0 main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 2 (* 2 main_~j~0)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,969 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 53) the Hoare annotation is: true [2018-10-24 12:16:16,969 INFO L421 ceAbstractionStarter]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= (+ main_~i~0 2) main_~len~0) (<= 0 (* 2 main_~j~0)) (<= .cse0 main_~bufsize~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 0 (* 2 main_~i~0)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,969 INFO L421 ceAbstractionStarter]: At program point L26-1(line 26) the Hoare annotation is: (let ((.cse0 (+ main_~limit~0 4))) (and (<= (* 2 main_~len~0) 4294967294) (<= (+ main_~i~0 2) main_~len~0) (<= 0 (* 2 main_~j~0)) (<= .cse0 main_~bufsize~0) (<= (+ main_~j~0 5) main_~bufsize~0) (<= (* 2 main_~limit~0) 4294967286) (<= 0 (* 2 main_~i~0)) (<= main_~bufsize~0 .cse0))) [2018-10-24 12:16:16,969 INFO L425 ceAbstractionStarter]: For program point L22(lines 22 49) no Hoare annotation was computed. [2018-10-24 12:16:16,969 INFO L421 ceAbstractionStarter]: At program point L43(line 43) the Hoare annotation is: (let ((.cse7 (+ main_~limit~0 4))) (let ((.cse0 (<= .cse7 main_~bufsize~0)) (.cse3 (<= 0 (* 2 main_~j~0))) (.cse4 (<= main_~bufsize~0 .cse7)) (.cse5 (<= (+ main_~j~0 5) main_~bufsize~0)) (.cse6 (<= (* 2 main_~limit~0) 4294967286))) (or (let ((.cse1 (+ main_~i~0 main_~len~0)) (.cse2 (+ main_~i~0 1))) (and .cse0 (<= 1 .cse1) (<= .cse1 4294967293) (<= main_~len~0 .cse2) (<= .cse2 main_~len~0) .cse3 .cse4 .cse5 .cse6)) (and .cse0 (<= (* 2 main_~len~0) 4294967294) (<= 0 (* 2 main_~i~0)) (<= (+ main_~i~0 2) main_~len~0) .cse3 .cse4 .cse5 .cse6)))) [2018-10-24 12:16:16,970 INFO L425 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-10-24 12:16:16,970 INFO L425 ceAbstractionStarter]: For program point L35(line 35) no Hoare annotation was computed. [2018-10-24 12:16:16,970 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-24 12:16:16,970 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-24 12:16:16,970 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-24 12:16:16,970 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-24 12:16:16,970 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-24 12:16:16,970 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-24 12:16:16,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:16:16 BoogieIcfgContainer [2018-10-24 12:16:16,984 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:16:16,985 INFO L168 Benchmark]: Toolchain (without parser) took 85894.15 ms. Allocated memory was 1.6 GB in the beginning and 3.0 GB in the end (delta: 1.4 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-24 12:16:16,986 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:16:16,986 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.73 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:16:16,987 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.79 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:16:16,987 INFO L168 Benchmark]: Boogie Preprocessor took 25.60 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:16:16,988 INFO L168 Benchmark]: RCFGBuilder took 628.66 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -834.5 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:16:16,989 INFO L168 Benchmark]: TraceAbstraction took 84921.89 ms. Allocated memory was 2.3 GB in the beginning and 3.0 GB in the end (delta: 648.0 MB). Free memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: -436.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-24 12:16:16,993 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.73 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 22.79 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.60 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 628.66 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -834.5 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 84921.89 ms. Allocated memory was 2.3 GB in the beginning and 3.0 GB in the end (delta: 648.0 MB). Free memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: -436.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: ((((((((limit + 4 <= bufsize && 2 * len <= 4294967294) && 0 <= 2 * i) && i <= limit + 2147483647) && 0 <= 2 * j) && bufsize <= limit + 4) && i <= len) && 2 * limit <= 4294967286) && j <= bufsize) || ((((((i + len <= 2147483647 && limit + 4 <= bufsize) && 0 <= i + len + 2147483648) && bufsize <= limit + 4) && i == 0) && 2 * limit <= 4294967286) && 0 <= 2 * limit + 8) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((((((((2 * len <= 4294967294 && i <= len) && 0 <= 2 * j) && limit + 4 <= bufsize) && 2 * limit <= 4294967286) && 0 <= 2 * i) && j <= bufsize) && 1 <= i + len) && i <= limit + 2147483647) && bufsize <= limit + 4 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((((limit + 4 <= bufsize && 1 <= i + len) && i + len <= 4294967293) && len <= i + 1) && i + 1 <= len) && 0 <= 2 * j) && bufsize <= limit + 4) && j + 5 <= bufsize) && 2 * limit <= 4294967286) || (((((((limit + 4 <= bufsize && 2 * len <= 4294967294) && 0 <= 2 * i) && i + 2 <= len) && 0 <= 2 * j) && bufsize <= limit + 4) && j + 5 <= bufsize) && 2 * limit <= 4294967286) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 44 locations, 1 error locations. SAFE Result, 84.8s OverallTime, 15 OverallIterations, 14 TraceHistogramMax, 51.9s AutomataDifference, 0.0s DeadEndRemovalTime, 18.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 1034 SDtfs, 890 SDslu, 4407 SDs, 0 SdLazy, 2309 SolverSat, 1976 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 26 DeclaredPredicates, 929 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=460occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.0s AbstIntTime, 13 AbstIntIterations, 13 AbstIntStrong, 0.9003762782818469 AbsIntWeakeningRatio, 0.4794188861985472 AbsIntAvgWeakeningVarsNumRemoved, 6.825665859564165 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 307 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 539 PreInvPairs, 923 NumberOfFragments, 974 HoareAnnotationTreeSize, 539 FomulaSimplifications, 4280871 FormulaSimplificationTreeSizeReduction, 8.2s HoareSimplificationTime, 23 FomulaSimplificationsInter, 276368 FormulaSimplificationTreeSizeReductionInter, 10.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 869 NumberOfCodeBlocks, 869 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 854 ConstructedInterpolants, 0 QuantifiedInterpolants, 114680 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 2067/2389 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...