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/Problem14_label58_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 22:30:41,229 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 22:30:41,233 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 22:30:41,249 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 22:30:41,250 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 22:30:41,251 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 22:30:41,253 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 22:30:41,256 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 22:30:41,257 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 22:30:41,258 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 22:30:41,259 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 22:30:41,260 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 22:30:41,260 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 22:30:41,265 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 22:30:41,266 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 22:30:41,267 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 22:30:41,268 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 22:30:41,271 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 22:30:41,276 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 22:30:41,278 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 22:30:41,279 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 22:30:41,283 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 22:30:41,286 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 22:30:41,298 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 22:30:41,324 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 22:30:41,325 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 22:30:41,325 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 22:30:41,326 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 22:30:41,326 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 22:30:41,326 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 22:30:41,326 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 22:30:41,326 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 22:30:41,327 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 22:30:41,327 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 22:30:41,327 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 22:30:41,327 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 22:30:41,328 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 22:30:41,328 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 22:30:41,328 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 22:30:41,328 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 22:30:41,329 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 22:30:41,329 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 22:30:41,329 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 22:30:41,329 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 22:30:41,329 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 22:30:41,330 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 22:30:41,330 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 22:30:41,330 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 22:30:41,330 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 22:30:41,330 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 22:30:41,331 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 22:30:41,331 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 22:30:41,331 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 22:30:41,331 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 22:30:41,331 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 22:30:41,331 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 22:30:41,332 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 22:30:41,332 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 22:30:41,380 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 22:30:41,392 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 22:30:41,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 22:30:41,398 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 22:30:41,398 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 22:30:41,399 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label58_false-unreach-call_false-termination.c [2018-10-23 22:30:41,458 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9702db026/3fad10f4c02540a788ba3df794154990/FLAG4603b5664 [2018-10-23 22:30:42,083 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 22:30:42,084 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label58_false-unreach-call_false-termination.c [2018-10-23 22:30:42,103 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9702db026/3fad10f4c02540a788ba3df794154990/FLAG4603b5664 [2018-10-23 22:30:42,121 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9702db026/3fad10f4c02540a788ba3df794154990 [2018-10-23 22:30:42,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 22:30:42,133 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 22:30:42,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 22:30:42,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 22:30:42,138 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 22:30:42,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:30:42" (1/1) ... [2018-10-23 22:30:42,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@182517ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42, skipping insertion in model container [2018-10-23 22:30:42,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:30:42" (1/1) ... [2018-10-23 22:30:42,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 22:30:42,232 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 22:30:42,697 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:30:42,701 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 22:30:42,890 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:30:42,908 INFO L193 MainTranslator]: Completed translation [2018-10-23 22:30:42,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42 WrapperNode [2018-10-23 22:30:42,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 22:30:42,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 22:30:42,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 22:30:42,910 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 22:30:42,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42" (1/1) ... [2018-10-23 22:30:42,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42" (1/1) ... [2018-10-23 22:30:43,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 22:30:43,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 22:30:43,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 22:30:43,137 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 22:30:43,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42" (1/1) ... [2018-10-23 22:30:43,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42" (1/1) ... [2018-10-23 22:30:43,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42" (1/1) ... [2018-10-23 22:30:43,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42" (1/1) ... [2018-10-23 22:30:43,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42" (1/1) ... [2018-10-23 22:30:43,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42" (1/1) ... [2018-10-23 22:30:43,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42" (1/1) ... [2018-10-23 22:30:43,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 22:30:43,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 22:30:43,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 22:30:43,239 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 22:30:43,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42" (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 22:30:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 22:30:43,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 22:30:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-23 22:30:43,302 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-23 22:30:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 22:30:43,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 22:30:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 22:30:43,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 22:30:46,847 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 22:30:46,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:30:46 BoogieIcfgContainer [2018-10-23 22:30:46,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 22:30:46,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 22:30:46,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 22:30:46,852 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 22:30:46,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:30:42" (1/3) ... [2018-10-23 22:30:46,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567c1730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:30:46, skipping insertion in model container [2018-10-23 22:30:46,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:30:42" (2/3) ... [2018-10-23 22:30:46,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567c1730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:30:46, skipping insertion in model container [2018-10-23 22:30:46,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:30:46" (3/3) ... [2018-10-23 22:30:46,856 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label58_false-unreach-call_false-termination.c [2018-10-23 22:30:46,866 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 22:30:46,875 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 22:30:46,892 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 22:30:46,929 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 22:30:46,929 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 22:30:46,929 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 22:30:46,929 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 22:30:46,929 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 22:30:46,930 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 22:30:46,930 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 22:30:46,930 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 22:30:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-23 22:30:46,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-23 22:30:46,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:30:46,964 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] [2018-10-23 22:30:46,966 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:30:46,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:30:46,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1333191671, now seen corresponding path program 1 times [2018-10-23 22:30:46,974 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:30:47,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:30:47,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:30:47,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:30:47,029 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:30:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:30:47,391 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 22:30:47,397 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:30:47,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:30:47,397 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:30:47,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:30:47,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:30:47,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:30:47,424 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-10-23 22:30:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:30:50,127 INFO L93 Difference]: Finished difference Result 894 states and 1611 transitions. [2018-10-23 22:30:50,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:30:50,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2018-10-23 22:30:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:30:50,152 INFO L225 Difference]: With dead ends: 894 [2018-10-23 22:30:50,152 INFO L226 Difference]: Without dead ends: 633 [2018-10-23 22:30:50,162 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 22:30:50,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-10-23 22:30:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2018-10-23 22:30:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2018-10-23 22:30:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1007 transitions. [2018-10-23 22:30:50,304 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1007 transitions. Word has length 21 [2018-10-23 22:30:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:30:50,305 INFO L481 AbstractCegarLoop]: Abstraction has 633 states and 1007 transitions. [2018-10-23 22:30:50,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:30:50,306 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1007 transitions. [2018-10-23 22:30:50,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-23 22:30:50,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:30:50,320 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:30:50,320 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:30:50,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:30:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash -128001133, now seen corresponding path program 1 times [2018-10-23 22:30:50,322 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:30:50,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:30:50,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:30:50,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:30:50,324 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:30:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:30:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:30:50,625 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:30:50,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:30:50,625 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:30:50,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:30:50,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:30:50,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:30:50,628 INFO L87 Difference]: Start difference. First operand 633 states and 1007 transitions. Second operand 4 states. [2018-10-23 22:30:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:30:53,865 INFO L93 Difference]: Finished difference Result 2358 states and 3922 transitions. [2018-10-23 22:30:53,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:30:53,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2018-10-23 22:30:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:30:53,884 INFO L225 Difference]: With dead ends: 2358 [2018-10-23 22:30:53,884 INFO L226 Difference]: Without dead ends: 1731 [2018-10-23 22:30:53,891 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 22:30:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2018-10-23 22:30:53,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2018-10-23 22:30:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2018-10-23 22:30:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2621 transitions. [2018-10-23 22:30:53,972 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2621 transitions. Word has length 134 [2018-10-23 22:30:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:30:53,973 INFO L481 AbstractCegarLoop]: Abstraction has 1731 states and 2621 transitions. [2018-10-23 22:30:53,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:30:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2621 transitions. [2018-10-23 22:30:53,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-23 22:30:53,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:30:53,981 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 22:30:53,982 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:30:53,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:30:53,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1381552484, now seen corresponding path program 1 times [2018-10-23 22:30:53,982 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:30:53,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:30:53,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:30:53,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:30:53,984 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:30:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:30:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:30:54,261 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:30:54,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:30:54,262 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:30:54,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:30:54,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:30:54,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:30:54,263 INFO L87 Difference]: Start difference. First operand 1731 states and 2621 transitions. Second operand 4 states. [2018-10-23 22:30:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:30:57,684 INFO L93 Difference]: Finished difference Result 6200 states and 9916 transitions. [2018-10-23 22:30:57,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:30:57,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2018-10-23 22:30:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:30:57,728 INFO L225 Difference]: With dead ends: 6200 [2018-10-23 22:30:57,729 INFO L226 Difference]: Without dead ends: 4475 [2018-10-23 22:30:57,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:30:57,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2018-10-23 22:30:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 4292. [2018-10-23 22:30:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2018-10-23 22:30:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 6361 transitions. [2018-10-23 22:30:57,914 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 6361 transitions. Word has length 155 [2018-10-23 22:30:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:30:57,915 INFO L481 AbstractCegarLoop]: Abstraction has 4292 states and 6361 transitions. [2018-10-23 22:30:57,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:30:57,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 6361 transitions. [2018-10-23 22:30:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-23 22:30:57,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:30:57,929 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:30:57,930 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:30:57,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:30:57,930 INFO L82 PathProgramCache]: Analyzing trace with hash 622289172, now seen corresponding path program 1 times [2018-10-23 22:30:57,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:30:57,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:30:57,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:30:57,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:30:57,932 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:30:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:30:58,790 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2018-10-23 22:30:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 119 proven. 86 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-23 22:30:59,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:30:59,187 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:30:59,188 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 314 with the following transitions: [2018-10-23 22:30:59,191 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [69], [71], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [738], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-23 22:30:59,264 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:30:59,264 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:31:00,727 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:31:02,794 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 22:31:02,796 INFO L272 AbstractInterpreter]: Visited 137 different actions 137 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-23 22:31:02,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:31:02,810 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 22:31:05,371 INFO L232 lantSequenceWeakener]: Weakened 302 states. On average, predicates are now at 77.4% of their original sizes. [2018-10-23 22:31:05,371 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 22:31:05,825 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 22:31:05,826 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 22:31:05,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2018-10-23 22:31:05,826 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:31:05,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 22:31:05,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 22:31:05,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-23 22:31:05,828 INFO L87 Difference]: Start difference. First operand 4292 states and 6361 transitions. Second operand 7 states. [2018-10-23 22:31:20,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:31:20,403 INFO L93 Difference]: Finished difference Result 8763 states and 12926 transitions. [2018-10-23 22:31:20,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:31:20,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 313 [2018-10-23 22:31:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:31:20,430 INFO L225 Difference]: With dead ends: 8763 [2018-10-23 22:31:20,431 INFO L226 Difference]: Without dead ends: 4477 [2018-10-23 22:31:20,454 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 313 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-23 22:31:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2018-10-23 22:31:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 4475. [2018-10-23 22:31:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4475 states. [2018-10-23 22:31:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 6552 transitions. [2018-10-23 22:31:20,586 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 6552 transitions. Word has length 313 [2018-10-23 22:31:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:31:20,587 INFO L481 AbstractCegarLoop]: Abstraction has 4475 states and 6552 transitions. [2018-10-23 22:31:20,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 22:31:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 6552 transitions. [2018-10-23 22:31:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-10-23 22:31:20,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:31:20,600 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:31:20,601 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:31:20,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:31:20,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1980550211, now seen corresponding path program 1 times [2018-10-23 22:31:20,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:31:20,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:31:20,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:31:20,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:31:20,603 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:31:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:31:21,001 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-10-23 22:31:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 130 proven. 164 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-23 22:31:21,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:31:21,751 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:31:21,751 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 325 with the following transitions: [2018-10-23 22:31:21,752 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [69], [71], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [738], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-23 22:31:21,758 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:31:21,758 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:31:23,031 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:31:27,318 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 22:31:27,319 INFO L272 AbstractInterpreter]: Visited 140 different actions 273 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-23 22:31:27,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:31:27,327 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 22:31:30,198 INFO L232 lantSequenceWeakener]: Weakened 150 states. On average, predicates are now at 77.77% of their original sizes. [2018-10-23 22:31:30,198 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 22:31:53,610 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 22:31:53,610 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 22:31:53,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [12] total 34 [2018-10-23 22:31:53,612 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:31:53,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-23 22:31:53,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-23 22:31:53,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2018-10-23 22:31:53,616 INFO L87 Difference]: Start difference. First operand 4475 states and 6552 transitions. Second operand 24 states. [2018-10-23 22:34:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:34:01,951 INFO L93 Difference]: Finished difference Result 9324 states and 13650 transitions. [2018-10-23 22:34:01,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 22:34:01,951 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 324 [2018-10-23 22:34:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:34:01,977 INFO L225 Difference]: With dead ends: 9324 [2018-10-23 22:34:01,978 INFO L226 Difference]: Without dead ends: 5038 [2018-10-23 22:34:02,001 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 337 GetRequests, 281 SyntacticMatches, 20 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2018-10-23 22:34:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5038 states. [2018-10-23 22:34:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5038 to 5034. [2018-10-23 22:34:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5034 states. [2018-10-23 22:34:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 7143 transitions. [2018-10-23 22:34:02,253 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 7143 transitions. Word has length 324 [2018-10-23 22:34:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:34:02,253 INFO L481 AbstractCegarLoop]: Abstraction has 5034 states and 7143 transitions. [2018-10-23 22:34:02,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-23 22:34:02,255 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 7143 transitions. [2018-10-23 22:34:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-10-23 22:34:02,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:34:02,277 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:02,277 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:34:02,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:34:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1429919366, now seen corresponding path program 1 times [2018-10-23 22:34:02,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:34:02,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:34:02,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:34:02,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:34:02,279 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:34:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:34:02,774 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-10-23 22:34:02,905 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2018-10-23 22:34:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 254 proven. 224 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-23 22:34:03,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:34:03,379 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:34:03,380 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 425 with the following transitions: [2018-10-23 22:34:03,380 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [69], [71], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [738], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-23 22:34:03,385 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:34:03,385 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:34:04,117 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:34:10,509 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 22:34:10,510 INFO L272 AbstractInterpreter]: Visited 141 different actions 276 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-23 22:34:10,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:34:10,521 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 22:34:14,220 INFO L232 lantSequenceWeakener]: Weakened 403 states. On average, predicates are now at 77.48% of their original sizes. [2018-10-23 22:34:14,221 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 22:34:17,935 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 22:34:17,935 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 22:34:17,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [14] total 29 [2018-10-23 22:34:17,935 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:34:17,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 22:34:17,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 22:34:17,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-10-23 22:34:17,937 INFO L87 Difference]: Start difference. First operand 5034 states and 7143 transitions. Second operand 17 states. Received shutdown request... [2018-10-23 22:34:43,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 22:34:43,315 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 22:34:43,320 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 22:34:43,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:34:43 BoogieIcfgContainer [2018-10-23 22:34:43,321 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 22:34:43,322 INFO L168 Benchmark]: Toolchain (without parser) took 241189.71 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 1.5 GB in the end (delta: -92.7 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-10-23 22:34:43,323 INFO L168 Benchmark]: CDTParser took 0.20 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 22:34:43,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 775.52 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-10-23 22:34:43,324 INFO L168 Benchmark]: Boogie Procedure Inliner took 226.64 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 723.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -821.5 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2018-10-23 22:34:43,325 INFO L168 Benchmark]: Boogie Preprocessor took 101.61 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2018-10-23 22:34:43,326 INFO L168 Benchmark]: RCFGBuilder took 3609.59 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 119.5 MB). Peak memory consumption was 119.5 MB. Max. memory is 7.1 GB. [2018-10-23 22:34:43,327 INFO L168 Benchmark]: TraceAbstraction took 236472.03 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 542.6 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-10-23 22:34:43,332 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 775.52 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 226.64 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 723.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -821.5 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.61 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3609.59 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 119.5 MB). Peak memory consumption was 119.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236472.03 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 542.6 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 46). Cancelled while BasicCegarLoop was constructing difference of abstraction (5034states) and FLOYD_HOARE automaton (currently 9 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (93 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 236.4s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 177.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 905 SDtfs, 4150 SDslu, 983 SDs, 0 SdLazy, 7453 SolverSat, 1344 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 71.2s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 1094 GetRequests, 1006 SyntacticMatches, 20 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 33.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5034occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 16.3s AbstIntTime, 3 AbstIntIterations, 3 AbstIntStrong, 0.9959316183118266 AbsIntWeakeningRatio, 0.09640831758034027 AbsIntAvgWeakeningVarsNumRemoved, 420.5765595463138 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 5 MinimizatonAttempts, 189 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 1371 NumberOfCodeBlocks, 1371 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 1365 ConstructedInterpolants, 0 QuantifiedInterpolants, 4853032 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 693/1167 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown