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_label44_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 18:05:48,152 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 18:05:48,154 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 18:05:48,166 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 18:05:48,166 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 18:05:48,167 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 18:05:48,169 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 18:05:48,170 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 18:05:48,172 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 18:05:48,173 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 18:05:48,174 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 18:05:48,174 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 18:05:48,175 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 18:05:48,176 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 18:05:48,177 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 18:05:48,178 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 18:05:48,179 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 18:05:48,181 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 18:05:48,183 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 18:05:48,184 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 18:05:48,185 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 18:05:48,187 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 18:05:48,189 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 18:05:48,190 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 18:05:48,190 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 18:05:48,191 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 18:05:48,192 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 18:05:48,193 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 18:05:48,193 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 18:05:48,195 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 18:05:48,195 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 18:05:48,196 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 18:05:48,196 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 18:05:48,196 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 18:05:48,197 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 18:05:48,198 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 18:05:48,198 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 18:05:48,220 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 18:05:48,220 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 18:05:48,221 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 18:05:48,221 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 18:05:48,222 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 18:05:48,222 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 18:05:48,222 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 18:05:48,223 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 18:05:48,223 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 18:05:48,223 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 18:05:48,223 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 18:05:48,224 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 18:05:48,224 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 18:05:48,224 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 18:05:48,225 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 18:05:48,225 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 18:05:48,225 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 18:05:48,225 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 18:05:48,225 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 18:05:48,226 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 18:05:48,226 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 18:05:48,226 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 18:05:48,226 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 18:05:48,226 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 18:05:48,227 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 18:05:48,227 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 18:05:48,227 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 18:05:48,227 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 18:05:48,229 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 18:05:48,229 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 18:05:48,229 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 18:05:48,229 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 18:05:48,230 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 18:05:48,273 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 18:05:48,286 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 18:05:48,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 18:05:48,296 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 18:05:48,296 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 18:05:48,297 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label44_true-unreach-call.c [2018-09-14 18:05:48,670 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43f4ce509/d00097d30e2c4d5a9f380c75cba8d4b6/FLAGc79e4be2d [2018-09-14 18:05:49,062 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 18:05:49,063 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label44_true-unreach-call.c [2018-09-14 18:05:49,085 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43f4ce509/d00097d30e2c4d5a9f380c75cba8d4b6/FLAGc79e4be2d [2018-09-14 18:05:49,101 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43f4ce509/d00097d30e2c4d5a9f380c75cba8d4b6 [2018-09-14 18:05:49,113 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 18:05:49,117 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 18:05:49,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 18:05:49,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 18:05:49,125 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 18:05:49,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 06:05:49" (1/1) ... [2018-09-14 18:05:49,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a21620d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:49, skipping insertion in model container [2018-09-14 18:05:49,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 06:05:49" (1/1) ... [2018-09-14 18:05:49,142 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 18:05:50,158 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 18:05:50,183 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 18:05:50,652 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 18:05:50,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:50 WrapperNode [2018-09-14 18:05:50,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 18:05:50,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 18:05:50,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 18:05:50,864 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 18:05:50,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:50" (1/1) ... [2018-09-14 18:05:50,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:50" (1/1) ... [2018-09-14 18:05:51,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 18:05:51,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 18:05:51,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 18:05:51,122 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 18:05:51,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:50" (1/1) ... [2018-09-14 18:05:51,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:50" (1/1) ... [2018-09-14 18:05:51,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:50" (1/1) ... [2018-09-14 18:05:51,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:50" (1/1) ... [2018-09-14 18:05:51,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:50" (1/1) ... [2018-09-14 18:05:51,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:50" (1/1) ... [2018-09-14 18:05:51,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:50" (1/1) ... [2018-09-14 18:05:52,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 18:05:52,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 18:05:52,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 18:05:52,061 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 18:05:52,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:50" (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 18:05:52,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 18:05:52,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 18:05:52,141 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-14 18:05:52,141 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-14 18:05:52,142 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 18:05:52,142 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 18:05:52,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 18:05:52,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 18:05:52,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 18:05:52,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 18:06:05,938 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 18:06:05,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 06:06:05 BoogieIcfgContainer [2018-09-14 18:06:05,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 18:06:05,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 18:06:05,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 18:06:05,947 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 18:06:05,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 06:05:49" (1/3) ... [2018-09-14 18:06:05,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6356439c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 06:06:05, skipping insertion in model container [2018-09-14 18:06:05,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:05:50" (2/3) ... [2018-09-14 18:06:05,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6356439c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 06:06:05, skipping insertion in model container [2018-09-14 18:06:05,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 06:06:05" (3/3) ... [2018-09-14 18:06:05,953 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label44_true-unreach-call.c [2018-09-14 18:06:05,963 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 18:06:05,974 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 18:06:06,046 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 18:06:06,047 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 18:06:06,047 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 18:06:06,047 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 18:06:06,048 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 18:06:06,048 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 18:06:06,048 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 18:06:06,048 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 18:06:06,048 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 18:06:06,085 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-09-14 18:06:06,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-14 18:06:06,094 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:06:06,095 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 18:06:06,096 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:06:06,102 INFO L82 PathProgramCache]: Analyzing trace with hash 203482100, now seen corresponding path program 1 times [2018-09-14 18:06:06,105 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:06:06,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:06:06,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:06:06,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:06:06,159 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:06:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:06:06,671 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 18:06:06,674 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:06:06,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 18:06:06,674 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:06:06,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 18:06:06,697 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 18:06:06,698 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 18:06:06,701 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-09-14 18:06:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:06:18,766 INFO L93 Difference]: Finished difference Result 2118 states and 3937 transitions. [2018-09-14 18:06:18,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 18:06:18,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-09-14 18:06:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:06:18,803 INFO L225 Difference]: With dead ends: 2118 [2018-09-14 18:06:18,803 INFO L226 Difference]: Without dead ends: 1508 [2018-09-14 18:06:18,814 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 [2018-09-14 18:06:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2018-09-14 18:06:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1039. [2018-09-14 18:06:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2018-09-14 18:06:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1596 transitions. [2018-09-14 18:06:18,955 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1596 transitions. Word has length 42 [2018-09-14 18:06:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:06:18,956 INFO L480 AbstractCegarLoop]: Abstraction has 1039 states and 1596 transitions. [2018-09-14 18:06:18,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 18:06:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1596 transitions. [2018-09-14 18:06:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-14 18:06:18,968 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:06:18,969 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] [2018-09-14 18:06:18,969 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:06:18,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2133934966, now seen corresponding path program 1 times [2018-09-14 18:06:18,972 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:06:18,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:06:18,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:06:18,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:06:18,973 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:06:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:06:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:06:19,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:06:19,522 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 18:06:19,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:06:19,541 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:06:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:06:19,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:06:48,491 WARN L178 SmtUtils]: Spent 24.23 s on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2018-09-14 18:07:08,793 WARN L178 SmtUtils]: Spent 16.12 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2018-09-14 18:07:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:07:09,185 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:07:09,817 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-09-14 18:07:09,919 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-09-14 18:07:14,125 WARN L178 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2018-09-14 18:07:14,450 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-09-14 18:07:17,143 WARN L178 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-09-14 18:07:17,486 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 18:07:17,519 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 18:07:17,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-09-14 18:07:17,520 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:07:17,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 18:07:17,522 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 18:07:17,522 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=160, Unknown=5, NotChecked=0, Total=210 [2018-09-14 18:07:17,523 INFO L87 Difference]: Start difference. First operand 1039 states and 1596 transitions. Second operand 6 states. [2018-09-14 18:08:32,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:08:32,574 INFO L93 Difference]: Finished difference Result 3901 states and 6143 transitions. [2018-09-14 18:08:32,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 18:08:32,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2018-09-14 18:08:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:08:32,609 INFO L225 Difference]: With dead ends: 3901 [2018-09-14 18:08:32,609 INFO L226 Difference]: Without dead ends: 2868 [2018-09-14 18:08:32,618 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=45, Invalid=160, Unknown=5, NotChecked=0, Total=210 [2018-09-14 18:08:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2018-09-14 18:08:32,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2839. [2018-09-14 18:08:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2839 states. [2018-09-14 18:08:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 4213 transitions. [2018-09-14 18:08:32,728 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 4213 transitions. Word has length 117 [2018-09-14 18:08:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:08:32,729 INFO L480 AbstractCegarLoop]: Abstraction has 2839 states and 4213 transitions. [2018-09-14 18:08:32,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 18:08:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 4213 transitions. [2018-09-14 18:08:32,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-14 18:08:32,736 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:08:32,737 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] [2018-09-14 18:08:32,737 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:08:32,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2131862897, now seen corresponding path program 1 times [2018-09-14 18:08:32,738 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:08:32,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:08:32,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:08:32,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:08:32,739 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:08:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:08:33,003 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 18:08:33,004 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:08:33,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 18:08:33,004 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:08:33,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 18:08:33,005 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 18:08:33,005 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 18:08:33,006 INFO L87 Difference]: Start difference. First operand 2839 states and 4213 transitions. Second operand 4 states. [2018-09-14 18:08:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:08:40,192 INFO L93 Difference]: Finished difference Result 10466 states and 16129 transitions. [2018-09-14 18:08:40,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 18:08:40,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2018-09-14 18:08:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:08:40,251 INFO L225 Difference]: With dead ends: 10466 [2018-09-14 18:08:40,251 INFO L226 Difference]: Without dead ends: 7633 [2018-09-14 18:08:40,277 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 18:08:40,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2018-09-14 18:08:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 7631. [2018-09-14 18:08:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7631 states. [2018-09-14 18:08:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7631 states to 7631 states and 10972 transitions. [2018-09-14 18:08:40,513 INFO L78 Accepts]: Start accepts. Automaton has 7631 states and 10972 transitions. Word has length 152 [2018-09-14 18:08:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:08:40,513 INFO L480 AbstractCegarLoop]: Abstraction has 7631 states and 10972 transitions. [2018-09-14 18:08:40,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 18:08:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 7631 states and 10972 transitions. [2018-09-14 18:08:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-14 18:08:40,520 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:08:40,521 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] [2018-09-14 18:08:40,521 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:08:40,523 INFO L82 PathProgramCache]: Analyzing trace with hash 361445737, now seen corresponding path program 1 times [2018-09-14 18:08:40,523 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:08:40,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:08:40,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:08:40,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:08:40,524 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:08:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:08:40,870 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 18:08:40,870 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:08:40,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-14 18:08:40,871 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:08:40,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 18:08:40,872 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 18:08:40,872 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-14 18:08:40,873 INFO L87 Difference]: Start difference. First operand 7631 states and 10972 transitions. Second operand 5 states. [2018-09-14 18:08:56,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:08:56,900 INFO L93 Difference]: Finished difference Result 23774 states and 36009 transitions. [2018-09-14 18:08:56,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 18:08:56,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2018-09-14 18:08:56,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:08:56,992 INFO L225 Difference]: With dead ends: 23774 [2018-09-14 18:08:56,992 INFO L226 Difference]: Without dead ends: 16149 [2018-09-14 18:08:57,028 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 18:08:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16149 states. [2018-09-14 18:08:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16149 to 16114. [2018-09-14 18:08:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16114 states. [2018-09-14 18:08:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16114 states to 16114 states and 22498 transitions. [2018-09-14 18:08:57,421 INFO L78 Accepts]: Start accepts. Automaton has 16114 states and 22498 transitions. Word has length 180 [2018-09-14 18:08:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:08:57,422 INFO L480 AbstractCegarLoop]: Abstraction has 16114 states and 22498 transitions. [2018-09-14 18:08:57,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 18:08:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 16114 states and 22498 transitions. [2018-09-14 18:08:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-14 18:08:57,428 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:08:57,429 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, 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 18:08:57,429 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:08:57,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2127998129, now seen corresponding path program 1 times [2018-09-14 18:08:57,429 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:08:57,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:08:57,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:08:57,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:08:57,431 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:08:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:08:57,701 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 18:08:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-14 18:08:57,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:08:57,799 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 18:08:57,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:08:57,814 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:08:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:08:57,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:08:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:08:58,181 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:08:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:08:58,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:08:58,339 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 4 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 18:08:58,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:08:58,355 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:08:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:08:58,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:08:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 18:08:58,627 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:08:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 18:08:58,845 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 18:08:58,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 11 [2018-09-14 18:08:58,846 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:08:58,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 18:08:58,847 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 18:08:58,847 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 18:08:58,848 INFO L87 Difference]: Start difference. First operand 16114 states and 22498 transitions. Second operand 5 states. [2018-09-14 18:09:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:09:04,056 INFO L93 Difference]: Finished difference Result 32395 states and 45632 transitions. [2018-09-14 18:09:04,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 18:09:04,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2018-09-14 18:09:04,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:09:04,118 INFO L225 Difference]: With dead ends: 32395 [2018-09-14 18:09:04,118 INFO L226 Difference]: Without dead ends: 16287 [2018-09-14 18:09:04,165 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 814 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-14 18:09:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16287 states. [2018-09-14 18:09:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16287 to 15811. [2018-09-14 18:09:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15811 states. [2018-09-14 18:09:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15811 states to 15811 states and 19760 transitions. [2018-09-14 18:09:04,492 INFO L78 Accepts]: Start accepts. Automaton has 15811 states and 19760 transitions. Word has length 206 [2018-09-14 18:09:04,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:09:04,492 INFO L480 AbstractCegarLoop]: Abstraction has 15811 states and 19760 transitions. [2018-09-14 18:09:04,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 18:09:04,492 INFO L276 IsEmpty]: Start isEmpty. Operand 15811 states and 19760 transitions. [2018-09-14 18:09:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-14 18:09:04,500 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:09:04,501 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, 1, 1, 1, 1, 1, 1, 1, 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 18:09:04,501 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:09:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash -142067192, now seen corresponding path program 1 times [2018-09-14 18:09:04,501 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:09:04,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:09:04,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:09:04,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:09:04,503 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:09:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:09:04,804 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 18:09:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 71 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-14 18:09:05,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:09:05,133 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 18:09:05,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:09:05,141 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:09:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:09:05,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:09:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:09:05,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:09:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:09:05,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:09:05,563 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 6 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 18:09:05,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:09:05,579 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:09:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:09:05,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:09:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 18:09:05,799 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:09:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 18:09:05,920 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 18:09:05,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 12 [2018-09-14 18:09:05,921 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:09:05,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 18:09:05,921 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 18:09:05,921 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-14 18:09:05,922 INFO L87 Difference]: Start difference. First operand 15811 states and 19760 transitions. Second operand 5 states. [2018-09-14 18:09:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:09:11,409 INFO L93 Difference]: Finished difference Result 32573 states and 40954 transitions. [2018-09-14 18:09:11,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 18:09:11,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 213 [2018-09-14 18:09:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:09:11,456 INFO L225 Difference]: With dead ends: 32573 [2018-09-14 18:09:11,457 INFO L226 Difference]: Without dead ends: 16768 [2018-09-14 18:09:11,487 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 842 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-14 18:09:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16768 states. [2018-09-14 18:09:11,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16768 to 16308. [2018-09-14 18:09:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16308 states. [2018-09-14 18:09:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16308 states to 16308 states and 18972 transitions. [2018-09-14 18:09:11,772 INFO L78 Accepts]: Start accepts. Automaton has 16308 states and 18972 transitions. Word has length 213 [2018-09-14 18:09:11,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:09:11,772 INFO L480 AbstractCegarLoop]: Abstraction has 16308 states and 18972 transitions. [2018-09-14 18:09:11,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 18:09:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 16308 states and 18972 transitions. [2018-09-14 18:09:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-09-14 18:09:11,779 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:09:11,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:09:11,779 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:09:11,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1274034599, now seen corresponding path program 1 times [2018-09-14 18:09:11,780 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:09:11,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:09:11,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:09:11,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:09:11,781 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:09:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:09:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-14 18:09:11,977 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:09:11,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 18:09:11,977 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:09:11,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 18:09:11,978 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 18:09:11,978 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:09:11,978 INFO L87 Difference]: Start difference. First operand 16308 states and 18972 transitions. Second operand 3 states. [2018-09-14 18:09:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:09:17,841 INFO L93 Difference]: Finished difference Result 37026 states and 43923 transitions. [2018-09-14 18:09:17,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 18:09:17,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2018-09-14 18:09:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:09:17,902 INFO L225 Difference]: With dead ends: 37026 [2018-09-14 18:09:17,903 INFO L226 Difference]: Without dead ends: 20724 [2018-09-14 18:09:17,932 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:09:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20724 states. [2018-09-14 18:09:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20724 to 20274. [2018-09-14 18:09:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20274 states. [2018-09-14 18:09:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20274 states to 20274 states and 23973 transitions. [2018-09-14 18:09:18,294 INFO L78 Accepts]: Start accepts. Automaton has 20274 states and 23973 transitions. Word has length 219 [2018-09-14 18:09:18,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:09:18,295 INFO L480 AbstractCegarLoop]: Abstraction has 20274 states and 23973 transitions. [2018-09-14 18:09:18,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 18:09:18,295 INFO L276 IsEmpty]: Start isEmpty. Operand 20274 states and 23973 transitions. [2018-09-14 18:09:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-14 18:09:18,303 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:09:18,304 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, 1, 1, 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 18:09:18,304 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:09:18,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1096684433, now seen corresponding path program 1 times [2018-09-14 18:09:18,304 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:09:18,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:09:18,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:09:18,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:09:18,306 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:09:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:09:18,950 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-14 18:09:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 70 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 18:09:19,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:09:19,554 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 18:09:19,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:09:19,568 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:09:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:09:19,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:09:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-09-14 18:09:20,168 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:09:21,429 WARN L178 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2018-09-14 18:09:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 70 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 18:09:21,765 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 18:09:21,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 18:09:21,766 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:09:21,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 18:09:21,767 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 18:09:21,767 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-09-14 18:09:21,767 INFO L87 Difference]: Start difference. First operand 20274 states and 23973 transitions. Second operand 5 states. [2018-09-14 18:09:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:09:30,905 INFO L93 Difference]: Finished difference Result 48035 states and 56398 transitions. [2018-09-14 18:09:30,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 18:09:30,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 246 [2018-09-14 18:09:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:09:30,979 INFO L225 Difference]: With dead ends: 48035 [2018-09-14 18:09:30,980 INFO L226 Difference]: Without dead ends: 25608 [2018-09-14 18:09:31,018 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 488 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-09-14 18:09:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25608 states. [2018-09-14 18:09:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25608 to 24202. [2018-09-14 18:09:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24202 states. [2018-09-14 18:09:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24202 states to 24202 states and 28480 transitions. [2018-09-14 18:09:31,426 INFO L78 Accepts]: Start accepts. Automaton has 24202 states and 28480 transitions. Word has length 246 [2018-09-14 18:09:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:09:31,426 INFO L480 AbstractCegarLoop]: Abstraction has 24202 states and 28480 transitions. [2018-09-14 18:09:31,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 18:09:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 24202 states and 28480 transitions. [2018-09-14 18:09:31,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-14 18:09:31,438 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:09:31,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:31,439 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:09:31,439 INFO L82 PathProgramCache]: Analyzing trace with hash 676272086, now seen corresponding path program 1 times [2018-09-14 18:09:31,439 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:09:31,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:09:31,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:09:31,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:09:31,440 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:09:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:09:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-09-14 18:09:32,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:09:32,033 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 18:09:32,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:09:32,041 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:09:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:09:32,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:09:36,357 WARN L178 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-09-14 18:09:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-09-14 18:09:36,477 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:09:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 75 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:09:37,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:09:37,670 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 18:09:37,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:09:37,700 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:09:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:09:37,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:09:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-09-14 18:09:38,024 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:09:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 75 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:09:38,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:09:38,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 16 [2018-09-14 18:09:38,639 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:09:38,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-14 18:09:38,640 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-14 18:09:38,640 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2018-09-14 18:09:38,641 INFO L87 Difference]: Start difference. First operand 24202 states and 28480 transitions. Second operand 10 states. Received shutdown request... [2018-09-14 18:10:01,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-14 18:10:01,088 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 18:10:01,095 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 18:10:01,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 06:10:01 BoogieIcfgContainer [2018-09-14 18:10:01,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 18:10:01,096 INFO L168 Benchmark]: Toolchain (without parser) took 251982.75 ms. Allocated memory was 1.5 GB in the beginning and 3.1 GB in the end (delta: 1.6 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 226.1 MB. Max. memory is 7.1 GB. [2018-09-14 18:10:01,097 INFO L168 Benchmark]: CDTParser took 0.48 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 18:10:01,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1745.09 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: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. [2018-09-14 18:10:01,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 257.64 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-09-14 18:10:01,100 INFO L168 Benchmark]: Boogie Preprocessor took 938.70 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 922.7 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 123.5 MB. Max. memory is 7.1 GB. [2018-09-14 18:10:01,101 INFO L168 Benchmark]: RCFGBuilder took 13880.95 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.9 GB in the end (delta: 444.0 MB). Peak memory consumption was 444.0 MB. Max. memory is 7.1 GB. [2018-09-14 18:10:01,101 INFO L168 Benchmark]: TraceAbstraction took 235153.28 ms. Allocated memory was 2.4 GB in the beginning and 3.1 GB in the end (delta: 666.4 MB). Free memory was 1.9 GB in the beginning and 2.8 GB in the end (delta: -895.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 18:10:01,106 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 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 1745.09 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: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 257.64 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 938.70 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 922.7 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 123.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13880.95 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.9 GB in the end (delta: 444.0 MB). Peak memory consumption was 444.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235153.28 ms. Allocated memory was 2.4 GB in the beginning and 3.1 GB in the end (delta: 666.4 MB). Free memory was 1.9 GB in the beginning and 2.8 GB in the end (delta: -895.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 113]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 113). Cancelled while BasicCegarLoop was constructing difference of abstraction (24202states) and FLOYD_HOARE automaton (currently 12 states, 10 states before enhancement), while ReachableStatesComputation was computing reachable states (4156 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 235.0s OverallTime, 9 OverallIterations, 3 TraceHistogramMax, 159.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3229 SDtfs, 12000 SDslu, 2107 SDs, 0 SdLazy, 26739 SolverSat, 6604 SolverUnsat, 30 SolverUnknown, 0 SolverNotchecked, 148.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3634 GetRequests, 3534 SyntacticMatches, 22 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 65.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24202occurred 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: 2.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 3327 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 70.9s InterpolantComputationTime, 3446 NumberOfCodeBlocks, 3446 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 5202 ConstructedInterpolants, 302 QuantifiedInterpolants, 7433604 SizeOfPredicates, 14 NumberOfNonLiveVariables, 3291 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 25 InterpolantComputations, 8 PerfectInterpolantSequences, 2625/3065 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_label44_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_18-10-01-121.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label44_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_18-10-01-121.csv Completed graceful shutdown