java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label49_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 22:50:02,351 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 22:50:02,353 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 22:50:02,366 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 22:50:02,366 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 22:50:02,367 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 22:50:02,368 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 22:50:02,370 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 22:50:02,372 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 22:50:02,372 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 22:50:02,373 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 22:50:02,374 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 22:50:02,375 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 22:50:02,375 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 22:50:02,377 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 22:50:02,377 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 22:50:02,378 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 22:50:02,380 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 22:50:02,382 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 22:50:02,384 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 22:50:02,385 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 22:50:02,386 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 22:50:02,389 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 22:50:02,402 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 [2018-10-23 22:50:02,428 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 22:50:02,428 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 22:50:02,429 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 22:50:02,429 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 22:50:02,430 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 22:50:02,430 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 22:50:02,430 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 22:50:02,430 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 22:50:02,430 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 22:50:02,431 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 22:50:02,431 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 22:50:02,431 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 22:50:02,432 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 22:50:02,432 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 22:50:02,432 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 22:50:02,432 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 22:50:02,432 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 22:50:02,433 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 22:50:02,433 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 22:50:02,433 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 22:50:02,433 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 22:50:02,433 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 22:50:02,434 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 22:50:02,434 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 22:50:02,434 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 22:50:02,434 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 22:50:02,434 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 22:50:02,435 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 22:50:02,435 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 22:50:02,435 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 22:50:02,435 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 22:50:02,435 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 22:50:02,435 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 22:50:02,436 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 22:50:02,489 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 22:50:02,502 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 22:50:02,506 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 22:50:02,508 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 22:50:02,508 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 22:50:02,509 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label49_false-unreach-call.c [2018-10-23 22:50:02,572 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/473c0f365/ae6f7a5268764d1f98ab79c7ec2e0ce2/FLAG16a640f86 [2018-10-23 22:50:03,301 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 22:50:03,303 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label49_false-unreach-call.c [2018-10-23 22:50:03,341 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/473c0f365/ae6f7a5268764d1f98ab79c7ec2e0ce2/FLAG16a640f86 [2018-10-23 22:50:03,361 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/473c0f365/ae6f7a5268764d1f98ab79c7ec2e0ce2 [2018-10-23 22:50:03,377 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 22:50:03,380 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 22:50:03,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 22:50:03,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 22:50:03,387 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 22:50:03,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:50:03" (1/1) ... [2018-10-23 22:50:03,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c5ece5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:03, skipping insertion in model container [2018-10-23 22:50:03,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:50:03" (1/1) ... [2018-10-23 22:50:03,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 22:50:03,546 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 22:50:04,592 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:50:04,597 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 22:50:05,072 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:50:05,099 INFO L193 MainTranslator]: Completed translation [2018-10-23 22:50:05,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:05 WrapperNode [2018-10-23 22:50:05,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 22:50:05,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 22:50:05,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 22:50:05,102 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 22:50:05,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:05" (1/1) ... [2018-10-23 22:50:05,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:05" (1/1) ... [2018-10-23 22:50:05,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 22:50:05,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 22:50:05,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 22:50:05,653 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 22:50:05,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:05" (1/1) ... [2018-10-23 22:50:05,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:05" (1/1) ... [2018-10-23 22:50:05,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:05" (1/1) ... [2018-10-23 22:50:05,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:05" (1/1) ... [2018-10-23 22:50:05,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:05" (1/1) ... [2018-10-23 22:50:05,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:05" (1/1) ... [2018-10-23 22:50:05,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:05" (1/1) ... [2018-10-23 22:50:06,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 22:50:06,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 22:50:06,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 22:50:06,007 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 22:50:06,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:05" (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 [2018-10-23 22:50:06,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 22:50:06,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 22:50:06,075 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-23 22:50:06,076 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-23 22:50:06,076 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-23 22:50:06,076 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-23 22:50:06,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 22:50:06,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 22:50:06,077 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 22:50:06,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 22:50:19,627 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 22:50:19,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:50:19 BoogieIcfgContainer [2018-10-23 22:50:19,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 22:50:19,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 22:50:19,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 22:50:19,635 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 22:50:19,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:50:03" (1/3) ... [2018-10-23 22:50:19,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7055d22a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:50:19, skipping insertion in model container [2018-10-23 22:50:19,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:50:05" (2/3) ... [2018-10-23 22:50:19,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7055d22a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:50:19, skipping insertion in model container [2018-10-23 22:50:19,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:50:19" (3/3) ... [2018-10-23 22:50:19,639 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label49_false-unreach-call.c [2018-10-23 22:50:19,650 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 22:50:19,660 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 22:50:19,678 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 22:50:19,723 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 22:50:19,723 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 22:50:19,723 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 22:50:19,724 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 22:50:19,724 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 22:50:19,724 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 22:50:19,724 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 22:50:19,724 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 22:50:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-23 22:50:19,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-23 22:50:19,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:50:19,778 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:50:19,781 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:50:19,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:50:19,787 INFO L82 PathProgramCache]: Analyzing trace with hash -549765852, now seen corresponding path program 1 times [2018-10-23 22:50:19,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:50:19,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:19,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:50:19,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:19,854 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:50:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:50:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:50:20,272 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:50:20,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:50:20,272 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:50:20,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:50:20,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:50:20,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:50:20,301 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-23 22:50:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:50:30,000 INFO L93 Difference]: Finished difference Result 2166 states and 4013 transitions. [2018-10-23 22:50:30,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:50:30,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2018-10-23 22:50:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:50:30,052 INFO L225 Difference]: With dead ends: 2166 [2018-10-23 22:50:30,053 INFO L226 Difference]: Without dead ends: 1556 [2018-10-23 22:50:30,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:50:30,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2018-10-23 22:50:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1068. [2018-10-23 22:50:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-10-23 22:50:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1850 transitions. [2018-10-23 22:50:30,227 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1850 transitions. Word has length 22 [2018-10-23 22:50:30,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:50:30,228 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1850 transitions. [2018-10-23 22:50:30,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:50:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1850 transitions. [2018-10-23 22:50:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-23 22:50:30,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:50:30,236 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:50:30,236 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:50:30,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:50:30,237 INFO L82 PathProgramCache]: Analyzing trace with hash -157307670, now seen corresponding path program 1 times [2018-10-23 22:50:30,237 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:50:30,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:30,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:50:30,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:30,240 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:50:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:50:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:50:30,780 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:50:30,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 22:50:30,781 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:50:30,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 22:50:30,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 22:50:30,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 22:50:30,784 INFO L87 Difference]: Start difference. First operand 1068 states and 1850 transitions. Second operand 6 states. [2018-10-23 22:50:39,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:50:39,745 INFO L93 Difference]: Finished difference Result 3059 states and 5419 transitions. [2018-10-23 22:50:39,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:50:39,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2018-10-23 22:50:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:50:39,771 INFO L225 Difference]: With dead ends: 3059 [2018-10-23 22:50:39,771 INFO L226 Difference]: Without dead ends: 1997 [2018-10-23 22:50:39,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 22:50:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2018-10-23 22:50:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1975. [2018-10-23 22:50:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2018-10-23 22:50:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3181 transitions. [2018-10-23 22:50:39,862 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3181 transitions. Word has length 98 [2018-10-23 22:50:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:50:39,864 INFO L481 AbstractCegarLoop]: Abstraction has 1975 states and 3181 transitions. [2018-10-23 22:50:39,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 22:50:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3181 transitions. [2018-10-23 22:50:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-23 22:50:39,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:50:39,870 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:50:39,870 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:50:39,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:50:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1941736734, now seen corresponding path program 1 times [2018-10-23 22:50:39,871 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:50:39,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:39,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:50:39,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:39,872 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:50:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:50:40,218 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 22:50:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:50:40,616 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:50:40,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 22:50:40,616 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:50:40,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 22:50:40,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 22:50:40,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 22:50:40,618 INFO L87 Difference]: Start difference. First operand 1975 states and 3181 transitions. Second operand 6 states. [2018-10-23 22:50:47,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:50:47,322 INFO L93 Difference]: Finished difference Result 4880 states and 7834 transitions. [2018-10-23 22:50:47,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:50:47,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2018-10-23 22:50:47,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:50:47,347 INFO L225 Difference]: With dead ends: 4880 [2018-10-23 22:50:47,347 INFO L226 Difference]: Without dead ends: 2911 [2018-10-23 22:50:47,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 22:50:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2018-10-23 22:50:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2880. [2018-10-23 22:50:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-10-23 22:50:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3936 transitions. [2018-10-23 22:50:47,439 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3936 transitions. Word has length 102 [2018-10-23 22:50:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:50:47,440 INFO L481 AbstractCegarLoop]: Abstraction has 2880 states and 3936 transitions. [2018-10-23 22:50:47,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 22:50:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3936 transitions. [2018-10-23 22:50:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-23 22:50:47,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:50:47,444 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:50:47,444 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:50:47,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:50:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash 927500415, now seen corresponding path program 1 times [2018-10-23 22:50:47,445 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:50:47,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:47,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:50:47,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:47,446 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:50:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:50:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:50:47,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:50:47,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:50:47,586 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:50:47,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:50:47,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:50:47,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:50:47,587 INFO L87 Difference]: Start difference. First operand 2880 states and 3936 transitions. Second operand 4 states. [2018-10-23 22:50:57,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:50:57,507 INFO L93 Difference]: Finished difference Result 6193 states and 8578 transitions. [2018-10-23 22:50:57,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:50:57,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2018-10-23 22:50:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:50:57,533 INFO L225 Difference]: With dead ends: 6193 [2018-10-23 22:50:57,534 INFO L226 Difference]: Without dead ends: 3319 [2018-10-23 22:50:57,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:50:57,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2018-10-23 22:50:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3319. [2018-10-23 22:50:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3319 states. [2018-10-23 22:50:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 4416 transitions. [2018-10-23 22:50:57,643 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 4416 transitions. Word has length 132 [2018-10-23 22:50:57,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:50:57,643 INFO L481 AbstractCegarLoop]: Abstraction has 3319 states and 4416 transitions. [2018-10-23 22:50:57,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:50:57,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 4416 transitions. [2018-10-23 22:50:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-23 22:50:57,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:50:57,649 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:50:57,649 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:50:57,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:50:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1417902568, now seen corresponding path program 1 times [2018-10-23 22:50:57,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:50:57,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:57,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:50:57,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:50:57,651 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:50:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:50:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-23 22:50:57,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:50:57,905 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:50:57,905 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 187 with the following transitions: [2018-10-23 22:50:57,909 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [786], [788], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-23 22:50:57,991 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:50:57,991 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:50:59,872 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:51:39,250 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-23 22:51:39,252 INFO L272 AbstractInterpreter]: Visited 97 different actions 556 times. Merged at 7 different actions 32 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-23 22:51:39,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:51:39,268 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-23 22:51:39,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:51:39,269 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 22:51:39,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:51:39,285 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 22:51:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:51:39,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 22:51:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-23 22:51:40,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 22:51:42,660 WARN L179 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-10-23 22:51:43,427 WARN L179 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-10-23 22:51:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 35 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:51:43,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 22:51:43,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2018-10-23 22:51:43,899 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 22:51:43,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 22:51:43,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 22:51:43,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-10-23 22:51:43,901 INFO L87 Difference]: Start difference. First operand 3319 states and 4416 transitions. Second operand 10 states. [2018-10-23 22:52:17,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:52:17,302 INFO L93 Difference]: Finished difference Result 16332 states and 22507 transitions. [2018-10-23 22:52:17,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 22:52:17,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 186 [2018-10-23 22:52:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:52:17,372 INFO L225 Difference]: With dead ends: 16332 [2018-10-23 22:52:17,372 INFO L226 Difference]: Without dead ends: 13019 [2018-10-23 22:52:17,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2018-10-23 22:52:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13019 states. [2018-10-23 22:52:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13019 to 12898. [2018-10-23 22:52:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12898 states. [2018-10-23 22:52:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12898 states to 12898 states and 16114 transitions. [2018-10-23 22:52:17,773 INFO L78 Accepts]: Start accepts. Automaton has 12898 states and 16114 transitions. Word has length 186 [2018-10-23 22:52:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:52:17,774 INFO L481 AbstractCegarLoop]: Abstraction has 12898 states and 16114 transitions. [2018-10-23 22:52:17,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 22:52:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 12898 states and 16114 transitions. [2018-10-23 22:52:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-23 22:52:17,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:52:17,780 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:52:17,780 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:52:17,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:52:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2086441019, now seen corresponding path program 1 times [2018-10-23 22:52:17,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:52:17,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:52:17,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:52:17,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:52:17,783 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:52:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:52:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-23 22:52:18,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:52:18,847 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:52:18,847 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 209 with the following transitions: [2018-10-23 22:52:18,848 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [786], [788], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-23 22:52:18,855 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:52:18,855 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:52:20,959 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:52:21,238 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 22:52:21,238 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-23 22:52:21,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:52:21,275 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 22:52:23,512 INFO L232 lantSequenceWeakener]: Weakened 200 states. On average, predicates are now at 75.12% of their original sizes. [2018-10-23 22:52:23,512 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 22:52:24,140 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 22:52:24,141 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 22:52:24,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2018-10-23 22:52:24,141 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:52:24,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 22:52:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 22:52:24,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-23 22:52:24,143 INFO L87 Difference]: Start difference. First operand 12898 states and 16114 transitions. Second operand 8 states. Received shutdown request... [2018-10-23 22:53:42,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 22:53:42,401 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 22:53:42,406 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 22:53:42,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:53:42 BoogieIcfgContainer [2018-10-23 22:53:42,407 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 22:53:42,408 INFO L168 Benchmark]: Toolchain (without parser) took 219029.40 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 65.8 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-23 22:53:42,409 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 22:53:42,409 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1718.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-23 22:53:42,410 INFO L168 Benchmark]: Boogie Procedure Inliner took 550.65 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 770.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -920.4 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2018-10-23 22:53:42,413 INFO L168 Benchmark]: Boogie Preprocessor took 353.52 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 43.3 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB. [2018-10-23 22:53:42,414 INFO L168 Benchmark]: RCFGBuilder took 13623.87 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 474.2 MB). Peak memory consumption was 474.2 MB. Max. memory is 7.1 GB. [2018-10-23 22:53:42,421 INFO L168 Benchmark]: TraceAbstraction took 202775.20 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.7 GB in the beginning and 1.3 GB in the end (delta: 331.3 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-10-23 22:53:42,428 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1718.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 550.65 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 770.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -920.4 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 353.52 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 43.3 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13623.87 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 474.2 MB). Peak memory consumption was 474.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 202775.20 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.7 GB in the beginning and 1.3 GB in the end (delta: 331.3 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 53). Cancelled while BasicCegarLoop was constructing difference of abstraction (12898states) and FLOYD_HOARE automaton (currently 8 states, 8 states before enhancement),while ReachableStatesComputation was computing reachable states (8615 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 202.6s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 147.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1986 SDtfs, 11409 SDslu, 2015 SDs, 0 SdLazy, 18810 SolverSat, 4590 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 118.4s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 627 GetRequests, 577 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12898occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 43.7s AbstIntTime, 2 AbstIntIterations, 1 AbstIntStrong, 0.9953177257525082 AbsIntWeakeningRatio, 0.13043478260869565 AbsIntAvgWeakeningVarsNumRemoved, 1039.4830917874397 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 5 MinimizatonAttempts, 662 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 934 NumberOfCodeBlocks, 934 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 1112 ConstructedInterpolants, 93 QuantifiedInterpolants, 1104627 SizeOfPredicates, 2 NumberOfNonLiveVariables, 378 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 321/469 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown