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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label01_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:11:55,234 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:11:55,236 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:11:55,247 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:11:55,248 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:11:55,249 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:11:55,250 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:11:55,252 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:11:55,253 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:11:55,254 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:11:55,255 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:11:55,255 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:11:55,256 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:11:55,258 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:11:55,259 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:11:55,260 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:11:55,260 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:11:55,262 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:11:55,264 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:11:55,266 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:11:55,267 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:11:55,268 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:11:55,270 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:11:55,271 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:11:55,271 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:11:55,272 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:11:55,273 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:11:55,274 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:11:55,275 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:11:55,276 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:11:55,276 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:11:55,277 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:11:55,277 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:11:55,278 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:11:55,279 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:11:55,279 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:11:55,280 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 18:11:55,295 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:11:55,295 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:11:55,296 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:11:55,296 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:11:55,296 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:11:55,297 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:11:55,297 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:11:55,297 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:11:55,297 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:11:55,297 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:11:55,298 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:11:55,298 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:11:55,298 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:11:55,299 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:11:55,299 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:11:55,299 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:11:55,299 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:11:55,299 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:11:55,300 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:11:55,300 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:11:55,300 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:11:55,300 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:11:55,300 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:11:55,301 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:11:55,301 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:11:55,301 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:11:55,301 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:11:55,301 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:11:55,302 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:11:55,302 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:11:55,302 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:11:55,302 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:11:55,302 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:11:55,302 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:11:55,303 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:11:55,345 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:11:55,358 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:11:55,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:11:55,363 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:11:55,363 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:11:55,364 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label01_false-unreach-call.c [2018-11-07 18:11:55,421 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d596215c5/500451a3e0574e5eaf71570158efb6c5/FLAGe50a9444b [2018-11-07 18:11:56,139 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:11:56,139 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label01_false-unreach-call.c [2018-11-07 18:11:56,170 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d596215c5/500451a3e0574e5eaf71570158efb6c5/FLAGe50a9444b [2018-11-07 18:11:56,186 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d596215c5/500451a3e0574e5eaf71570158efb6c5 [2018-11-07 18:11:56,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:11:56,199 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:11:56,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:11:56,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:11:56,205 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:11:56,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:11:56" (1/1) ... [2018-11-07 18:11:56,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44e1a716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:56, skipping insertion in model container [2018-11-07 18:11:56,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:11:56" (1/1) ... [2018-11-07 18:11:56,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:11:56,298 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:11:57,108 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:11:57,112 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:11:57,366 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:11:57,386 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:11:57,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:57 WrapperNode [2018-11-07 18:11:57,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:11:57,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:11:57,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:11:57,389 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:11:57,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:57" (1/1) ... [2018-11-07 18:11:57,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:57" (1/1) ... [2018-11-07 18:11:57,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:11:57,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:11:57,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:11:57,595 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:11:57,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:57" (1/1) ... [2018-11-07 18:11:57,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:57" (1/1) ... [2018-11-07 18:11:57,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:57" (1/1) ... [2018-11-07 18:11:57,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:57" (1/1) ... [2018-11-07 18:11:57,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:57" (1/1) ... [2018-11-07 18:11:57,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:57" (1/1) ... [2018-11-07 18:11:57,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:57" (1/1) ... [2018-11-07 18:11:57,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:11:57,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:11:57,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:11:57,750 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:11:57,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:57" (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 [2018-11-07 18:11:57,829 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:11:57,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:11:57,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:11:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 18:11:57,830 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 18:11:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:11:57,830 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:11:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:11:57,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:11:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:11:57,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:12:03,631 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:12:03,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:12:03 BoogieIcfgContainer [2018-11-07 18:12:03,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:12:03,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:12:03,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:12:03,639 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:12:03,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:11:56" (1/3) ... [2018-11-07 18:12:03,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65104099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:12:03, skipping insertion in model container [2018-11-07 18:12:03,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:11:57" (2/3) ... [2018-11-07 18:12:03,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65104099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:12:03, skipping insertion in model container [2018-11-07 18:12:03,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:12:03" (3/3) ... [2018-11-07 18:12:03,645 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label01_false-unreach-call.c [2018-11-07 18:12:03,657 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:12:03,671 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:12:03,691 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:12:03,747 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:12:03,748 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:12:03,748 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:12:03,748 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:12:03,748 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:12:03,749 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:12:03,749 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:12:03,749 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:12:03,804 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-11-07 18:12:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-07 18:12:03,814 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:12:03,816 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:12:03,819 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:12:03,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:12:03,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1628611221, now seen corresponding path program 1 times [2018-11-07 18:12:03,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:12:03,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:03,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:12:03,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:03,890 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:12:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:12:04,261 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:12:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:12:04,390 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:12:04,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:12:04,394 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:12:04,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:12:04,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:12:04,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:12:04,443 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-11-07 18:12:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:12:07,824 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-11-07 18:12:07,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:12:07,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2018-11-07 18:12:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:12:07,852 INFO L225 Difference]: With dead ends: 1156 [2018-11-07 18:12:07,852 INFO L226 Difference]: Without dead ends: 744 [2018-11-07 18:12:07,862 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:12:07,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-11-07 18:12:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-11-07 18:12:07,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-11-07 18:12:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1317 transitions. [2018-11-07 18:12:07,974 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1317 transitions. Word has length 33 [2018-11-07 18:12:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:12:07,975 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1317 transitions. [2018-11-07 18:12:07,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:12:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1317 transitions. [2018-11-07 18:12:07,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-07 18:12:07,981 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:12:07,982 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:12:07,982 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:12:07,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:12:07,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1521195448, now seen corresponding path program 1 times [2018-11-07 18:12:07,983 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:12:07,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:07,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:12:07,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:07,985 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:12:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:12:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:12:08,427 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:12:08,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:12:08,428 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:12:08,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:12:08,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:12:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:12:08,431 INFO L87 Difference]: Start difference. First operand 744 states and 1317 transitions. Second operand 6 states. [2018-11-07 18:12:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:12:17,841 INFO L93 Difference]: Finished difference Result 2959 states and 5503 transitions. [2018-11-07 18:12:17,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 18:12:17,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2018-11-07 18:12:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:12:17,872 INFO L225 Difference]: With dead ends: 2959 [2018-11-07 18:12:17,872 INFO L226 Difference]: Without dead ends: 2221 [2018-11-07 18:12:17,887 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:12:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2018-11-07 18:12:18,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 2175. [2018-11-07 18:12:18,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2175 states. [2018-11-07 18:12:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 3686 transitions. [2018-11-07 18:12:18,043 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 3686 transitions. Word has length 109 [2018-11-07 18:12:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:12:18,043 INFO L480 AbstractCegarLoop]: Abstraction has 2175 states and 3686 transitions. [2018-11-07 18:12:18,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:12:18,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 3686 transitions. [2018-11-07 18:12:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-07 18:12:18,055 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:12:18,055 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:12:18,056 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:12:18,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:12:18,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1402365108, now seen corresponding path program 1 times [2018-11-07 18:12:18,056 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:12:18,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:18,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:12:18,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:18,059 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:12:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:12:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:12:18,322 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:12:18,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:12:18,322 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:12:18,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:12:18,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:12:18,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:12:18,324 INFO L87 Difference]: Start difference. First operand 2175 states and 3686 transitions. Second operand 6 states. [2018-11-07 18:12:23,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:12:23,069 INFO L93 Difference]: Finished difference Result 6467 states and 11204 transitions. [2018-11-07 18:12:23,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:12:23,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2018-11-07 18:12:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:12:23,098 INFO L225 Difference]: With dead ends: 6467 [2018-11-07 18:12:23,098 INFO L226 Difference]: Without dead ends: 4298 [2018-11-07 18:12:23,121 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:12:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2018-11-07 18:12:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4260. [2018-11-07 18:12:23,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4260 states. [2018-11-07 18:12:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4260 states to 4260 states and 6472 transitions. [2018-11-07 18:12:23,261 INFO L78 Accepts]: Start accepts. Automaton has 4260 states and 6472 transitions. Word has length 115 [2018-11-07 18:12:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:12:23,262 INFO L480 AbstractCegarLoop]: Abstraction has 4260 states and 6472 transitions. [2018-11-07 18:12:23,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:12:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4260 states and 6472 transitions. [2018-11-07 18:12:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-07 18:12:23,269 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:12:23,269 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:12:23,269 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:12:23,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:12:23,270 INFO L82 PathProgramCache]: Analyzing trace with hash -453027992, now seen corresponding path program 1 times [2018-11-07 18:12:23,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:12:23,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:23,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:12:23,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:12:23,271 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:12:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:12:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:12:23,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:12:23,667 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:12:23,668 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 126 with the following transitions: [2018-11-07 18:12:23,670 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [343], [345], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:12:23,715 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:12:23,716 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:12:24,396 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:12:25,015 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:12:25,016 INFO L272 AbstractInterpreter]: Visited 99 different actions 284 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:12:25,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:12:25,064 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:12:25,645 INFO L227 lantSequenceWeakener]: Weakened 5 states. On average, predicates are now at 81.82% of their original sizes. [2018-11-07 18:12:25,645 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:12:26,859 INFO L415 sIntCurrentIteration]: We unified 124 AI predicates to 124 [2018-11-07 18:12:26,859 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:12:26,860 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:12:26,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [7] total 21 [2018-11-07 18:12:26,860 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:12:26,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 18:12:26,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 18:12:26,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:12:26,861 INFO L87 Difference]: Start difference. First operand 4260 states and 6472 transitions. Second operand 16 states. [2018-11-07 18:13:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:13:10,056 INFO L93 Difference]: Finished difference Result 10948 states and 17071 transitions. [2018-11-07 18:13:10,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:13:10,057 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 125 [2018-11-07 18:13:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:13:10,088 INFO L225 Difference]: With dead ends: 10948 [2018-11-07 18:13:10,088 INFO L226 Difference]: Without dead ends: 6694 [2018-11-07 18:13:10,109 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-11-07 18:13:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6694 states. [2018-11-07 18:13:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6694 to 6690. [2018-11-07 18:13:10,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6690 states. [2018-11-07 18:13:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6690 states to 6690 states and 9031 transitions. [2018-11-07 18:13:10,287 INFO L78 Accepts]: Start accepts. Automaton has 6690 states and 9031 transitions. Word has length 125 [2018-11-07 18:13:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:13:10,287 INFO L480 AbstractCegarLoop]: Abstraction has 6690 states and 9031 transitions. [2018-11-07 18:13:10,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 18:13:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 6690 states and 9031 transitions. [2018-11-07 18:13:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-07 18:13:10,291 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:13:10,291 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:13:10,292 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:13:10,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:13:10,292 INFO L82 PathProgramCache]: Analyzing trace with hash -173838551, now seen corresponding path program 1 times [2018-11-07 18:13:10,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:13:10,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:13:10,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:13:10,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:13:10,294 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:13:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:13:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:13:10,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:13:10,791 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:13:10,791 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 187 with the following transitions: [2018-11-07 18:13:10,792 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [343], [345], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1004], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:13:10,799 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:13:10,799 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:13:10,976 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:13:11,285 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:13:11,285 INFO L272 AbstractInterpreter]: Visited 160 different actions 467 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:13:11,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:13:11,296 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:13:11,686 INFO L227 lantSequenceWeakener]: Weakened 23 states. On average, predicates are now at 81.38% of their original sizes. [2018-11-07 18:13:11,686 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:13:12,061 INFO L415 sIntCurrentIteration]: We unified 185 AI predicates to 185 [2018-11-07 18:13:12,061 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:13:12,062 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:13:12,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [7] total 20 [2018-11-07 18:13:12,062 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:13:12,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 18:13:12,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 18:13:12,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:13:12,064 INFO L87 Difference]: Start difference. First operand 6690 states and 9031 transitions. Second operand 15 states. [2018-11-07 18:13:38,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:13:38,825 INFO L93 Difference]: Finished difference Result 14461 states and 21016 transitions. [2018-11-07 18:13:38,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-07 18:13:38,825 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 186 [2018-11-07 18:13:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:13:38,867 INFO L225 Difference]: With dead ends: 14461 [2018-11-07 18:13:38,867 INFO L226 Difference]: Without dead ends: 9179 [2018-11-07 18:13:38,896 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 191 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:13:38,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9179 states. [2018-11-07 18:13:39,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9179 to 9157. [2018-11-07 18:13:39,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9157 states. [2018-11-07 18:13:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 11701 transitions. [2018-11-07 18:13:39,142 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 11701 transitions. Word has length 186 [2018-11-07 18:13:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:13:39,143 INFO L480 AbstractCegarLoop]: Abstraction has 9157 states and 11701 transitions. [2018-11-07 18:13:39,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 18:13:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 11701 transitions. [2018-11-07 18:13:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-11-07 18:13:39,149 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:13:39,150 INFO L375 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:13:39,150 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:13:39,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:13:39,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2124999389, now seen corresponding path program 1 times [2018-11-07 18:13:39,151 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:13:39,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:13:39,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:13:39,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:13:39,152 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:13:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:13:39,448 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:13:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 18:13:39,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:13:39,840 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:13:39,840 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 246 with the following transitions: [2018-11-07 18:13:39,840 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [343], [345], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [728], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [904], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:13:39,845 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:13:39,845 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:13:39,964 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:13:40,325 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:13:40,325 INFO L272 AbstractInterpreter]: Visited 136 different actions 395 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:13:40,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:13:40,366 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:13:40,813 INFO L227 lantSequenceWeakener]: Weakened 27 states. On average, predicates are now at 78.11% of their original sizes. [2018-11-07 18:13:40,813 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:13:41,216 INFO L415 sIntCurrentIteration]: We unified 244 AI predicates to 244 [2018-11-07 18:13:41,217 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:13:41,217 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:13:41,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [6] total 22 [2018-11-07 18:13:41,217 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:13:41,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:13:41,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:13:41,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:13:41,219 INFO L87 Difference]: Start difference. First operand 9157 states and 11701 transitions. Second operand 18 states. [2018-11-07 18:14:19,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:14:19,155 INFO L93 Difference]: Finished difference Result 18115 states and 24509 transitions. [2018-11-07 18:14:19,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-07 18:14:19,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 245 [2018-11-07 18:14:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:14:19,202 INFO L225 Difference]: With dead ends: 18115 [2018-11-07 18:14:19,203 INFO L226 Difference]: Without dead ends: 10368 [2018-11-07 18:14:19,225 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 253 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2018-11-07 18:14:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10368 states. [2018-11-07 18:14:19,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10368 to 10132. [2018-11-07 18:14:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10132 states. [2018-11-07 18:14:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10132 states to 10132 states and 12746 transitions. [2018-11-07 18:14:19,462 INFO L78 Accepts]: Start accepts. Automaton has 10132 states and 12746 transitions. Word has length 245 [2018-11-07 18:14:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:14:19,463 INFO L480 AbstractCegarLoop]: Abstraction has 10132 states and 12746 transitions. [2018-11-07 18:14:19,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:14:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 10132 states and 12746 transitions. [2018-11-07 18:14:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-11-07 18:14:19,483 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:14:19,483 INFO L375 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:14:19,484 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:14:19,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:14:19,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1489533312, now seen corresponding path program 1 times [2018-11-07 18:14:19,484 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:14:19,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:14:19,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:14:19,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:14:19,486 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:14:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:14:20,086 WARN L179 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-11-07 18:14:20,298 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 18:14:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 157 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:14:20,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:14:20,737 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:14:20,738 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 393 with the following transitions: [2018-11-07 18:14:20,738 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [343], [345], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [868], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:14:20,745 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:14:20,745 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:14:21,654 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:14:21,654 INFO L272 AbstractInterpreter]: Visited 248 different actions 492 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:14:21,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:14:21,661 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:14:22,073 INFO L227 lantSequenceWeakener]: Weakened 162 states. On average, predicates are now at 78% of their original sizes. [2018-11-07 18:14:22,073 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:14:22,810 INFO L415 sIntCurrentIteration]: We unified 391 AI predicates to 391 [2018-11-07 18:14:22,810 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:14:22,811 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:14:22,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [8] total 25 [2018-11-07 18:14:22,811 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:14:22,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-07 18:14:22,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-07 18:14:22,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:14:22,813 INFO L87 Difference]: Start difference. First operand 10132 states and 12746 transitions. Second operand 19 states. [2018-11-07 18:14:24,776 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:14:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:14:44,013 INFO L93 Difference]: Finished difference Result 18159 states and 23643 transitions. [2018-11-07 18:14:44,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-07 18:14:44,013 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 392 [2018-11-07 18:14:44,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:14:44,049 INFO L225 Difference]: With dead ends: 18159 [2018-11-07 18:14:44,049 INFO L226 Difference]: Without dead ends: 10768 [2018-11-07 18:14:44,067 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 409 GetRequests, 353 SyntacticMatches, 21 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=249, Invalid=1083, Unknown=0, NotChecked=0, Total=1332 [2018-11-07 18:14:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10768 states. [2018-11-07 18:14:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10768 to 10763. [2018-11-07 18:14:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10763 states. [2018-11-07 18:14:44,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10763 states to 10763 states and 13417 transitions. [2018-11-07 18:14:44,298 INFO L78 Accepts]: Start accepts. Automaton has 10763 states and 13417 transitions. Word has length 392 [2018-11-07 18:14:44,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:14:44,299 INFO L480 AbstractCegarLoop]: Abstraction has 10763 states and 13417 transitions. [2018-11-07 18:14:44,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-07 18:14:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 10763 states and 13417 transitions. [2018-11-07 18:14:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-11-07 18:14:44,316 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:14:44,316 INFO L375 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:14:44,317 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:14:44,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:14:44,317 INFO L82 PathProgramCache]: Analyzing trace with hash 384337861, now seen corresponding path program 1 times [2018-11-07 18:14:44,317 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:14:44,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:14:44,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:14:44,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:14:44,318 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:14:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:14:44,688 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:14:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 18:14:45,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:14:45,257 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:14:45,258 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 394 with the following transitions: [2018-11-07 18:14:45,258 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [343], [345], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [840], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:14:45,265 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:14:45,265 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:14:48,333 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:14:48,333 INFO L272 AbstractInterpreter]: Visited 256 different actions 2506 times. Merged at 5 different actions 45 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:14:48,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:14:48,340 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:14:48,852 INFO L227 lantSequenceWeakener]: Weakened 40 states. On average, predicates are now at 79.89% of their original sizes. [2018-11-07 18:14:48,853 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:14:49,215 INFO L415 sIntCurrentIteration]: We unified 392 AI predicates to 392 [2018-11-07 18:14:49,215 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:14:49,215 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:14:49,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-07 18:14:49,216 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:14:49,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 18:14:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 18:14:49,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-07 18:14:49,218 INFO L87 Difference]: Start difference. First operand 10763 states and 13417 transitions. Second operand 22 states. [2018-11-07 18:14:51,162 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:15:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:15:15,794 INFO L93 Difference]: Finished difference Result 18795 states and 24469 transitions. [2018-11-07 18:15:15,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-07 18:15:15,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 393 [2018-11-07 18:15:15,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:15:15,828 INFO L225 Difference]: With dead ends: 18795 [2018-11-07 18:15:15,828 INFO L226 Difference]: Without dead ends: 11404 [2018-11-07 18:15:15,847 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 403 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2018-11-07 18:15:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2018-11-07 18:15:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11396. [2018-11-07 18:15:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11396 states. [2018-11-07 18:15:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11396 states to 11396 states and 14110 transitions. [2018-11-07 18:15:16,877 INFO L78 Accepts]: Start accepts. Automaton has 11396 states and 14110 transitions. Word has length 393 [2018-11-07 18:15:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:15:16,878 INFO L480 AbstractCegarLoop]: Abstraction has 11396 states and 14110 transitions. [2018-11-07 18:15:16,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 18:15:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 11396 states and 14110 transitions. [2018-11-07 18:15:16,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2018-11-07 18:15:16,901 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:15:16,901 INFO L375 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:15:16,902 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:15:16,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:15:16,902 INFO L82 PathProgramCache]: Analyzing trace with hash -258191547, now seen corresponding path program 1 times [2018-11-07 18:15:16,902 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:15:16,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:15:16,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:15:16,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:15:16,904 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:15:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:15:17,729 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2018-11-07 18:15:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-07 18:15:18,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:15:18,216 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:15:18,216 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 458 with the following transitions: [2018-11-07 18:15:18,216 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [343], [345], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1128], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:15:18,220 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:15:18,221 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:15:18,473 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:15:18,730 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:15:18,730 INFO L272 AbstractInterpreter]: Visited 249 different actions 744 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:15:18,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:15:18,740 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:15:18,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:15:18,740 INFO L194 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 [2018-11-07 18:15:18,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:15:18,750 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:15:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:15:18,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:15:19,964 WARN L179 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2018-11-07 18:15:20,316 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 19 [2018-11-07 18:15:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-07 18:15:20,647 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:15:20,899 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 23 [2018-11-07 18:15:21,242 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2018-11-07 18:15:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-07 18:15:24,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:15:24,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2018-11-07 18:15:24,241 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:15:24,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:15:24,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:15:24,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-07 18:15:24,243 INFO L87 Difference]: Start difference. First operand 11396 states and 14110 transitions. Second operand 9 states. Received shutdown request... [2018-11-07 18:15:37,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-07 18:15:37,415 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:15:37,420 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:15:37,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:15:37 BoogieIcfgContainer [2018-11-07 18:15:37,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:15:37,422 INFO L168 Benchmark]: Toolchain (without parser) took 221224.23 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 615.1 MB in the end (delta: 779.4 MB). Peak memory consumption was 3.9 GB. Max. memory is 7.1 GB. [2018-11-07 18:15:37,423 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:15:37,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1187.31 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-07 18:15:37,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 205.78 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 720.9 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -838.8 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2018-11-07 18:15:37,425 INFO L168 Benchmark]: Boogie Preprocessor took 155.12 ms. Allocated memory is still 2.2 GB. Free memory is still 2.1 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:15:37,426 INFO L168 Benchmark]: RCFGBuilder took 5882.68 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 259.6 MB). Peak memory consumption was 259.6 MB. Max. memory is 7.1 GB. [2018-11-07 18:15:37,427 INFO L168 Benchmark]: TraceAbstraction took 213787.62 ms. Allocated memory was 2.2 GB in the beginning and 4.6 GB in the end (delta: 2.4 GB). Free memory was 1.9 GB in the beginning and 615.1 MB in the end (delta: 1.3 GB). Peak memory consumption was 3.7 GB. Max. memory is 7.1 GB. [2018-11-07 18:15:37,436 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1187.31 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 205.78 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 720.9 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -838.8 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 155.12 ms. Allocated memory is still 2.2 GB. Free memory is still 2.1 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5882.68 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 259.6 MB). Peak memory consumption was 259.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 213787.62 ms. Allocated memory was 2.2 GB in the beginning and 4.6 GB in the end (delta: 2.4 GB). Free memory was 1.9 GB in the beginning and 615.1 MB in the end (delta: 1.3 GB). Peak memory consumption was 3.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 85). Cancelled while BasicCegarLoop was constructing difference of abstraction (11396states) and FLOYD_HOARE automaton (currently 16 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (15330 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 213.6s OverallTime, 9 OverallIterations, 3 TraceHistogramMax, 186.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2545 SDtfs, 25197 SDslu, 1913 SDs, 0 SdLazy, 34795 SolverSat, 5225 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 79.3s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 2347 GetRequests, 2146 SyntacticMatches, 34 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11396occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 6.9s AbstIntTime, 6 AbstIntIterations, 5 AbstIntStrong, 0.997663939484104 AbsIntWeakeningRatio, 0.08832335329341318 AbsIntAvgWeakeningVarsNumRemoved, 11.239520958083832 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 359 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 10.2s InterpolantComputationTime, 2512 NumberOfCodeBlocks, 2512 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 2958 ConstructedInterpolants, 27 QuantifiedInterpolants, 17759627 SizeOfPredicates, 3 NumberOfNonLiveVariables, 642 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 994/1283 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown