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_label39_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:54:44,307 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:54:44,309 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:54:44,326 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:54:44,326 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:54:44,328 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:54:44,329 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:54:44,331 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:54:44,333 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:54:44,335 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:54:44,336 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:54:44,336 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:54:44,338 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:54:44,339 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:54:44,342 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:54:44,349 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:54:44,349 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:54:44,351 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:54:44,353 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:54:44,355 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:54:44,356 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:54:44,357 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:54:44,358 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:54:44,361 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:54:44,361 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:54:44,362 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:54:44,363 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:54:44,364 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:54:44,365 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:54:44,366 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:54:44,366 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:54:44,367 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 20:54:44,368 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 20:54:44,368 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 20:54:44,370 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 20:54:44,371 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 20:54:44,371 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 20:54:44,403 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:54:44,403 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:54:44,404 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:54:44,404 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:54:44,404 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:54:44,404 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:54:44,404 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:54:44,404 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:54:44,405 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:54:44,405 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:54:44,405 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:54:44,405 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:54:44,405 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:54:44,406 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:54:44,406 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:54:44,406 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:54:44,407 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:54:44,407 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:54:44,407 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:54:44,407 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:54:44,407 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:54:44,407 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:54:44,410 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:54:44,410 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:54:44,410 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:54:44,410 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:54:44,411 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:54:44,411 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:54:44,411 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:54:44,411 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:54:44,411 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:54:44,412 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:54:44,412 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:54:44,412 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:54:44,412 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:54:44,464 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:54:44,479 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:54:44,483 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:54:44,485 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:54:44,485 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:54:44,486 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label39_true-unreach-call.c [2018-11-07 20:54:44,554 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d44f713e/d2f8cc2f0a264038b5bbabf5dad8fc02/FLAGf73b3996b [2018-11-07 20:54:45,231 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:54:45,234 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label39_true-unreach-call.c [2018-11-07 20:54:45,264 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d44f713e/d2f8cc2f0a264038b5bbabf5dad8fc02/FLAGf73b3996b [2018-11-07 20:54:45,284 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d44f713e/d2f8cc2f0a264038b5bbabf5dad8fc02 [2018-11-07 20:54:45,296 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:54:45,298 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:54:45,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:54:45,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:54:45,303 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:54:45,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:54:45" (1/1) ... [2018-11-07 20:54:45,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c7aa46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:45, skipping insertion in model container [2018-11-07 20:54:45,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:54:45" (1/1) ... [2018-11-07 20:54:45,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:54:45,427 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:54:46,192 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:54:46,198 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:54:46,464 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:54:46,484 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:54:46,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:46 WrapperNode [2018-11-07 20:54:46,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:54:46,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:54:46,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:54:46,487 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:54:46,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:46" (1/1) ... [2018-11-07 20:54:46,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:46" (1/1) ... [2018-11-07 20:54:46,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:54:46,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:54:46,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:54:46,694 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:54:46,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:46" (1/1) ... [2018-11-07 20:54:46,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:46" (1/1) ... [2018-11-07 20:54:46,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:46" (1/1) ... [2018-11-07 20:54:46,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:46" (1/1) ... [2018-11-07 20:54:46,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:46" (1/1) ... [2018-11-07 20:54:46,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:46" (1/1) ... [2018-11-07 20:54:46,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:46" (1/1) ... [2018-11-07 20:54:46,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:54:46,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:54:46,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:54:46,870 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:54:46,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:46" (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 20:54:46,948 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:54:46,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:54:46,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:54:46,948 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 20:54:46,949 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 20:54:46,949 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:54:46,949 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:54:46,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:54:46,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:54:46,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:54:46,951 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:54:52,932 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:54:52,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:54:52 BoogieIcfgContainer [2018-11-07 20:54:52,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:54:52,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:54:52,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:54:52,940 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:54:52,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:54:45" (1/3) ... [2018-11-07 20:54:52,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad1ce39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:54:52, skipping insertion in model container [2018-11-07 20:54:52,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:54:46" (2/3) ... [2018-11-07 20:54:52,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad1ce39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:54:52, skipping insertion in model container [2018-11-07 20:54:52,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:54:52" (3/3) ... [2018-11-07 20:54:52,944 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label39_true-unreach-call.c [2018-11-07 20:54:52,955 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:54:52,965 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:54:52,985 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:54:53,033 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:54:53,034 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:54:53,034 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:54:53,034 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:54:53,034 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:54:53,035 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:54:53,035 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:54:53,035 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:54:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-11-07 20:54:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-07 20:54:53,099 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:54:53,100 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, 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 20:54:53,104 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:54:53,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:54:53,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1251899380, now seen corresponding path program 1 times [2018-11-07 20:54:53,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:54:53,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:54:53,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:54:53,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:54:53,178 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:54:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:54:53,621 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-11-07 20:54:53,638 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 20:54:53,640 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:54:53,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:54:53,641 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:54:53,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:54:53,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:54:53,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:54:53,667 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 4 states. [2018-11-07 20:54:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:54:58,708 INFO L93 Difference]: Finished difference Result 1513 states and 2838 transitions. [2018-11-07 20:54:58,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:54:58,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-11-07 20:54:58,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:54:58,751 INFO L225 Difference]: With dead ends: 1513 [2018-11-07 20:54:58,752 INFO L226 Difference]: Without dead ends: 1097 [2018-11-07 20:54:58,765 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:54:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-11-07 20:54:58,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 744. [2018-11-07 20:54:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-11-07 20:54:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1357 transitions. [2018-11-07 20:54:58,889 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1357 transitions. Word has length 56 [2018-11-07 20:54:58,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:54:58,890 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1357 transitions. [2018-11-07 20:54:58,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:54:58,890 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1357 transitions. [2018-11-07 20:54:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-07 20:54:58,898 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:54:58,899 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, 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] [2018-11-07 20:54:58,899 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:54:58,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:54:58,900 INFO L82 PathProgramCache]: Analyzing trace with hash -594797350, now seen corresponding path program 1 times [2018-11-07 20:54:58,900 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:54:58,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:54:58,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:54:58,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:54:58,901 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:54:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:54:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:54:59,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:54:59,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 20:54:59,159 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:54:59,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 20:54:59,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 20:54:59,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 20:54:59,162 INFO L87 Difference]: Start difference. First operand 744 states and 1357 transitions. Second operand 5 states. [2018-11-07 20:55:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:55:04,158 INFO L93 Difference]: Finished difference Result 2196 states and 4092 transitions. [2018-11-07 20:55:04,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:55:04,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2018-11-07 20:55:04,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:55:04,182 INFO L225 Difference]: With dead ends: 2196 [2018-11-07 20:55:04,182 INFO L226 Difference]: Without dead ends: 1458 [2018-11-07 20:55:04,186 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:55:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2018-11-07 20:55:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1438. [2018-11-07 20:55:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2018-11-07 20:55:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2551 transitions. [2018-11-07 20:55:04,278 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2551 transitions. Word has length 126 [2018-11-07 20:55:04,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:55:04,279 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 2551 transitions. [2018-11-07 20:55:04,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 20:55:04,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2551 transitions. [2018-11-07 20:55:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-07 20:55:04,292 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:55:04,292 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, 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] [2018-11-07 20:55:04,293 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:55:04,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:55:04,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1843387759, now seen corresponding path program 1 times [2018-11-07 20:55:04,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:55:04,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:04,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:55:04,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:04,295 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:55:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:55:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:55:04,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:55:04,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:55:04,536 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:55:04,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:55:04,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:55:04,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:55:04,537 INFO L87 Difference]: Start difference. First operand 1438 states and 2551 transitions. Second operand 6 states. [2018-11-07 20:55:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:55:09,419 INFO L93 Difference]: Finished difference Result 4237 states and 7540 transitions. [2018-11-07 20:55:09,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:55:09,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2018-11-07 20:55:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:55:09,438 INFO L225 Difference]: With dead ends: 4237 [2018-11-07 20:55:09,438 INFO L226 Difference]: Without dead ends: 2805 [2018-11-07 20:55:09,448 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 20:55:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2018-11-07 20:55:09,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2785. [2018-11-07 20:55:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2785 states. [2018-11-07 20:55:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 4352 transitions. [2018-11-07 20:55:09,535 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 4352 transitions. Word has length 129 [2018-11-07 20:55:09,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:55:09,536 INFO L480 AbstractCegarLoop]: Abstraction has 2785 states and 4352 transitions. [2018-11-07 20:55:09,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:55:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 4352 transitions. [2018-11-07 20:55:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-11-07 20:55:09,543 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:55:09,543 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, 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, 1, 1, 1, 1, 1, 1, 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 20:55:09,544 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:55:09,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:55:09,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1559994924, now seen corresponding path program 1 times [2018-11-07 20:55:09,544 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:55:09,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:09,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:55:09,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:09,546 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:55:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:55:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 98 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:55:09,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:55:09,807 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:55:09,809 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 223 with the following transitions: [2018-11-07 20:55:09,810 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], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [684], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [764], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:55:09,859 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:55:09,860 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:55:10,596 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:55:10,598 INFO L272 AbstractInterpreter]: Visited 98 different actions 98 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 20:55:10,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:55:10,641 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:55:11,327 INFO L227 lantSequenceWeakener]: Weakened 200 states. On average, predicates are now at 78.26% of their original sizes. [2018-11-07 20:55:11,327 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:55:11,629 INFO L415 sIntCurrentIteration]: We unified 221 AI predicates to 221 [2018-11-07 20:55:11,629 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:55:11,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:55:11,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-07 20:55:11,631 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:55:11,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:55:11,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:55:11,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:55:11,633 INFO L87 Difference]: Start difference. First operand 2785 states and 4352 transitions. Second operand 10 states. [2018-11-07 20:55:16,503 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:55:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:55:39,464 INFO L93 Difference]: Finished difference Result 5907 states and 9243 transitions. [2018-11-07 20:55:39,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 20:55:39,464 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 222 [2018-11-07 20:55:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:55:39,480 INFO L225 Difference]: With dead ends: 5907 [2018-11-07 20:55:39,480 INFO L226 Difference]: Without dead ends: 3128 [2018-11-07 20:55:39,491 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 225 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-07 20:55:39,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states. [2018-11-07 20:55:39,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3128 to 3123. [2018-11-07 20:55:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3123 states. [2018-11-07 20:55:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 4698 transitions. [2018-11-07 20:55:39,572 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 4698 transitions. Word has length 222 [2018-11-07 20:55:39,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:55:39,573 INFO L480 AbstractCegarLoop]: Abstraction has 3123 states and 4698 transitions. [2018-11-07 20:55:39,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:55:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 4698 transitions. [2018-11-07 20:55:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-11-07 20:55:39,580 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:55:39,580 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:55:39,581 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:55:39,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:55:39,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1909742357, now seen corresponding path program 1 times [2018-11-07 20:55:39,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:55:39,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:39,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:55:39,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:39,583 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:55:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:55:39,852 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 20:55:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 99 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 20:55:40,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:55:40,313 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:55:40,313 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 266 with the following transitions: [2018-11-07 20:55:40,314 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], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [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], [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], [860], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:55:40,320 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:55:40,320 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:55:40,417 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:55:40,675 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:55:40,675 INFO L272 AbstractInterpreter]: Visited 126 different actions 364 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 20:55:40,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:55:40,713 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:55:40,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:55:40,713 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 20:55:40,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:55:40,723 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:55:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:55:40,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:55:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:55:41,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:55:41,430 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-07 20:55:41,538 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-07 20:55:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:55:42,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:55:42,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 20:55:42,071 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:55:42,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 20:55:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 20:55:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-07 20:55:42,072 INFO L87 Difference]: Start difference. First operand 3123 states and 4698 transitions. Second operand 9 states. [2018-11-07 20:55:51,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:55:51,596 INFO L93 Difference]: Finished difference Result 12271 states and 19563 transitions. [2018-11-07 20:55:51,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-07 20:55:51,600 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 265 [2018-11-07 20:55:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:55:51,653 INFO L225 Difference]: With dead ends: 12271 [2018-11-07 20:55:51,653 INFO L226 Difference]: Without dead ends: 9492 [2018-11-07 20:55:51,682 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 535 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2018-11-07 20:55:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9492 states. [2018-11-07 20:55:51,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9492 to 8974. [2018-11-07 20:55:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8974 states. [2018-11-07 20:55:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 11515 transitions. [2018-11-07 20:55:51,940 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 11515 transitions. Word has length 265 [2018-11-07 20:55:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:55:51,941 INFO L480 AbstractCegarLoop]: Abstraction has 8974 states and 11515 transitions. [2018-11-07 20:55:51,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 20:55:51,941 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 11515 transitions. [2018-11-07 20:55:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2018-11-07 20:55:51,988 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:55:51,988 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 20:55:51,992 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:55:51,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:55:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1333575078, now seen corresponding path program 1 times [2018-11-07 20:55:51,993 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:55:51,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:51,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:55:51,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:51,994 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:55:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:55:52,409 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 20:55:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 327 proven. 388 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-11-07 20:55:52,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:55:52,759 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:55:52,759 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 613 with the following transitions: [2018-11-07 20:55:52,760 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], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [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], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [856], [857], [860], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:55:52,766 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:55:52,766 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:55:52,872 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:55:53,540 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:55:53,541 INFO L272 AbstractInterpreter]: Visited 142 different actions 412 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 20:55:53,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:55:53,578 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:55:53,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:55:53,579 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 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 [2018-11-07 20:55:53,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:55:53,595 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:55:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:55:53,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:55:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 764 proven. 2 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2018-11-07 20:55:54,902 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:55:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 350 proven. 296 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2018-11-07 20:55:55,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:55:55,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2018-11-07 20:55:55,876 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:55:55,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:55:55,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:55:55,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-11-07 20:55:55,878 INFO L87 Difference]: Start difference. First operand 8974 states and 11515 transitions. Second operand 10 states. [2018-11-07 20:55:56,665 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 20:55:59,318 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-11-07 20:56:03,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:56:03,383 INFO L93 Difference]: Finished difference Result 23091 states and 29842 transitions. [2018-11-07 20:56:03,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:56:03,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 612 [2018-11-07 20:56:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:56:03,430 INFO L225 Difference]: With dead ends: 23091 [2018-11-07 20:56:03,430 INFO L226 Difference]: Without dead ends: 11609 [2018-11-07 20:56:03,504 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1257 GetRequests, 1232 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-11-07 20:56:03,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11609 states. [2018-11-07 20:56:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11609 to 11524. [2018-11-07 20:56:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11524 states. [2018-11-07 20:56:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11524 states to 11524 states and 12592 transitions. [2018-11-07 20:56:03,767 INFO L78 Accepts]: Start accepts. Automaton has 11524 states and 12592 transitions. Word has length 612 [2018-11-07 20:56:03,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:56:03,768 INFO L480 AbstractCegarLoop]: Abstraction has 11524 states and 12592 transitions. [2018-11-07 20:56:03,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:56:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 11524 states and 12592 transitions. [2018-11-07 20:56:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 943 [2018-11-07 20:56:03,829 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:56:03,830 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2018-11-07 20:56:03,830 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:56:03,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:56:03,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1100934256, now seen corresponding path program 1 times [2018-11-07 20:56:03,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:56:03,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:56:03,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:56:03,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:56:03,832 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:56:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:56:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 557 proven. 293 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2018-11-07 20:56:05,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:56:05,680 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:56:05,681 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 943 with the following transitions: [2018-11-07 20:56:05,681 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], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [684], [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], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [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], [1256], [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 20:56:05,687 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:56:05,688 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:56:06,177 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:56:06,177 INFO L272 AbstractInterpreter]: Visited 252 different actions 498 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:56:06,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:56:06,217 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:56:07,558 INFO L227 lantSequenceWeakener]: Weakened 386 states. On average, predicates are now at 77.9% of their original sizes. [2018-11-07 20:56:07,558 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:56:10,658 INFO L415 sIntCurrentIteration]: We unified 941 AI predicates to 941 [2018-11-07 20:56:10,658 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:56:10,659 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:56:10,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [6] total 25 [2018-11-07 20:56:10,659 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:56:10,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 20:56:10,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 20:56:10,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:56:10,661 INFO L87 Difference]: Start difference. First operand 11524 states and 12592 transitions. Second operand 21 states. [2018-11-07 20:56:21,501 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:56:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:56:32,279 INFO L93 Difference]: Finished difference Result 23344 states and 25524 transitions. [2018-11-07 20:56:32,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 20:56:32,279 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 942 [2018-11-07 20:56:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:56:32,314 INFO L225 Difference]: With dead ends: 23344 [2018-11-07 20:56:32,315 INFO L226 Difference]: Without dead ends: 12164 [2018-11-07 20:56:32,343 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 955 GetRequests, 806 SyntacticMatches, 116 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2018-11-07 20:56:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12164 states. [2018-11-07 20:56:32,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12164 to 12155. [2018-11-07 20:56:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12155 states. [2018-11-07 20:56:32,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12155 states to 12155 states and 13238 transitions. [2018-11-07 20:56:32,558 INFO L78 Accepts]: Start accepts. Automaton has 12155 states and 13238 transitions. Word has length 942 [2018-11-07 20:56:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:56:32,559 INFO L480 AbstractCegarLoop]: Abstraction has 12155 states and 13238 transitions. [2018-11-07 20:56:32,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 20:56:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 12155 states and 13238 transitions. [2018-11-07 20:56:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1052 [2018-11-07 20:56:32,628 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:56:32,629 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2018-11-07 20:56:32,630 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:56:32,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:56:32,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2131381335, now seen corresponding path program 1 times [2018-11-07 20:56:32,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:56:32,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:56:32,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:56:32,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:56:32,632 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:56:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:56:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2554 backedges. 617 proven. 872 refuted. 0 times theorem prover too weak. 1065 trivial. 0 not checked. [2018-11-07 20:56:35,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:56:35,172 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:56:35,172 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1052 with the following transitions: [2018-11-07 20:56:35,173 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], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [684], [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], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [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], [1256], [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 20:56:35,178 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:56:35,178 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:56:35,235 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:56:38,290 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:56:38,290 INFO L272 AbstractInterpreter]: Visited 261 different actions 3365 times. Merged at 8 different actions 104 times. Widened at 1 different actions 8 times. Found 21 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 20:56:38,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:56:38,299 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:56:39,618 INFO L227 lantSequenceWeakener]: Weakened 1048 states. On average, predicates are now at 77.5% of their original sizes. [2018-11-07 20:56:39,618 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:56:39,754 INFO L415 sIntCurrentIteration]: We unified 1050 AI predicates to 1050 [2018-11-07 20:56:39,754 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:56:39,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:56:39,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2018-11-07 20:56:39,755 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:56:39,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:56:39,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:56:39,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:56:39,757 INFO L87 Difference]: Start difference. First operand 12155 states and 13238 transitions. Second operand 10 states. [2018-11-07 20:56:52,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:56:52,194 INFO L93 Difference]: Finished difference Result 22700 states and 24878 transitions. [2018-11-07 20:56:52,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:56:52,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1051 [2018-11-07 20:56:52,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:56:52,230 INFO L225 Difference]: With dead ends: 22700 [2018-11-07 20:56:52,230 INFO L226 Difference]: Without dead ends: 12889 [2018-11-07 20:56:52,255 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 1058 GetRequests, 1042 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 20:56:52,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12889 states. [2018-11-07 20:56:52,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12889 to 12856. [2018-11-07 20:56:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12856 states. [2018-11-07 20:56:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12856 states to 12856 states and 13982 transitions. [2018-11-07 20:56:52,497 INFO L78 Accepts]: Start accepts. Automaton has 12856 states and 13982 transitions. Word has length 1051 [2018-11-07 20:56:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:56:52,499 INFO L480 AbstractCegarLoop]: Abstraction has 12856 states and 13982 transitions. [2018-11-07 20:56:52,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:56:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 12856 states and 13982 transitions. [2018-11-07 20:56:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1081 [2018-11-07 20:56:52,536 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:56:52,537 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:56:52,537 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:56:52,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:56:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash -183401910, now seen corresponding path program 1 times [2018-11-07 20:56:52,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:56:52,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:56:52,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:56:52,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:56:52,539 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:56:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:56:53,795 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-11-07 20:56:54,156 WARN L179 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2018-11-07 20:56:54,876 WARN L179 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2018-11-07 20:56:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2626 backedges. 617 proven. 886 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2018-11-07 20:56:56,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:56:56,707 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:56:56,707 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1081 with the following transitions: [2018-11-07 20:56:56,707 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], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [684], [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], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [972], [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], [1256], [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 20:56:56,712 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:56:56,712 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:56:56,791 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:56:59,833 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:56:59,834 INFO L272 AbstractInterpreter]: Visited 262 different actions 3152 times. Merged at 12 different actions 137 times. Widened at 1 different actions 7 times. Found 37 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 20:56:59,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:56:59,839 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:56:59,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:56:59,839 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 20:56:59,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:56:59,851 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:57:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:57:00,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:57:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2626 backedges. 1891 proven. 2 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2018-11-07 20:57:00,847 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:57:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2626 backedges. 768 proven. 322 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2018-11-07 20:57:01,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:57:01,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 16 [2018-11-07 20:57:01,664 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:57:01,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 20:57:01,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 20:57:01,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2018-11-07 20:57:01,668 INFO L87 Difference]: Start difference. First operand 12856 states and 13982 transitions. Second operand 15 states. [2018-11-07 20:57:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:57:11,589 INFO L93 Difference]: Finished difference Result 32111 states and 35156 transitions. [2018-11-07 20:57:11,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-07 20:57:11,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 1080 [2018-11-07 20:57:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:57:11,645 INFO L225 Difference]: With dead ends: 32111 [2018-11-07 20:57:11,645 INFO L226 Difference]: Without dead ends: 20230 [2018-11-07 20:57:11,691 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2248 GetRequests, 2192 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=603, Invalid=2367, Unknown=0, NotChecked=0, Total=2970 [2018-11-07 20:57:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20230 states. [2018-11-07 20:57:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20230 to 18574. [2018-11-07 20:57:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18574 states. [2018-11-07 20:57:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18574 states to 18574 states and 19940 transitions. [2018-11-07 20:57:12,113 INFO L78 Accepts]: Start accepts. Automaton has 18574 states and 19940 transitions. Word has length 1080 [2018-11-07 20:57:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:57:12,114 INFO L480 AbstractCegarLoop]: Abstraction has 18574 states and 19940 transitions. [2018-11-07 20:57:12,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 20:57:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 18574 states and 19940 transitions. [2018-11-07 20:57:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1380 [2018-11-07 20:57:12,157 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:57:12,158 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:57:12,158 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:57:12,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:57:12,159 INFO L82 PathProgramCache]: Analyzing trace with hash 262526523, now seen corresponding path program 1 times [2018-11-07 20:57:12,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:57:12,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:57:12,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:57:12,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:57:12,162 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:57:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:57:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4363 backedges. 946 proven. 406 refuted. 0 times theorem prover too weak. 3011 trivial. 0 not checked. [2018-11-07 20:57:13,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:57:13,762 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:57:13,762 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1380 with the following transitions: [2018-11-07 20:57:13,763 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], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [684], [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], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [964], [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], [1256], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1288], [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 20:57:13,767 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:57:13,767 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:57:14,068 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:57:14,938 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:57:14,938 INFO L272 AbstractInterpreter]: Visited 255 different actions 1518 times. Merged at 7 different actions 43 times. Widened at 1 different actions 2 times. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 20:57:14,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:57:14,943 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:57:18,293 INFO L227 lantSequenceWeakener]: Weakened 385 states. On average, predicates are now at 77.33% of their original sizes. [2018-11-07 20:57:18,294 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:57:18,999 INFO L415 sIntCurrentIteration]: We unified 1378 AI predicates to 1378 [2018-11-07 20:57:18,999 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:57:18,999 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:57:19,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2018-11-07 20:57:19,000 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:57:19,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 20:57:19,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 20:57:19,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-11-07 20:57:19,002 INFO L87 Difference]: Start difference. First operand 18574 states and 19940 transitions. Second operand 17 states. [2018-11-07 20:57:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:57:42,951 INFO L93 Difference]: Finished difference Result 38032 states and 40849 transitions. [2018-11-07 20:57:42,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-07 20:57:42,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1379 [2018-11-07 20:57:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:57:42,992 INFO L225 Difference]: With dead ends: 38032 [2018-11-07 20:57:42,992 INFO L226 Difference]: Without dead ends: 20433 [2018-11-07 20:57:43,022 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 1388 GetRequests, 1363 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2018-11-07 20:57:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20433 states. [2018-11-07 20:57:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20433 to 20427. [2018-11-07 20:57:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20427 states. [2018-11-07 20:57:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20427 states to 20427 states and 21861 transitions. [2018-11-07 20:57:43,305 INFO L78 Accepts]: Start accepts. Automaton has 20427 states and 21861 transitions. Word has length 1379 [2018-11-07 20:57:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:57:43,306 INFO L480 AbstractCegarLoop]: Abstraction has 20427 states and 21861 transitions. [2018-11-07 20:57:43,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 20:57:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 20427 states and 21861 transitions. [2018-11-07 20:57:43,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1382 [2018-11-07 20:57:43,339 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:57:43,340 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 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 20:57:43,341 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:57:43,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:57:43,341 INFO L82 PathProgramCache]: Analyzing trace with hash 650144159, now seen corresponding path program 1 times [2018-11-07 20:57:43,341 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:57:43,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:57:43,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:57:43,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:57:43,342 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:57:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:57:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4365 backedges. 946 proven. 406 refuted. 0 times theorem prover too weak. 3013 trivial. 0 not checked. [2018-11-07 20:57:45,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:57:45,630 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:57:45,630 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1382 with the following transitions: [2018-11-07 20:57:45,630 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], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [684], [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], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [964], [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], [1256], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1296], [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 20:57:45,634 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:57:45,634 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:57:46,393 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:57:46,801 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:57:46,801 INFO L272 AbstractInterpreter]: Visited 255 different actions 1012 times. Merged at 7 different actions 25 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 20:57:46,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:57:46,811 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:57:48,133 INFO L227 lantSequenceWeakener]: Weakened 773 states. On average, predicates are now at 77.62% of their original sizes. [2018-11-07 20:57:48,133 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:57:48,505 INFO L415 sIntCurrentIteration]: We unified 1380 AI predicates to 1380 [2018-11-07 20:57:48,505 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:57:48,506 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:57:48,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-11-07 20:57:48,506 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:57:48,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 20:57:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 20:57:48,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:57:48,508 INFO L87 Difference]: Start difference. First operand 20427 states and 21861 transitions. Second operand 20 states. [2018-11-07 20:58:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:58:10,651 INFO L93 Difference]: Finished difference Result 36279 states and 39004 transitions. [2018-11-07 20:58:10,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 20:58:10,652 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1381 [2018-11-07 20:58:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:58:10,700 INFO L225 Difference]: With dead ends: 36279 [2018-11-07 20:58:10,701 INFO L226 Difference]: Without dead ends: 21375 [2018-11-07 20:58:10,731 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 1392 GetRequests, 1362 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2018-11-07 20:58:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21375 states. [2018-11-07 20:58:11,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21375 to 21357. [2018-11-07 20:58:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21357 states. [2018-11-07 20:58:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21357 states to 21357 states and 22836 transitions. [2018-11-07 20:58:11,066 INFO L78 Accepts]: Start accepts. Automaton has 21357 states and 22836 transitions. Word has length 1381 [2018-11-07 20:58:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:58:11,067 INFO L480 AbstractCegarLoop]: Abstraction has 21357 states and 22836 transitions. [2018-11-07 20:58:11,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 20:58:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 21357 states and 22836 transitions. [2018-11-07 20:58:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1414 [2018-11-07 20:58:11,108 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:58:11,109 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 20:58:11,109 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:58:11,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:58:11,110 INFO L82 PathProgramCache]: Analyzing trace with hash 44904287, now seen corresponding path program 1 times [2018-11-07 20:58:11,110 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:58:11,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:11,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:58:11,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:58:11,112 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:58:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:58:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 946 proven. 406 refuted. 0 times theorem prover too weak. 3126 trivial. 0 not checked. [2018-11-07 20:58:14,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:58:14,567 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:58:14,568 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1414 with the following transitions: [2018-11-07 20:58:14,568 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], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [684], [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], [836], [837], [841], [845], [849], [853], [856], [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], [964], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1048], [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], [1256], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1288], [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 20:58:14,573 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:58:14,573 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-11-07 20:58:14,712 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-07 20:58:14,713 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-07 20:58:14,714 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 20:58:14,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:58:14,714 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 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 [2018-11-07 20:58:14,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:58:14,733 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:58:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:58:15,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:58:15,143 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 20:58:15,344 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 20:58:15,345 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 20:58:15,350 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 20:58:15,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:58:15 BoogieIcfgContainer [2018-11-07 20:58:15,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 20:58:15,352 INFO L168 Benchmark]: Toolchain (without parser) took 210054.82 ms. Allocated memory was 1.5 GB in the beginning and 4.5 GB in the end (delta: 3.0 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-11-07 20:58:15,353 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-11-07 20:58:15,353 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1186.73 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-11-07 20:58:15,354 INFO L168 Benchmark]: Boogie Procedure Inliner took 206.68 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -884.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2018-11-07 20:58:15,355 INFO L168 Benchmark]: Boogie Preprocessor took 176.00 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:58:15,356 INFO L168 Benchmark]: RCFGBuilder took 6064.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 265.7 MB). Peak memory consumption was 265.7 MB. Max. memory is 7.1 GB. [2018-11-07 20:58:15,358 INFO L168 Benchmark]: TraceAbstraction took 202416.14 ms. Allocated memory was 2.3 GB in the beginning and 4.5 GB in the end (delta: 2.2 GB). Free memory was 2.0 GB in the beginning and 2.7 GB in the end (delta: -766.2 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-07 20:58:15,363 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1186.73 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 206.68 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -884.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 176.00 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 6064.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 265.7 MB). Peak memory consumption was 265.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 202416.14 ms. Allocated memory was 2.3 GB in the beginning and 4.5 GB in the end (delta: 2.2 GB). Free memory was 2.0 GB in the beginning and 2.7 GB in the end (delta: -766.2 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 154]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 154). Cancelled while BasicCegarLoop was analyzing trace of length 1414 with TraceHistMax 10,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 6 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 202.3s OverallTime, 12 OverallIterations, 10 TraceHistogramMax, 150.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1842 SDtfs, 30683 SDslu, 2571 SDs, 0 SdLazy, 38302 SolverSat, 6719 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.5s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 9117 GetRequests, 8752 SyntacticMatches, 126 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3154 ImplicationChecksByTransitivity, 12.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21357occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 11.3s AbstIntTime, 9 AbstIntIterations, 5 AbstIntStrong, 0.9980406720390077 AbsIntWeakeningRatio, 0.053923541247484906 AbsIntAvgWeakeningVarsNumRemoved, 15.927162977867203 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 2723 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 9200 NumberOfCodeBlocks, 9200 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 11140 ConstructedInterpolants, 0 QuantifiedInterpolants, 25383579 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2836 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 21754/25721 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown