java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label51_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 17:41:19,247 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 17:41:19,251 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 17:41:19,269 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 17:41:19,270 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 17:41:19,271 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 17:41:19,273 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 17:41:19,276 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 17:41:19,279 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 17:41:19,280 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 17:41:19,288 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 17:41:19,288 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 17:41:19,292 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 17:41:19,294 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 17:41:19,298 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 17:41:19,301 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 17:41:19,302 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 17:41:19,303 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 17:41:19,307 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 17:41:19,314 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 17:41:19,316 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 17:41:19,319 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 17:41:19,322 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-14 17:41:19,335 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 17:41:19,363 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 17:41:19,364 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 17:41:19,364 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 17:41:19,365 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 17:41:19,365 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 17:41:19,365 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 17:41:19,365 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 17:41:19,365 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 17:41:19,366 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 17:41:19,366 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 17:41:19,366 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 17:41:19,367 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 17:41:19,367 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 17:41:19,367 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 17:41:19,367 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 17:41:19,367 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 17:41:19,368 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 17:41:19,368 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 17:41:19,368 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 17:41:19,368 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 17:41:19,368 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 17:41:19,369 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 17:41:19,369 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 17:41:19,369 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:41:19,369 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 17:41:19,370 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 17:41:19,370 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 17:41:19,370 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 17:41:19,370 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 17:41:19,370 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 17:41:19,370 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 17:41:19,371 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 17:41:19,371 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 17:41:19,432 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 17:41:19,448 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 17:41:19,454 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 17:41:19,456 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 17:41:19,456 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 17:41:19,457 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label51_true-unreach-call_false-termination.c [2018-09-14 17:41:19,832 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18a99f227/0988fa4abeef47269b2c3d7c20a78c3e/FLAG38adddd10 [2018-09-14 17:41:20,081 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 17:41:20,082 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label51_true-unreach-call_false-termination.c [2018-09-14 17:41:20,100 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18a99f227/0988fa4abeef47269b2c3d7c20a78c3e/FLAG38adddd10 [2018-09-14 17:41:20,115 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18a99f227/0988fa4abeef47269b2c3d7c20a78c3e [2018-09-14 17:41:20,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 17:41:20,135 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 17:41:20,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 17:41:20,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 17:41:20,143 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 17:41:20,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:41:20" (1/1) ... [2018-09-14 17:41:20,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1234d9d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:20, skipping insertion in model container [2018-09-14 17:41:20,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:41:20" (1/1) ... [2018-09-14 17:41:20,160 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 17:41:20,805 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:41:20,822 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 17:41:20,969 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:41:21,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:21 WrapperNode [2018-09-14 17:41:21,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 17:41:21,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 17:41:21,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 17:41:21,030 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 17:41:21,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:21" (1/1) ... [2018-09-14 17:41:21,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:21" (1/1) ... [2018-09-14 17:41:21,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 17:41:21,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 17:41:21,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 17:41:21,177 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 17:41:21,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:21" (1/1) ... [2018-09-14 17:41:21,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:21" (1/1) ... [2018-09-14 17:41:21,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:21" (1/1) ... [2018-09-14 17:41:21,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:21" (1/1) ... [2018-09-14 17:41:21,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:21" (1/1) ... [2018-09-14 17:41:21,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:21" (1/1) ... [2018-09-14 17:41:21,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:21" (1/1) ... [2018-09-14 17:41:21,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 17:41:21,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 17:41:21,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 17:41:21,472 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 17:41:21,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:41:21,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 17:41:21,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 17:41:21,547 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 17:41:21,547 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 17:41:21,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 17:41:21,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 17:41:21,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 17:41:21,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 17:41:25,595 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 17:41:25,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:41:25 BoogieIcfgContainer [2018-09-14 17:41:25,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 17:41:25,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 17:41:25,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 17:41:25,604 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 17:41:25,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 05:41:20" (1/3) ... [2018-09-14 17:41:25,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3eefab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:41:25, skipping insertion in model container [2018-09-14 17:41:25,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:21" (2/3) ... [2018-09-14 17:41:25,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3eefab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:41:25, skipping insertion in model container [2018-09-14 17:41:25,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:41:25" (3/3) ... [2018-09-14 17:41:25,609 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label51_true-unreach-call_false-termination.c [2018-09-14 17:41:25,618 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 17:41:25,629 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 17:41:25,699 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 17:41:25,700 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 17:41:25,700 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 17:41:25,700 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 17:41:25,700 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 17:41:25,701 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 17:41:25,702 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 17:41:25,702 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 17:41:25,702 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 17:41:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-09-14 17:41:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-14 17:41:25,747 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:25,748 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:25,750 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash 227880372, now seen corresponding path program 1 times [2018-09-14 17:41:25,758 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:25,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:25,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:25,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:25,811 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:26,221 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:41:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:26,249 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:41:26,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 17:41:26,250 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:41:26,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:41:26,272 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:41:26,273 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:41:26,275 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-09-14 17:41:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:27,990 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-09-14 17:41:27,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:41:27,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2018-09-14 17:41:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:28,014 INFO L225 Difference]: With dead ends: 691 [2018-09-14 17:41:28,015 INFO L226 Difference]: Without dead ends: 434 [2018-09-14 17:41:28,022 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:41:28,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-09-14 17:41:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-09-14 17:41:28,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-09-14 17:41:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 767 transitions. [2018-09-14 17:41:28,118 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 767 transitions. Word has length 42 [2018-09-14 17:41:28,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:28,119 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 767 transitions. [2018-09-14 17:41:28,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:41:28,119 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 767 transitions. [2018-09-14 17:41:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-14 17:41:28,132 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:28,132 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:28,133 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:28,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1420249389, now seen corresponding path program 1 times [2018-09-14 17:41:28,133 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:28,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:28,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:28,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:28,137 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:28,464 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:41:28,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-14 17:41:28,464 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:41:28,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:41:28,466 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:41:28,467 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-14 17:41:28,467 INFO L87 Difference]: Start difference. First operand 434 states and 767 transitions. Second operand 5 states. [2018-09-14 17:41:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:32,410 INFO L93 Difference]: Finished difference Result 1416 states and 2580 transitions. [2018-09-14 17:41:32,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:41:32,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2018-09-14 17:41:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:32,426 INFO L225 Difference]: With dead ends: 1416 [2018-09-14 17:41:32,426 INFO L226 Difference]: Without dead ends: 988 [2018-09-14 17:41:32,433 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-14 17:41:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2018-09-14 17:41:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 973. [2018-09-14 17:41:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2018-09-14 17:41:32,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1540 transitions. [2018-09-14 17:41:32,511 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1540 transitions. Word has length 119 [2018-09-14 17:41:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:32,512 INFO L480 AbstractCegarLoop]: Abstraction has 973 states and 1540 transitions. [2018-09-14 17:41:32,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:41:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1540 transitions. [2018-09-14 17:41:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-14 17:41:32,526 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:32,527 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:32,527 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:32,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2006517165, now seen corresponding path program 1 times [2018-09-14 17:41:32,531 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:32,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:32,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:32,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:32,533 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:32,920 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:41:32,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:41:32,920 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:41:32,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:41:32,921 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:41:32,921 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:41:32,922 INFO L87 Difference]: Start difference. First operand 973 states and 1540 transitions. Second operand 6 states. [2018-09-14 17:41:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:36,853 INFO L93 Difference]: Finished difference Result 2353 states and 3939 transitions. [2018-09-14 17:41:36,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:41:36,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2018-09-14 17:41:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:36,870 INFO L225 Difference]: With dead ends: 2353 [2018-09-14 17:41:36,870 INFO L226 Difference]: Without dead ends: 1386 [2018-09-14 17:41:36,874 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:41:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2018-09-14 17:41:36,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1352. [2018-09-14 17:41:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2018-09-14 17:41:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 2126 transitions. [2018-09-14 17:41:36,960 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 2126 transitions. Word has length 183 [2018-09-14 17:41:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:36,961 INFO L480 AbstractCegarLoop]: Abstraction has 1352 states and 2126 transitions. [2018-09-14 17:41:36,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:41:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 2126 transitions. [2018-09-14 17:41:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-14 17:41:36,969 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:36,970 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 17:41:36,970 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:36,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1261597429, now seen corresponding path program 1 times [2018-09-14 17:41:36,971 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:36,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:36,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:36,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:36,972 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:37,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:37,464 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:41:37,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:37,475 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:37,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:38,044 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:38,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:38,378 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:41:38,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:38,396 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:38,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:38,869 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:39,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:41:39,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-14 17:41:39,138 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:41:39,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:41:39,141 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:41:39,141 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-09-14 17:41:39,142 INFO L87 Difference]: Start difference. First operand 1352 states and 2126 transitions. Second operand 9 states. [2018-09-14 17:41:39,887 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-14 17:41:50,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:50,159 INFO L93 Difference]: Finished difference Result 8546 states and 16719 transitions. [2018-09-14 17:41:50,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-14 17:41:50,160 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 203 [2018-09-14 17:41:50,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:50,235 INFO L225 Difference]: With dead ends: 8546 [2018-09-14 17:41:50,236 INFO L226 Difference]: Without dead ends: 4721 [2018-09-14 17:41:50,337 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 893 GetRequests, 839 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=548, Invalid=2314, Unknown=0, NotChecked=0, Total=2862 [2018-09-14 17:41:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2018-09-14 17:41:50,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 4199. [2018-09-14 17:41:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2018-09-14 17:41:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6104 transitions. [2018-09-14 17:41:50,600 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6104 transitions. Word has length 203 [2018-09-14 17:41:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:50,600 INFO L480 AbstractCegarLoop]: Abstraction has 4199 states and 6104 transitions. [2018-09-14 17:41:50,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:41:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6104 transitions. [2018-09-14 17:41:50,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-14 17:41:50,619 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:50,619 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-09-14 17:41:50,620 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:50,620 INFO L82 PathProgramCache]: Analyzing trace with hash -614381837, now seen corresponding path program 1 times [2018-09-14 17:41:50,620 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:50,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:50,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:50,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:50,622 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:51,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:51,242 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-14 17:41:51,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:51,257 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:41:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:51,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-09-14 17:41:51,383 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-09-14 17:41:51,600 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 17:41:51,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 13 [2018-09-14 17:41:51,601 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:41:51,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:41:51,602 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:41:51,602 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-09-14 17:41:51,603 INFO L87 Difference]: Start difference. First operand 4199 states and 6104 transitions. Second operand 3 states. [2018-09-14 17:41:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:53,442 INFO L93 Difference]: Finished difference Result 10573 states and 16158 transitions. [2018-09-14 17:41:53,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:41:53,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2018-09-14 17:41:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:53,496 INFO L225 Difference]: With dead ends: 10573 [2018-09-14 17:41:53,496 INFO L226 Difference]: Without dead ends: 6380 [2018-09-14 17:41:53,530 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-09-14 17:41:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6380 states. [2018-09-14 17:41:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6380 to 6367. [2018-09-14 17:41:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6367 states. [2018-09-14 17:41:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 8648 transitions. [2018-09-14 17:41:53,756 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 8648 transitions. Word has length 255 [2018-09-14 17:41:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:53,757 INFO L480 AbstractCegarLoop]: Abstraction has 6367 states and 8648 transitions. [2018-09-14 17:41:53,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:41:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 8648 transitions. [2018-09-14 17:41:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-09-14 17:41:53,788 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:53,788 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-09-14 17:41:53,789 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:53,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2014693689, now seen corresponding path program 1 times [2018-09-14 17:41:53,789 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:53,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:53,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:53,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:53,791 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:54,262 WARN L178 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-09-14 17:41:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 70 proven. 101 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:41:54,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:54,529 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:41:54,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:54,538 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:54,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-09-14 17:41:54,941 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:55,096 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-14 17:41:55,275 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-14 17:41:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 70 proven. 101 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:41:55,864 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:41:55,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-09-14 17:41:55,865 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:41:55,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:41:55,866 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:41:55,866 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:41:55,866 INFO L87 Difference]: Start difference. First operand 6367 states and 8648 transitions. Second operand 5 states. [2018-09-14 17:41:58,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:58,499 INFO L93 Difference]: Finished difference Result 16193 states and 20779 transitions. [2018-09-14 17:41:58,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:41:58,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2018-09-14 17:41:58,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:58,541 INFO L225 Difference]: With dead ends: 16193 [2018-09-14 17:41:58,541 INFO L226 Difference]: Without dead ends: 9152 [2018-09-14 17:41:58,575 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 517 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-09-14 17:41:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9152 states. [2018-09-14 17:41:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9152 to 7771. [2018-09-14 17:41:58,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7771 states. [2018-09-14 17:41:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7771 states to 7771 states and 9675 transitions. [2018-09-14 17:41:58,746 INFO L78 Accepts]: Start accepts. Automaton has 7771 states and 9675 transitions. Word has length 261 [2018-09-14 17:41:58,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:58,747 INFO L480 AbstractCegarLoop]: Abstraction has 7771 states and 9675 transitions. [2018-09-14 17:41:58,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:41:58,747 INFO L276 IsEmpty]: Start isEmpty. Operand 7771 states and 9675 transitions. [2018-09-14 17:41:58,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-09-14 17:41:58,771 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:58,771 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:58,771 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:58,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1450494768, now seen corresponding path program 1 times [2018-09-14 17:41:58,772 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:58,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:58,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:58,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:58,773 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-14 17:41:59,071 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:41:59,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:41:59,072 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:41:59,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:41:59,073 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:41:59,073 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:41:59,073 INFO L87 Difference]: Start difference. First operand 7771 states and 9675 transitions. Second operand 4 states. [2018-09-14 17:42:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:01,308 INFO L93 Difference]: Finished difference Result 15395 states and 19267 transitions. [2018-09-14 17:42:01,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:42:01,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2018-09-14 17:42:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:01,346 INFO L225 Difference]: With dead ends: 15395 [2018-09-14 17:42:01,347 INFO L226 Difference]: Without dead ends: 7630 [2018-09-14 17:42:01,369 INFO L604 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 [2018-09-14 17:42:01,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2018-09-14 17:42:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 7623. [2018-09-14 17:42:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7623 states. [2018-09-14 17:42:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7623 states to 7623 states and 9258 transitions. [2018-09-14 17:42:01,531 INFO L78 Accepts]: Start accepts. Automaton has 7623 states and 9258 transitions. Word has length 332 [2018-09-14 17:42:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:01,532 INFO L480 AbstractCegarLoop]: Abstraction has 7623 states and 9258 transitions. [2018-09-14 17:42:01,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:42:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 7623 states and 9258 transitions. [2018-09-14 17:42:01,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-09-14 17:42:01,553 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:01,554 INFO L376 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:01,554 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:01,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1408889896, now seen corresponding path program 1 times [2018-09-14 17:42:01,555 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:01,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:01,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:01,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:01,556 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 193 proven. 183 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:42:02,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:02,485 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:02,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:02,493 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:02,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 292 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-09-14 17:42:02,869 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 115 proven. 261 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:42:03,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:03,481 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:03,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:03,497 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:03,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 292 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-09-14 17:42:04,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 115 proven. 261 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:42:04,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:04,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-09-14 17:42:04,849 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:04,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-14 17:42:04,850 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-14 17:42:04,851 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2018-09-14 17:42:04,851 INFO L87 Difference]: Start difference. First operand 7623 states and 9258 transitions. Second operand 15 states. [2018-09-14 17:42:07,098 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-09-14 17:42:09,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:09,564 INFO L93 Difference]: Finished difference Result 15603 states and 18993 transitions. [2018-09-14 17:42:09,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-14 17:42:09,564 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 346 [2018-09-14 17:42:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:09,587 INFO L225 Difference]: With dead ends: 15603 [2018-09-14 17:42:09,588 INFO L226 Difference]: Without dead ends: 8139 [2018-09-14 17:42:09,603 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1427 GetRequests, 1383 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2018-09-14 17:42:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8139 states. [2018-09-14 17:42:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8139 to 7672. [2018-09-14 17:42:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7672 states. [2018-09-14 17:42:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7672 states to 7672 states and 8802 transitions. [2018-09-14 17:42:09,735 INFO L78 Accepts]: Start accepts. Automaton has 7672 states and 8802 transitions. Word has length 346 [2018-09-14 17:42:09,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:09,736 INFO L480 AbstractCegarLoop]: Abstraction has 7672 states and 8802 transitions. [2018-09-14 17:42:09,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-14 17:42:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 7672 states and 8802 transitions. [2018-09-14 17:42:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-09-14 17:42:09,758 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:09,759 INFO L376 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:09,759 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:09,759 INFO L82 PathProgramCache]: Analyzing trace with hash 836648684, now seen corresponding path program 1 times [2018-09-14 17:42:09,760 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:09,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:09,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:09,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:09,761 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 211 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:42:10,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:10,245 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:10,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:10,253 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:10,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-14 17:42:11,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-14 17:42:11,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:11,741 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:11,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:11,756 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:12,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-14 17:42:12,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-14 17:42:12,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:12,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 15 [2018-09-14 17:42:12,402 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:12,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-14 17:42:12,403 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-14 17:42:12,403 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-14 17:42:12,404 INFO L87 Difference]: Start difference. First operand 7672 states and 8802 transitions. Second operand 14 states. [2018-09-14 17:42:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:20,092 INFO L93 Difference]: Finished difference Result 15906 states and 18917 transitions. [2018-09-14 17:42:20,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-14 17:42:20,092 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 438 [2018-09-14 17:42:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:20,119 INFO L225 Difference]: With dead ends: 15906 [2018-09-14 17:42:20,119 INFO L226 Difference]: Without dead ends: 8135 [2018-09-14 17:42:20,144 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1873 GetRequests, 1791 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1206, Invalid=4646, Unknown=0, NotChecked=0, Total=5852 [2018-09-14 17:42:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8135 states. [2018-09-14 17:42:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8135 to 7178. [2018-09-14 17:42:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7178 states. [2018-09-14 17:42:20,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7178 states to 7178 states and 8029 transitions. [2018-09-14 17:42:20,267 INFO L78 Accepts]: Start accepts. Automaton has 7178 states and 8029 transitions. Word has length 438 [2018-09-14 17:42:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:20,268 INFO L480 AbstractCegarLoop]: Abstraction has 7178 states and 8029 transitions. [2018-09-14 17:42:20,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-14 17:42:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 7178 states and 8029 transitions. [2018-09-14 17:42:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2018-09-14 17:42:20,288 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:20,288 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:20,288 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:20,289 INFO L82 PathProgramCache]: Analyzing trace with hash -959872180, now seen corresponding path program 1 times [2018-09-14 17:42:20,289 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:20,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:20,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:20,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:20,290 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 348 proven. 265 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-09-14 17:42:21,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:21,340 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:21,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:21,348 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:21,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2018-09-14 17:42:21,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 140 proven. 286 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2018-09-14 17:42:22,182 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:42:22,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [14, 5] total 18 [2018-09-14 17:42:22,182 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:42:22,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:42:22,183 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:42:22,183 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2018-09-14 17:42:22,184 INFO L87 Difference]: Start difference. First operand 7178 states and 8029 transitions. Second operand 5 states. [2018-09-14 17:42:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:23,719 INFO L93 Difference]: Finished difference Result 14026 states and 15737 transitions. [2018-09-14 17:42:23,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:42:23,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 456 [2018-09-14 17:42:23,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:23,739 INFO L225 Difference]: With dead ends: 14026 [2018-09-14 17:42:23,739 INFO L226 Difference]: Without dead ends: 7222 [2018-09-14 17:42:23,750 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 906 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2018-09-14 17:42:23,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7222 states. [2018-09-14 17:42:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7222 to 7114. [2018-09-14 17:42:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7114 states. [2018-09-14 17:42:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 7881 transitions. [2018-09-14 17:42:23,853 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 7881 transitions. Word has length 456 [2018-09-14 17:42:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:23,854 INFO L480 AbstractCegarLoop]: Abstraction has 7114 states and 7881 transitions. [2018-09-14 17:42:23,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:42:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 7881 transitions. [2018-09-14 17:42:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-09-14 17:42:23,876 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:23,876 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:23,876 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:23,877 INFO L82 PathProgramCache]: Analyzing trace with hash -600782073, now seen corresponding path program 1 times [2018-09-14 17:42:23,877 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:23,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:23,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:23,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:23,878 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 506 proven. 471 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-14 17:42:25,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:25,231 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:25,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:25,239 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:25,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 852 proven. 2 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-09-14 17:42:25,751 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:25,886 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-14 17:42:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 500 proven. 105 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2018-09-14 17:42:26,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:26,618 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:26,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:26,633 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:26,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 644 proven. 210 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-09-14 17:42:27,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 211 proven. 674 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-14 17:42:28,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:28,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-09-14 17:42:28,203 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:28,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-14 17:42:28,205 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-14 17:42:28,205 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-09-14 17:42:28,205 INFO L87 Difference]: Start difference. First operand 7114 states and 7881 transitions. Second operand 13 states. [2018-09-14 17:42:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:31,422 INFO L93 Difference]: Finished difference Result 14363 states and 16257 transitions. [2018-09-14 17:42:31,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-14 17:42:31,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 567 [2018-09-14 17:42:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:31,446 INFO L225 Difference]: With dead ends: 14363 [2018-09-14 17:42:31,446 INFO L226 Difference]: Without dead ends: 7412 [2018-09-14 17:42:31,461 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2296 GetRequests, 2258 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2018-09-14 17:42:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7412 states. [2018-09-14 17:42:31,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7412 to 7177. [2018-09-14 17:42:31,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7177 states. [2018-09-14 17:42:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 7802 transitions. [2018-09-14 17:42:31,584 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 7802 transitions. Word has length 567 [2018-09-14 17:42:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:31,585 INFO L480 AbstractCegarLoop]: Abstraction has 7177 states and 7802 transitions. [2018-09-14 17:42:31,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-14 17:42:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 7802 transitions. [2018-09-14 17:42:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2018-09-14 17:42:31,598 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:31,599 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:31,599 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash 506641375, now seen corresponding path program 1 times [2018-09-14 17:42:31,600 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:31,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:31,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:31,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:31,601 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:32,841 WARN L178 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-09-14 17:42:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 653 proven. 656 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2018-09-14 17:42:33,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:33,734 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:33,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:33,742 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:33,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 1162 proven. 2 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2018-09-14 17:42:34,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 466 proven. 144 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2018-09-14 17:42:35,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:35,104 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:35,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:35,120 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:35,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 1079 proven. 8 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2018-09-14 17:42:36,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:36,365 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-14 17:42:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 234 proven. 884 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2018-09-14 17:42:37,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:37,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 8, 8] total 30 [2018-09-14 17:42:37,689 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:37,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-14 17:42:37,692 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-14 17:42:37,693 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2018-09-14 17:42:37,693 INFO L87 Difference]: Start difference. First operand 7177 states and 7802 transitions. Second operand 19 states. [2018-09-14 17:42:41,545 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2018-09-14 17:42:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:45,451 INFO L93 Difference]: Finished difference Result 16847 states and 18786 transitions. [2018-09-14 17:42:45,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-14 17:42:45,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 667 [2018-09-14 17:42:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:45,480 INFO L225 Difference]: With dead ends: 16847 [2018-09-14 17:42:45,480 INFO L226 Difference]: Without dead ends: 9136 [2018-09-14 17:42:45,502 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2747 GetRequests, 2672 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=912, Invalid=3918, Unknown=0, NotChecked=0, Total=4830 [2018-09-14 17:42:45,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2018-09-14 17:42:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 7546. [2018-09-14 17:42:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7546 states. [2018-09-14 17:42:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7546 states to 7546 states and 8093 transitions. [2018-09-14 17:42:45,632 INFO L78 Accepts]: Start accepts. Automaton has 7546 states and 8093 transitions. Word has length 667 [2018-09-14 17:42:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:45,633 INFO L480 AbstractCegarLoop]: Abstraction has 7546 states and 8093 transitions. [2018-09-14 17:42:45,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-14 17:42:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 7546 states and 8093 transitions. [2018-09-14 17:42:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-09-14 17:42:45,646 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:45,647 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 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] [2018-09-14 17:42:45,647 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1657435163, now seen corresponding path program 1 times [2018-09-14 17:42:45,647 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:45,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:45,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:45,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:45,649 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 583 proven. 182 refuted. 0 times theorem prover too weak. 939 trivial. 0 not checked. [2018-09-14 17:42:46,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:46,688 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:46,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:46,696 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:46,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1225 proven. 2 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2018-09-14 17:42:47,316 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 583 proven. 182 refuted. 0 times theorem prover too weak. 939 trivial. 0 not checked. [2018-09-14 17:42:47,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:47,846 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:47,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:47,862 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:48,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1225 proven. 2 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2018-09-14 17:42:48,525 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 583 proven. 182 refuted. 0 times theorem prover too weak. 939 trivial. 0 not checked. [2018-09-14 17:42:48,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:48,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-14 17:42:48,990 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:48,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 17:42:48,992 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 17:42:48,992 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:42:48,993 INFO L87 Difference]: Start difference. First operand 7546 states and 8093 transitions. Second operand 7 states. [2018-09-14 17:42:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:51,019 INFO L93 Difference]: Finished difference Result 20375 states and 23678 transitions. [2018-09-14 17:42:51,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-14 17:42:51,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 747 [2018-09-14 17:42:51,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:51,067 INFO L225 Difference]: With dead ends: 20375 [2018-09-14 17:42:51,067 INFO L226 Difference]: Without dead ends: 13020 [2018-09-14 17:42:51,099 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3004 GetRequests, 2989 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-14 17:42:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13020 states. [2018-09-14 17:42:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13020 to 12654. [2018-09-14 17:42:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12654 states. [2018-09-14 17:42:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12654 states to 12654 states and 13774 transitions. [2018-09-14 17:42:51,340 INFO L78 Accepts]: Start accepts. Automaton has 12654 states and 13774 transitions. Word has length 747 [2018-09-14 17:42:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:51,340 INFO L480 AbstractCegarLoop]: Abstraction has 12654 states and 13774 transitions. [2018-09-14 17:42:51,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 17:42:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 12654 states and 13774 transitions. [2018-09-14 17:42:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-09-14 17:42:51,350 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:51,350 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:51,350 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:51,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2032261219, now seen corresponding path program 1 times [2018-09-14 17:42:51,351 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:51,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:51,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:51,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:51,352 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 462 proven. 357 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2018-09-14 17:42:52,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:52,412 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:52,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:52,420 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:52,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 1281 proven. 2 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2018-09-14 17:42:53,039 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 462 proven. 357 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2018-09-14 17:42:53,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:53,744 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:53,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:53,761 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:54,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 1277 proven. 6 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2018-09-14 17:42:54,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 462 proven. 357 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2018-09-14 17:42:55,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:55,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 8 [2018-09-14 17:42:55,192 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:55,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 17:42:55,193 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 17:42:55,193 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-09-14 17:42:55,194 INFO L87 Difference]: Start difference. First operand 12654 states and 13774 transitions. Second operand 7 states. [2018-09-14 17:42:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:57,360 INFO L93 Difference]: Finished difference Result 26342 states and 28848 transitions. [2018-09-14 17:42:57,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 17:42:57,360 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 807 [2018-09-14 17:42:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:57,381 INFO L225 Difference]: With dead ends: 26342 [2018-09-14 17:42:57,381 INFO L226 Difference]: Without dead ends: 11585 [2018-09-14 17:42:57,410 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3247 GetRequests, 3225 SyntacticMatches, 11 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-09-14 17:42:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2018-09-14 17:42:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 11348. [2018-09-14 17:42:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11348 states. [2018-09-14 17:42:57,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11348 states to 11348 states and 12030 transitions. [2018-09-14 17:42:57,592 INFO L78 Accepts]: Start accepts. Automaton has 11348 states and 12030 transitions. Word has length 807 [2018-09-14 17:42:57,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:57,593 INFO L480 AbstractCegarLoop]: Abstraction has 11348 states and 12030 transitions. [2018-09-14 17:42:57,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 17:42:57,593 INFO L276 IsEmpty]: Start isEmpty. Operand 11348 states and 12030 transitions. [2018-09-14 17:42:57,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2018-09-14 17:42:57,607 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:57,608 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:57,608 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash 177086603, now seen corresponding path program 1 times [2018-09-14 17:42:57,609 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:57,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:57,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:57,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:57,610 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 791 proven. 182 refuted. 0 times theorem prover too weak. 1451 trivial. 0 not checked. [2018-09-14 17:42:58,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:58,856 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:58,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:58,865 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:59,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 1609 proven. 2 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2018-09-14 17:42:59,456 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 791 proven. 182 refuted. 0 times theorem prover too weak. 1451 trivial. 0 not checked. [2018-09-14 17:42:59,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:59,980 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:59,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:59,995 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:00,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 1609 proven. 2 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2018-09-14 17:43:00,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 791 proven. 182 refuted. 0 times theorem prover too weak. 1451 trivial. 0 not checked. [2018-09-14 17:43:01,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:43:01,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-14 17:43:01,263 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:43:01,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 17:43:01,264 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 17:43:01,264 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:43:01,264 INFO L87 Difference]: Start difference. First operand 11348 states and 12030 transitions. Second operand 7 states. [2018-09-14 17:43:04,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:43:04,844 INFO L93 Difference]: Finished difference Result 22414 states and 23776 transitions. [2018-09-14 17:43:04,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 17:43:04,844 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 907 [2018-09-14 17:43:04,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:43:04,867 INFO L225 Difference]: With dead ends: 22414 [2018-09-14 17:43:04,867 INFO L226 Difference]: Without dead ends: 11257 [2018-09-14 17:43:04,884 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3642 GetRequests, 3628 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-09-14 17:43:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2018-09-14 17:43:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 10890. [2018-09-14 17:43:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10890 states. [2018-09-14 17:43:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10890 states to 10890 states and 11480 transitions. [2018-09-14 17:43:05,058 INFO L78 Accepts]: Start accepts. Automaton has 10890 states and 11480 transitions. Word has length 907 [2018-09-14 17:43:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:43:05,059 INFO L480 AbstractCegarLoop]: Abstraction has 10890 states and 11480 transitions. [2018-09-14 17:43:05,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 17:43:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 10890 states and 11480 transitions. [2018-09-14 17:43:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1085 [2018-09-14 17:43:05,076 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:43:05,076 INFO L376 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:43:05,077 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:43:05,077 INFO L82 PathProgramCache]: Analyzing trace with hash -506092004, now seen corresponding path program 1 times [2018-09-14 17:43:05,077 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:43:05,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:05,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:05,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:05,079 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:43:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 1519 proven. 184 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2018-09-14 17:43:06,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:06,844 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:43:06,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:06,854 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:07,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 2217 proven. 6 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2018-09-14 17:43:07,873 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 1519 proven. 257 refuted. 0 times theorem prover too weak. 1924 trivial. 0 not checked. [2018-09-14 17:43:08,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:08,763 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:43:08,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:08,778 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:09,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 2217 proven. 6 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2018-09-14 17:43:09,805 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 1519 proven. 257 refuted. 0 times theorem prover too weak. 1924 trivial. 0 not checked. [2018-09-14 17:43:10,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:43:10,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 15 [2018-09-14 17:43:10,873 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:43:10,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:43:10,874 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:43:10,875 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-09-14 17:43:10,875 INFO L87 Difference]: Start difference. First operand 10890 states and 11480 transitions. Second operand 9 states. [2018-09-14 17:43:13,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:43:13,967 INFO L93 Difference]: Finished difference Result 23979 states and 25346 transitions. [2018-09-14 17:43:13,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-14 17:43:13,968 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1084 [2018-09-14 17:43:13,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:43:13,988 INFO L225 Difference]: With dead ends: 23979 [2018-09-14 17:43:13,989 INFO L226 Difference]: Without dead ends: 13280 [2018-09-14 17:43:14,004 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4352 GetRequests, 4332 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-09-14 17:43:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13280 states. [2018-09-14 17:43:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13280 to 12929. [2018-09-14 17:43:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12929 states. [2018-09-14 17:43:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12929 states to 12929 states and 13670 transitions. [2018-09-14 17:43:14,199 INFO L78 Accepts]: Start accepts. Automaton has 12929 states and 13670 transitions. Word has length 1084 [2018-09-14 17:43:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:43:14,200 INFO L480 AbstractCegarLoop]: Abstraction has 12929 states and 13670 transitions. [2018-09-14 17:43:14,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:43:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand 12929 states and 13670 transitions. [2018-09-14 17:43:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1561 [2018-09-14 17:43:14,224 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:43:14,225 INFO L376 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 7, 7, 6, 6, 6, 6, 6, 5, 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, 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] [2018-09-14 17:43:14,225 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:43:14,226 INFO L82 PathProgramCache]: Analyzing trace with hash -196833108, now seen corresponding path program 1 times [2018-09-14 17:43:14,226 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:43:14,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:14,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:14,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:14,227 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:43:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7401 backedges. 1544 proven. 1157 refuted. 0 times theorem prover too weak. 4700 trivial. 0 not checked. [2018-09-14 17:43:17,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:17,793 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:43:17,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:17,802 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:18,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7401 backedges. 2580 proven. 2 refuted. 0 times theorem prover too weak. 4819 trivial. 0 not checked. [2018-09-14 17:43:19,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7401 backedges. 1553 proven. 105 refuted. 0 times theorem prover too weak. 5743 trivial. 0 not checked. [2018-09-14 17:43:21,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:21,367 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:43:21,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:21,383 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:22,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7401 backedges. 2582 proven. 60 refuted. 0 times theorem prover too weak. 4759 trivial. 0 not checked. [2018-09-14 17:43:23,374 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7401 backedges. 1553 proven. 105 refuted. 0 times theorem prover too weak. 5743 trivial. 0 not checked. [2018-09-14 17:43:26,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:43:26,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 6, 5] total 24 [2018-09-14 17:43:26,471 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:43:26,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-14 17:43:26,474 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-14 17:43:26,474 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2018-09-14 17:43:26,474 INFO L87 Difference]: Start difference. First operand 12929 states and 13670 transitions. Second operand 17 states. [2018-09-14 17:43:32,684 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2018-09-14 17:43:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:43:34,714 INFO L93 Difference]: Finished difference Result 25901 states and 27415 transitions. [2018-09-14 17:43:34,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-14 17:43:34,714 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1560 [2018-09-14 17:43:34,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:43:34,739 INFO L225 Difference]: With dead ends: 25901 [2018-09-14 17:43:34,739 INFO L226 Difference]: Without dead ends: 12807 [2018-09-14 17:43:34,757 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6312 GetRequests, 6252 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=628, Invalid=2794, Unknown=0, NotChecked=0, Total=3422 [2018-09-14 17:43:34,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12807 states. [2018-09-14 17:43:34,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12807 to 11545. [2018-09-14 17:43:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11545 states. [2018-09-14 17:43:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11545 states to 11545 states and 12167 transitions. [2018-09-14 17:43:34,921 INFO L78 Accepts]: Start accepts. Automaton has 11545 states and 12167 transitions. Word has length 1560 [2018-09-14 17:43:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:43:34,922 INFO L480 AbstractCegarLoop]: Abstraction has 11545 states and 12167 transitions. [2018-09-14 17:43:34,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-14 17:43:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 11545 states and 12167 transitions. [2018-09-14 17:43:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1719 [2018-09-14 17:43:34,948 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:43:34,949 INFO L376 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-09-14 17:43:34,949 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:43:34,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1294537528, now seen corresponding path program 1 times [2018-09-14 17:43:34,950 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:43:34,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:34,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:34,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:34,951 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:43:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 4078 proven. 3194 refuted. 0 times theorem prover too weak. 1699 trivial. 0 not checked. [2018-09-14 17:43:42,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:42,368 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:43:42,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:42,377 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:42,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:53,373 WARN L178 SmtUtils]: Spent 6.25 s on a formula simplification that was a NOOP. DAG size: 39 [2018-09-14 17:43:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 2938 proven. 68 refuted. 0 times theorem prover too weak. 5965 trivial. 0 not checked. [2018-09-14 17:43:54,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:44:05,532 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2018-09-14 17:44:13,530 WARN L178 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-09-14 17:44:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 3000 proven. 2 refuted. 125 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-09-14 17:44:26,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:44:26,026 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:44:26,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:44:26,042 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:44:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:44:26,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:44:43,244 WARN L178 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 39 [2018-09-14 17:44:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 2938 proven. 68 refuted. 0 times theorem prover too weak. 5965 trivial. 0 not checked. [2018-09-14 17:44:50,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:45:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 3000 proven. 2 refuted. 125 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-09-14 17:45:00,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:45:00,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 8, 9, 9, 9] total 42 [2018-09-14 17:45:00,836 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:45:00,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-14 17:45:00,837 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-14 17:45:00,838 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1497, Unknown=18, NotChecked=0, Total=1722 [2018-09-14 17:45:00,838 INFO L87 Difference]: Start difference. First operand 11545 states and 12167 transitions. Second operand 34 states. Received shutdown request... [2018-09-14 17:45:21,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 17:45:21,204 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 17:45:21,210 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 17:45:21,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 05:45:21 BoogieIcfgContainer [2018-09-14 17:45:21,211 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 17:45:21,211 INFO L168 Benchmark]: Toolchain (without parser) took 241079.38 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -980.1 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-09-14 17:45:21,212 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 17:45:21,213 INFO L168 Benchmark]: CACSL2BoogieTranslator took 893.61 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. [2018-09-14 17:45:21,214 INFO L168 Benchmark]: Boogie Procedure Inliner took 146.02 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 17:45:21,214 INFO L168 Benchmark]: Boogie Preprocessor took 295.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 788.0 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -890.8 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. [2018-09-14 17:45:21,215 INFO L168 Benchmark]: RCFGBuilder took 4124.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 119.2 MB). Peak memory consumption was 119.2 MB. Max. memory is 7.1 GB. [2018-09-14 17:45:21,216 INFO L168 Benchmark]: TraceAbstraction took 235612.25 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -285.7 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-09-14 17:45:21,221 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 893.61 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 146.02 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 295.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 788.0 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -890.8 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4124.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 119.2 MB). Peak memory consumption was 119.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235612.25 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -285.7 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 109]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 109). Cancelled while BasicCegarLoop was constructing difference of abstraction (11545states) and FLOYD_HOARE automaton (currently 5 states, 34 states before enhancement), while ReachableStatesComputation was computing reachable states (19 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 235.5s OverallTime, 18 OverallIterations, 14 TraceHistogramMax, 92.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1779 SDtfs, 32438 SDslu, 3162 SDs, 0 SdLazy, 43399 SolverSat, 7008 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 67.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38725 GetRequests, 38181 SyntacticMatches, 74 SemanticMatches, 470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6815 ImplicationChecksByTransitivity, 86.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12929occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.6s AutomataMinimizationTime, 17 MinimizatonAttempts, 7912 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 117.9s InterpolantComputationTime, 29752 NumberOfCodeBlocks, 29752 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 48744 ConstructedInterpolants, 606 QuantifiedInterpolants, 195255178 SizeOfPredicates, 61 NumberOfNonLiveVariables, 27527 ConjunctsInSsa, 311 ConjunctsInUnsatCore, 68 InterpolantComputations, 8 PerfectInterpolantSequences, 139331/152189 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label51_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_17-45-21-234.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label51_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_17-45-21-234.csv Completed graceful shutdown