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/Problem17_label14_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 12:10:06,058 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 12:10:06,060 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 12:10:06,072 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 12:10:06,072 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 12:10:06,073 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 12:10:06,074 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 12:10:06,076 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 12:10:06,078 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 12:10:06,079 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 12:10:06,079 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 12:10:06,080 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 12:10:06,081 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 12:10:06,082 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 12:10:06,083 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 12:10:06,084 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 12:10:06,085 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 12:10:06,087 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 12:10:06,088 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 12:10:06,090 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 12:10:06,091 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 12:10:06,092 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 12:10:06,095 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 12:10:06,095 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 12:10:06,095 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 12:10:06,096 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 12:10:06,097 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 12:10:06,098 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 12:10:06,099 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 12:10:06,100 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 12:10:06,100 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 12:10:06,101 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-18 12:10:06,103 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 [2018-09-18 12:10:06,131 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 12:10:06,132 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 12:10:06,133 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 12:10:06,133 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 12:10:06,133 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 12:10:06,133 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 12:10:06,134 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 12:10:06,134 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 12:10:06,134 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 12:10:06,134 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 12:10:06,135 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 12:10:06,135 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 12:10:06,136 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 12:10:06,136 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 12:10:06,136 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 12:10:06,136 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 12:10:06,136 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 12:10:06,137 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 12:10:06,137 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 12:10:06,137 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 12:10:06,137 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 12:10:06,139 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 12:10:06,139 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 12:10:06,139 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 12:10:06,139 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 12:10:06,140 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 12:10:06,140 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 12:10:06,140 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 12:10:06,140 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 12:10:06,141 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 12:10:06,141 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 12:10:06,141 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 12:10:06,141 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 12:10:06,141 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 12:10:06,212 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 12:10:06,225 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 12:10:06,231 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 12:10:06,233 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 12:10:06,233 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 12:10:06,234 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label14_true-unreach-call.c [2018-09-18 12:10:06,581 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c469f7902/2d41d3e52aa3437a94fd197d1878ce8e/FLAG1875d17e7 [2018-09-18 12:10:06,968 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 12:10:06,969 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label14_true-unreach-call.c [2018-09-18 12:10:06,992 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c469f7902/2d41d3e52aa3437a94fd197d1878ce8e/FLAG1875d17e7 [2018-09-18 12:10:07,013 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c469f7902/2d41d3e52aa3437a94fd197d1878ce8e [2018-09-18 12:10:07,026 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 12:10:07,030 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 12:10:07,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 12:10:07,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 12:10:07,041 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 12:10:07,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:10:07" (1/1) ... [2018-09-18 12:10:07,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f06a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:07, skipping insertion in model container [2018-09-18 12:10:07,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:10:07" (1/1) ... [2018-09-18 12:10:07,060 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 12:10:08,187 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:10:08,209 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 12:10:08,595 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:10:08,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:08 WrapperNode [2018-09-18 12:10:08,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 12:10:08,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 12:10:08,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 12:10:08,834 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 12:10:08,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:08" (1/1) ... [2018-09-18 12:10:08,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:08" (1/1) ... [2018-09-18 12:10:09,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 12:10:09,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 12:10:09,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 12:10:09,140 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 12:10:09,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:08" (1/1) ... [2018-09-18 12:10:09,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:08" (1/1) ... [2018-09-18 12:10:09,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:08" (1/1) ... [2018-09-18 12:10:09,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:08" (1/1) ... [2018-09-18 12:10:09,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:08" (1/1) ... [2018-09-18 12:10:09,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:08" (1/1) ... [2018-09-18 12:10:09,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:08" (1/1) ... [2018-09-18 12:10:09,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 12:10:09,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 12:10:09,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 12:10:09,987 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 12:10:09,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:08" (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 [2018-09-18 12:10:10,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 12:10:10,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 12:10:10,058 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-18 12:10:10,058 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-18 12:10:10,059 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 12:10:10,059 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 12:10:10,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 12:10:10,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 12:10:10,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 12:10:10,059 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 12:10:20,997 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 12:10:20,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:10:20 BoogieIcfgContainer [2018-09-18 12:10:20,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 12:10:20,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 12:10:20,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 12:10:21,002 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 12:10:21,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 12:10:07" (1/3) ... [2018-09-18 12:10:21,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d8b255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:10:21, skipping insertion in model container [2018-09-18 12:10:21,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:10:08" (2/3) ... [2018-09-18 12:10:21,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d8b255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:10:21, skipping insertion in model container [2018-09-18 12:10:21,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:10:20" (3/3) ... [2018-09-18 12:10:21,006 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label14_true-unreach-call.c [2018-09-18 12:10:21,016 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 12:10:21,026 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 12:10:21,089 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 12:10:21,089 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 12:10:21,090 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 12:10:21,090 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 12:10:21,090 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 12:10:21,090 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 12:10:21,090 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 12:10:21,090 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 12:10:21,091 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 12:10:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-09-18 12:10:21,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-18 12:10:21,138 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:10:21,139 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:10:21,140 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:10:21,145 INFO L82 PathProgramCache]: Analyzing trace with hash 104391076, now seen corresponding path program 1 times [2018-09-18 12:10:21,147 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:10:21,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:10:21,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:10:21,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:10:21,196 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:10:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:10:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:10:21,688 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:10:21,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 12:10:21,688 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:10:21,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:10:21,711 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:10:21,712 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:10:21,715 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-09-18 12:10:31,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:10:31,010 INFO L93 Difference]: Finished difference Result 2162 states and 4007 transitions. [2018-09-18 12:10:31,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 12:10:31,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2018-09-18 12:10:31,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:10:31,046 INFO L225 Difference]: With dead ends: 2162 [2018-09-18 12:10:31,047 INFO L226 Difference]: Without dead ends: 1552 [2018-09-18 12:10:31,059 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:10:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2018-09-18 12:10:31,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1525. [2018-09-18 12:10:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1525 states. [2018-09-18 12:10:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2696 transitions. [2018-09-18 12:10:31,217 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2696 transitions. Word has length 54 [2018-09-18 12:10:31,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:10:31,218 INFO L480 AbstractCegarLoop]: Abstraction has 1525 states and 2696 transitions. [2018-09-18 12:10:31,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:10:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2696 transitions. [2018-09-18 12:10:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-18 12:10:31,237 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:10:31,238 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:10:31,238 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:10:31,239 INFO L82 PathProgramCache]: Analyzing trace with hash -733218574, now seen corresponding path program 1 times [2018-09-18 12:10:31,239 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:10:31,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:10:31,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:10:31,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:10:31,242 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:10:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:10:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:10:31,658 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:10:31,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:10:31,659 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:10:31,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:10:31,661 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:10:31,661 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:10:31,661 INFO L87 Difference]: Start difference. First operand 1525 states and 2696 transitions. Second operand 6 states. [2018-09-18 12:10:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:10:47,409 INFO L93 Difference]: Finished difference Result 5787 states and 10682 transitions. [2018-09-18 12:10:47,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:10:47,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2018-09-18 12:10:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:10:47,447 INFO L225 Difference]: With dead ends: 5787 [2018-09-18 12:10:47,447 INFO L226 Difference]: Without dead ends: 4268 [2018-09-18 12:10:47,469 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-18 12:10:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2018-09-18 12:10:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 4242. [2018-09-18 12:10:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4242 states. [2018-09-18 12:10:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4242 states to 4242 states and 6360 transitions. [2018-09-18 12:10:47,599 INFO L78 Accepts]: Start accepts. Automaton has 4242 states and 6360 transitions. Word has length 133 [2018-09-18 12:10:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:10:47,600 INFO L480 AbstractCegarLoop]: Abstraction has 4242 states and 6360 transitions. [2018-09-18 12:10:47,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:10:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 4242 states and 6360 transitions. [2018-09-18 12:10:47,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-18 12:10:47,606 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:10:47,609 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, 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] [2018-09-18 12:10:47,609 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:10:47,610 INFO L82 PathProgramCache]: Analyzing trace with hash 9362786, now seen corresponding path program 1 times [2018-09-18 12:10:47,610 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:10:47,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:10:47,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:10:47,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:10:47,611 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:10:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:10:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:10:47,880 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:10:47,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:10:47,881 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:10:47,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:10:47,881 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:10:47,882 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:10:47,882 INFO L87 Difference]: Start difference. First operand 4242 states and 6360 transitions. Second operand 6 states. [2018-09-18 12:10:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:10:56,850 INFO L93 Difference]: Finished difference Result 12710 states and 20700 transitions. [2018-09-18 12:10:56,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:10:56,851 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2018-09-18 12:10:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:10:56,910 INFO L225 Difference]: With dead ends: 12710 [2018-09-18 12:10:56,910 INFO L226 Difference]: Without dead ends: 8474 [2018-09-18 12:10:56,933 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 [2018-09-18 12:10:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8474 states. [2018-09-18 12:10:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8474 to 8389. [2018-09-18 12:10:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8389 states. [2018-09-18 12:10:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8389 states to 8389 states and 12579 transitions. [2018-09-18 12:10:57,192 INFO L78 Accepts]: Start accepts. Automaton has 8389 states and 12579 transitions. Word has length 134 [2018-09-18 12:10:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:10:57,193 INFO L480 AbstractCegarLoop]: Abstraction has 8389 states and 12579 transitions. [2018-09-18 12:10:57,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:10:57,193 INFO L276 IsEmpty]: Start isEmpty. Operand 8389 states and 12579 transitions. [2018-09-18 12:10:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-18 12:10:57,199 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:10:57,199 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:10:57,200 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:10:57,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1511832028, now seen corresponding path program 1 times [2018-09-18 12:10:57,200 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:10:57,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:10:57,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:10:57,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:10:57,202 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:10:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:10:57,531 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:10:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-18 12:10:57,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:10:57,884 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 [2018-09-18 12:10:57,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:10:57,902 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:10:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:10:58,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:10:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:10:58,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:10:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:10:59,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:10:59,329 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 [2018-09-18 12:10:59,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:10:59,360 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:10:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:10:59,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:10:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 12:10:59,936 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:11:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 12:11:00,427 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-09-18 12:11:00,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 5, 5] total 13 [2018-09-18 12:11:00,428 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:11:00,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 12:11:00,430 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 12:11:00,430 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-18 12:11:00,430 INFO L87 Difference]: Start difference. First operand 8389 states and 12579 transitions. Second operand 5 states. [2018-09-18 12:11:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:11:08,077 INFO L93 Difference]: Finished difference Result 20855 states and 31934 transitions. [2018-09-18 12:11:08,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 12:11:08,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 208 [2018-09-18 12:11:08,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:11:08,189 INFO L225 Difference]: With dead ends: 20855 [2018-09-18 12:11:08,190 INFO L226 Difference]: Without dead ends: 12437 [2018-09-18 12:11:08,253 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 821 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-09-18 12:11:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12437 states. [2018-09-18 12:11:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12437 to 12427. [2018-09-18 12:11:08,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12427 states. [2018-09-18 12:11:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12427 states to 12427 states and 17255 transitions. [2018-09-18 12:11:08,601 INFO L78 Accepts]: Start accepts. Automaton has 12427 states and 17255 transitions. Word has length 208 [2018-09-18 12:11:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:11:08,602 INFO L480 AbstractCegarLoop]: Abstraction has 12427 states and 17255 transitions. [2018-09-18 12:11:08,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 12:11:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 12427 states and 17255 transitions. [2018-09-18 12:11:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-09-18 12:11:08,609 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:11:08,610 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:11:08,611 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:11:08,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1311071484, now seen corresponding path program 1 times [2018-09-18 12:11:08,611 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:11:08,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:11:08,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:11:08,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:11:08,614 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:11:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:11:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-09-18 12:11:09,006 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:11:09,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 12:11:09,006 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:11:09,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:11:09,007 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:11:09,007 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:11:09,008 INFO L87 Difference]: Start difference. First operand 12427 states and 17255 transitions. Second operand 4 states. [2018-09-18 12:11:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:11:17,841 INFO L93 Difference]: Finished difference Result 32371 states and 48139 transitions. [2018-09-18 12:11:17,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 12:11:17,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2018-09-18 12:11:17,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:11:17,906 INFO L225 Difference]: With dead ends: 32371 [2018-09-18 12:11:17,907 INFO L226 Difference]: Without dead ends: 15849 [2018-09-18 12:11:18,176 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 [2018-09-18 12:11:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15849 states. [2018-09-18 12:11:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15849 to 13161. [2018-09-18 12:11:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13161 states. [2018-09-18 12:11:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13161 states to 13161 states and 16875 transitions. [2018-09-18 12:11:18,477 INFO L78 Accepts]: Start accepts. Automaton has 13161 states and 16875 transitions. Word has length 221 [2018-09-18 12:11:18,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:11:18,478 INFO L480 AbstractCegarLoop]: Abstraction has 13161 states and 16875 transitions. [2018-09-18 12:11:18,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:11:18,479 INFO L276 IsEmpty]: Start isEmpty. Operand 13161 states and 16875 transitions. [2018-09-18 12:11:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-09-18 12:11:18,486 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:11:18,486 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:11:18,487 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:11:18,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1606849281, now seen corresponding path program 1 times [2018-09-18 12:11:18,487 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:11:18,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:11:18,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:11:18,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:11:18,489 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:11:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:11:19,164 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-18 12:11:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 95 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-09-18 12:11:19,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:11:19,839 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:11:19,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:11:19,859 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:11:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:11:19,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:11:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-09-18 12:11:21,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:11:21,971 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-09-18 12:11:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 99 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:11:22,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:11:22,515 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 5 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:11:22,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:11:22,531 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:11:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:11:22,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:11:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-09-18 12:11:22,984 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:11:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 99 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:11:24,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:11:24,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8] total 18 [2018-09-18 12:11:24,027 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:11:24,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 12:11:24,028 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 12:11:24,035 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2018-09-18 12:11:24,035 INFO L87 Difference]: Start difference. First operand 13161 states and 16875 transitions. Second operand 13 states. [2018-09-18 12:11:24,635 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-18 12:12:43,768 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-18 12:12:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:12:44,032 INFO L93 Difference]: Finished difference Result 89572 states and 121539 transitions. [2018-09-18 12:12:44,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-18 12:12:44,033 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 284 [2018-09-18 12:12:44,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:12:44,310 INFO L225 Difference]: With dead ends: 89572 [2018-09-18 12:12:44,310 INFO L226 Difference]: Without dead ends: 65080 [2018-09-18 12:12:44,415 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1263 GetRequests, 1124 SyntacticMatches, 6 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6794 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2610, Invalid=15480, Unknown=0, NotChecked=0, Total=18090 [2018-09-18 12:12:44,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65080 states. [2018-09-18 12:12:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65080 to 60794. [2018-09-18 12:12:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60794 states. [2018-09-18 12:12:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60794 states to 60794 states and 74286 transitions. [2018-09-18 12:12:45,829 INFO L78 Accepts]: Start accepts. Automaton has 60794 states and 74286 transitions. Word has length 284 [2018-09-18 12:12:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:12:45,829 INFO L480 AbstractCegarLoop]: Abstraction has 60794 states and 74286 transitions. [2018-09-18 12:12:45,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-18 12:12:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 60794 states and 74286 transitions. [2018-09-18 12:12:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-09-18 12:12:45,851 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:12:45,852 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, 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, 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] [2018-09-18 12:12:45,852 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:12:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1354231450, now seen corresponding path program 1 times [2018-09-18 12:12:45,853 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:12:45,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:12:45,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:12:45,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:12:45,854 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:12:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:12:46,983 WARN L178 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-09-18 12:12:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 145 proven. 17 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-09-18 12:12:47,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:12:47,430 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 [2018-09-18 12:12:47,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:12:47,446 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:12:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:12:47,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:12:48,125 WARN L178 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2018-09-18 12:12:48,766 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-18 12:12:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 377 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-18 12:12:48,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:12:49,433 WARN L178 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-09-18 12:12:50,096 WARN L178 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-09-18 12:12:50,221 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 12:12:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 147 proven. 275 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:12:50,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:12:50,945 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 [2018-09-18 12:12:50,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:12:50,961 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:12:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:12:51,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:12:51,861 WARN L178 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2018-09-18 12:12:52,809 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-18 12:12:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 377 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-18 12:12:53,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:12:53,353 WARN L178 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-09-18 12:12:53,802 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 12:12:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 147 proven. 275 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:12:55,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:12:55,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 8] total 27 [2018-09-18 12:12:55,221 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:12:55,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-18 12:12:55,222 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-18 12:12:55,223 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2018-09-18 12:12:55,223 INFO L87 Difference]: Start difference. First operand 60794 states and 74286 transitions. Second operand 15 states. [2018-09-18 12:13:15,654 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-09-18 12:13:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:13:21,581 INFO L93 Difference]: Finished difference Result 153461 states and 188478 transitions. [2018-09-18 12:13:21,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-18 12:13:21,581 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 394 [2018-09-18 12:13:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:13:21,841 INFO L225 Difference]: With dead ends: 153461 [2018-09-18 12:13:21,842 INFO L226 Difference]: Without dead ends: 85699 [2018-09-18 12:13:21,964 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1634 GetRequests, 1556 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=995, Invalid=4407, Unknown=0, NotChecked=0, Total=5402 [2018-09-18 12:13:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85699 states. [2018-09-18 12:13:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85699 to 83772. [2018-09-18 12:13:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83772 states. [2018-09-18 12:13:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83772 states to 83772 states and 99879 transitions. [2018-09-18 12:13:23,287 INFO L78 Accepts]: Start accepts. Automaton has 83772 states and 99879 transitions. Word has length 394 [2018-09-18 12:13:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:13:23,288 INFO L480 AbstractCegarLoop]: Abstraction has 83772 states and 99879 transitions. [2018-09-18 12:13:23,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-18 12:13:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 83772 states and 99879 transitions. [2018-09-18 12:13:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2018-09-18 12:13:23,307 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:13:23,307 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 12:13:23,308 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:13:23,308 INFO L82 PathProgramCache]: Analyzing trace with hash 863350675, now seen corresponding path program 1 times [2018-09-18 12:13:23,308 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:13:23,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:13:23,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:13:23,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:13:23,309 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:13:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:13:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2018-09-18 12:13:24,239 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:13:24,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 12:13:24,239 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:13:24,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:13:24,239 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:13:24,240 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:13:24,240 INFO L87 Difference]: Start difference. First operand 83772 states and 99879 transitions. Second operand 4 states. [2018-09-18 12:13:29,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:13:29,132 INFO L93 Difference]: Finished difference Result 176012 states and 213902 transitions. [2018-09-18 12:13:29,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 12:13:29,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 455 [2018-09-18 12:13:29,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:13:29,437 INFO L225 Difference]: With dead ends: 176012 [2018-09-18 12:13:29,437 INFO L226 Difference]: Without dead ends: 100696 [2018-09-18 12:13:29,561 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:13:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100696 states. [2018-09-18 12:13:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100696 to 98952. [2018-09-18 12:13:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98952 states. [2018-09-18 12:13:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98952 states to 98952 states and 115673 transitions. [2018-09-18 12:13:31,041 INFO L78 Accepts]: Start accepts. Automaton has 98952 states and 115673 transitions. Word has length 455 [2018-09-18 12:13:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:13:31,042 INFO L480 AbstractCegarLoop]: Abstraction has 98952 states and 115673 transitions. [2018-09-18 12:13:31,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:13:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 98952 states and 115673 transitions. [2018-09-18 12:13:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2018-09-18 12:13:31,074 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:13:31,074 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:13:31,076 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:13:31,076 INFO L82 PathProgramCache]: Analyzing trace with hash 911489126, now seen corresponding path program 1 times [2018-09-18 12:13:31,076 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:13:31,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:13:31,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:13:31,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:13:31,077 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:13:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:13:31,780 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-18 12:13:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 453 proven. 121 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-09-18 12:13:32,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:13:32,908 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 [2018-09-18 12:13:32,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:13:32,915 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:13:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:13:33,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:13:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2018-09-18 12:13:33,215 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:13:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2018-09-18 12:13:33,453 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 12:13:33,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-09-18 12:13:33,453 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:13:33,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:13:33,454 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:13:33,454 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:13:33,455 INFO L87 Difference]: Start difference. First operand 98952 states and 115673 transitions. Second operand 3 states. [2018-09-18 12:13:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:13:36,985 INFO L93 Difference]: Finished difference Result 177973 states and 210129 transitions. [2018-09-18 12:13:36,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:13:36,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 542 [2018-09-18 12:13:36,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:13:37,249 INFO L225 Difference]: With dead ends: 177973 [2018-09-18 12:13:37,250 INFO L226 Difference]: Without dead ends: 92636 [2018-09-18 12:13:37,354 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1094 GetRequests, 1085 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:13:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92636 states. [2018-09-18 12:13:38,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92636 to 90095. [2018-09-18 12:13:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90095 states. [2018-09-18 12:13:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90095 states to 90095 states and 105935 transitions. [2018-09-18 12:13:38,919 INFO L78 Accepts]: Start accepts. Automaton has 90095 states and 105935 transitions. Word has length 542 [2018-09-18 12:13:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:13:38,920 INFO L480 AbstractCegarLoop]: Abstraction has 90095 states and 105935 transitions. [2018-09-18 12:13:38,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:13:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 90095 states and 105935 transitions. [2018-09-18 12:13:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2018-09-18 12:13:38,959 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:13:38,960 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, 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:13:38,960 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:13:38,960 INFO L82 PathProgramCache]: Analyzing trace with hash 357807604, now seen corresponding path program 1 times [2018-09-18 12:13:38,960 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:13:38,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:13:38,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:13:38,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:13:38,962 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:13:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:13:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 770 proven. 6 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-09-18 12:13:39,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:13:39,498 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:13:39,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:13:39,507 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:13:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:13:39,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:13:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 770 proven. 6 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-09-18 12:13:39,917 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:13:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 770 proven. 76 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-09-18 12:13:41,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:13:41,172 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 10 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:13:41,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:13:41,188 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:13:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:13:41,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:13:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 770 proven. 6 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-09-18 12:13:41,756 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:13:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 770 proven. 76 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-09-18 12:13:42,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:13:42,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 13 [2018-09-18 12:13:42,148 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:13:42,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-18 12:13:42,149 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-18 12:13:42,149 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-18 12:13:42,151 INFO L87 Difference]: Start difference. First operand 90095 states and 105935 transitions. Second operand 8 states. Received shutdown request... [2018-09-18 12:13:59,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-18 12:13:59,071 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 12:13:59,076 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 12:13:59,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 12:13:59 BoogieIcfgContainer [2018-09-18 12:13:59,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 12:13:59,077 INFO L168 Benchmark]: Toolchain (without parser) took 232050.36 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-09-18 12:13:59,078 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-09-18 12:13:59,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1802.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 190.3 MB). Peak memory consumption was 190.3 MB. Max. memory is 7.1 GB. [2018-09-18 12:13:59,080 INFO L168 Benchmark]: Boogie Procedure Inliner took 305.72 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-09-18 12:13:59,080 INFO L168 Benchmark]: Boogie Preprocessor took 846.24 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 953.7 MB). Free memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. [2018-09-18 12:13:59,081 INFO L168 Benchmark]: RCFGBuilder took 11011.42 ms. Allocated memory is still 2.5 GB. Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 462.0 MB). Peak memory consumption was 462.0 MB. Max. memory is 7.1 GB. [2018-09-18 12:13:59,082 INFO L168 Benchmark]: TraceAbstraction took 218077.72 ms. Allocated memory was 2.5 GB in the beginning and 3.8 GB in the end (delta: 1.3 GB). Free memory was 1.9 GB in the beginning and 2.5 GB in the end (delta: -638.2 MB). Peak memory consumption was 641.6 MB. Max. memory is 7.1 GB. [2018-09-18 12:13:59,087 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1802.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 190.3 MB). Peak memory consumption was 190.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 305.72 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 846.24 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 953.7 MB). Free memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11011.42 ms. Allocated memory is still 2.5 GB. Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 462.0 MB). Peak memory consumption was 462.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218077.72 ms. Allocated memory was 2.5 GB in the beginning and 3.8 GB in the end (delta: 1.3 GB). Free memory was 1.9 GB in the beginning and 2.5 GB in the end (delta: -638.2 MB). Peak memory consumption was 641.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 149]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 149). Cancelled while BasicCegarLoop was constructing difference of abstraction (90095states) and FLOYD_HOARE automaton (currently 18 states, 8 states before enhancement), while ReachableStatesComputation was computing reachable states (104169 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 217.9s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 184.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2859 SDtfs, 35058 SDslu, 4285 SDs, 0 SdLazy, 69027 SolverSat, 10409 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 152.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7371 GetRequests, 7082 SyntacticMatches, 24 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8527 ImplicationChecksByTransitivity, 17.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98952occurred in iteration=8, 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: 6.9s AutomataMinimizationTime, 9 MinimizatonAttempts, 13334 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 21.5s InterpolantComputationTime, 6596 NumberOfCodeBlocks, 6596 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 10120 ConstructedInterpolants, 392 QuantifiedInterpolants, 17667890 SizeOfPredicates, 15 NumberOfNonLiveVariables, 5677 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 28 InterpolantComputations, 9 PerfectInterpolantSequences, 11150/12250 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/Problem17_label14_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_12-13-59-110.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label14_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_12-13-59-110.csv Completed graceful shutdown