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.epf -i ../../../trunk/examples/svcomp/loops/eureka_01_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 16:33:48,321 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 16:33:48,326 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 16:33:48,343 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 16:33:48,343 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 16:33:48,344 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 16:33:48,345 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 16:33:48,347 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 16:33:48,349 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 16:33:48,350 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 16:33:48,351 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 16:33:48,351 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 16:33:48,352 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 16:33:48,353 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 16:33:48,354 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 16:33:48,355 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 16:33:48,356 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 16:33:48,358 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 16:33:48,360 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 16:33:48,361 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 16:33:48,363 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 16:33:48,364 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 16:33:48,366 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 16:33:48,367 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 16:33:48,367 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 16:33:48,368 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 16:33:48,369 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 16:33:48,370 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 16:33:48,371 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 16:33:48,372 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 16:33:48,372 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 16:33:48,373 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 16:33:48,373 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 16:33:48,373 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 16:33:48,374 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 16:33:48,375 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 16:33:48,375 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.epf [2018-11-07 16:33:48,395 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 16:33:48,395 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 16:33:48,396 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 16:33:48,397 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 16:33:48,397 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 16:33:48,397 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 16:33:48,397 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 16:33:48,397 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 16:33:48,398 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 16:33:48,398 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 16:33:48,398 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 16:33:48,398 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 16:33:48,399 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 16:33:48,399 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 16:33:48,399 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 16:33:48,400 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 16:33:48,400 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 16:33:48,400 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 16:33:48,400 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 16:33:48,400 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 16:33:48,401 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 16:33:48,401 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 16:33:48,401 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 16:33:48,401 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 16:33:48,401 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 16:33:48,401 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 16:33:48,402 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 16:33:48,402 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 16:33:48,402 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 16:33:48,402 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 16:33:48,402 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 16:33:48,403 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 16:33:48,403 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 16:33:48,403 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 16:33:48,450 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 16:33:48,468 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 16:33:48,472 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 16:33:48,473 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 16:33:48,474 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 16:33:48,475 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01_true-unreach-call.i [2018-11-07 16:33:48,538 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2c9ef39/fefe166ee140485ca35da32c0f77ba28/FLAGb0f90c5c7 [2018-11-07 16:33:49,018 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 16:33:49,019 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01_true-unreach-call.i [2018-11-07 16:33:49,027 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2c9ef39/fefe166ee140485ca35da32c0f77ba28/FLAGb0f90c5c7 [2018-11-07 16:33:49,043 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2c9ef39/fefe166ee140485ca35da32c0f77ba28 [2018-11-07 16:33:49,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 16:33:49,056 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 16:33:49,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 16:33:49,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 16:33:49,061 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 16:33:49,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:33:49" (1/1) ... [2018-11-07 16:33:49,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d6e0ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49, skipping insertion in model container [2018-11-07 16:33:49,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:33:49" (1/1) ... [2018-11-07 16:33:49,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 16:33:49,101 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 16:33:49,383 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 16:33:49,393 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 16:33:49,447 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 16:33:49,469 INFO L193 MainTranslator]: Completed translation [2018-11-07 16:33:49,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49 WrapperNode [2018-11-07 16:33:49,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 16:33:49,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 16:33:49,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 16:33:49,471 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 16:33:49,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49" (1/1) ... [2018-11-07 16:33:49,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49" (1/1) ... [2018-11-07 16:33:49,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 16:33:49,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 16:33:49,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 16:33:49,516 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 16:33:49,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49" (1/1) ... [2018-11-07 16:33:49,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49" (1/1) ... [2018-11-07 16:33:49,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49" (1/1) ... [2018-11-07 16:33:49,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49" (1/1) ... [2018-11-07 16:33:49,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49" (1/1) ... [2018-11-07 16:33:49,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49" (1/1) ... [2018-11-07 16:33:49,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49" (1/1) ... [2018-11-07 16:33:49,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 16:33:49,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 16:33:49,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 16:33:49,592 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 16:33:49,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49" (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 16:33:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-07 16:33:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 16:33:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 16:33:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-07 16:33:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 16:33:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 16:33:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 16:33:49,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 16:33:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-07 16:33:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-07 16:33:49,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-07 16:33:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-07 16:33:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-07 16:33:50,724 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 16:33:50,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:33:50 BoogieIcfgContainer [2018-11-07 16:33:50,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 16:33:50,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 16:33:50,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 16:33:50,729 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 16:33:50,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:33:49" (1/3) ... [2018-11-07 16:33:50,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4dafb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:33:50, skipping insertion in model container [2018-11-07 16:33:50,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:49" (2/3) ... [2018-11-07 16:33:50,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4dafb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:33:50, skipping insertion in model container [2018-11-07 16:33:50,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:33:50" (3/3) ... [2018-11-07 16:33:50,733 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_01_true-unreach-call.i [2018-11-07 16:33:50,744 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 16:33:50,753 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 16:33:50,771 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 16:33:50,808 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 16:33:50,808 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 16:33:50,808 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 16:33:50,808 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 16:33:50,809 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 16:33:50,809 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 16:33:50,809 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 16:33:50,809 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 16:33:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2018-11-07 16:33:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-11-07 16:33:50,844 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:33:50,845 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, 1, 1, 1, 1, 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 16:33:50,847 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:33:50,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:50,853 INFO L82 PathProgramCache]: Analyzing trace with hash 858599657, now seen corresponding path program 1 times [2018-11-07 16:33:50,855 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:33:50,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:50,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:33:50,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:50,901 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:33:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:51,165 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 16:33:51,168 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 16:33:51,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-07 16:33:51,168 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 16:33:51,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-07 16:33:51,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-07 16:33:51,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-07 16:33:51,192 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 2 states. [2018-11-07 16:33:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:33:51,232 INFO L93 Difference]: Finished difference Result 207 states and 231 transitions. [2018-11-07 16:33:51,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-07 16:33:51,234 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 84 [2018-11-07 16:33:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:33:51,246 INFO L225 Difference]: With dead ends: 207 [2018-11-07 16:33:51,246 INFO L226 Difference]: Without dead ends: 121 [2018-11-07 16:33:51,250 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-07 16:33:51,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-11-07 16:33:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-11-07 16:33:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-11-07 16:33:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2018-11-07 16:33:51,301 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 84 [2018-11-07 16:33:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:33:51,304 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2018-11-07 16:33:51,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-07 16:33:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2018-11-07 16:33:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-11-07 16:33:51,311 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:33:51,312 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, 1, 1, 1, 1, 1, 1, 1, 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 16:33:51,312 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:33:51,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:51,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1678531354, now seen corresponding path program 1 times [2018-11-07 16:33:51,313 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:33:51,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:51,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:33:51,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:51,316 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:33:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:51,665 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 16:33:51,666 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 16:33:51,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 16:33:51,666 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 16:33:51,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 16:33:51,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 16:33:51,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 16:33:51,669 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand 4 states. [2018-11-07 16:33:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:33:51,900 INFO L93 Difference]: Finished difference Result 207 states and 224 transitions. [2018-11-07 16:33:51,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 16:33:51,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2018-11-07 16:33:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:33:51,906 INFO L225 Difference]: With dead ends: 207 [2018-11-07 16:33:51,907 INFO L226 Difference]: Without dead ends: 163 [2018-11-07 16:33:51,908 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 16:33:51,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-11-07 16:33:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2018-11-07 16:33:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-11-07 16:33:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2018-11-07 16:33:51,927 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 87 [2018-11-07 16:33:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:33:51,927 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2018-11-07 16:33:51,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 16:33:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2018-11-07 16:33:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-07 16:33:51,930 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:33:51,930 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:33:51,931 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:33:51,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:51,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1900720706, now seen corresponding path program 1 times [2018-11-07 16:33:51,931 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:33:51,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:51,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:33:51,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:51,933 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:33:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-07 16:33:52,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:33:52,166 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:33:52,167 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 98 with the following transitions: [2018-11-07 16:33:52,169 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], [38], [39], [40], [41], [42], [43], [44], [45], [46], [47], [48], [49], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59], [60], [61], [62], [63], [64], [65], [66], [67], [68], [69], [70], [74], [77], [79], [82], [83], [88], [92], [96], [99], [101], [105], [108], [132], [136], [140], [143], [170], [174], [179], [180], [198], [201], [203], [209], [210], [211], [213] [2018-11-07 16:33:52,214 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 16:33:52,214 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 16:33:52,450 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 16:33:52,451 INFO L272 AbstractInterpreter]: Visited 77 different actions 81 times. Merged at 3 different actions 3 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 30 variables. [2018-11-07 16:33:52,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:52,463 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 16:33:52,798 INFO L227 lantSequenceWeakener]: Weakened 76 states. On average, predicates are now at 64.62% of their original sizes. [2018-11-07 16:33:52,798 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 16:33:53,384 INFO L415 sIntCurrentIteration]: We unified 96 AI predicates to 96 [2018-11-07 16:33:53,386 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 16:33:53,387 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 16:33:53,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2018-11-07 16:33:53,389 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 16:33:53,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 16:33:53,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 16:33:53,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 16:33:53,391 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand 10 states. [2018-11-07 16:33:56,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:33:56,312 INFO L93 Difference]: Finished difference Result 252 states and 276 transitions. [2018-11-07 16:33:56,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 16:33:56,312 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2018-11-07 16:33:56,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:33:56,315 INFO L225 Difference]: With dead ends: 252 [2018-11-07 16:33:56,315 INFO L226 Difference]: Without dead ends: 200 [2018-11-07 16:33:56,316 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2018-11-07 16:33:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-11-07 16:33:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 160. [2018-11-07 16:33:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-11-07 16:33:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 168 transitions. [2018-11-07 16:33:56,335 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 168 transitions. Word has length 97 [2018-11-07 16:33:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:33:56,336 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 168 transitions. [2018-11-07 16:33:56,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 16:33:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 168 transitions. [2018-11-07 16:33:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-07 16:33:56,339 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:33:56,339 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:33:56,340 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:33:56,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:56,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1848574906, now seen corresponding path program 1 times [2018-11-07 16:33:56,340 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:33:56,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:56,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:33:56,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:56,342 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:33:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-07 16:33:56,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:33:56,871 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:33:56,871 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 130 with the following transitions: [2018-11-07 16:33:56,872 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], [38], [39], [40], [41], [42], [43], [44], [45], [46], [47], [48], [49], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59], [60], [61], [62], [63], [64], [65], [66], [67], [68], [69], [70], [74], [77], [79], [82], [83], [85], [86], [88], [92], [96], [99], [101], [105], [108], [132], [136], [140], [143], [145], [146], [147], [148], [149], [150], [151], [152], [164], [166], [170], [174], [179], [180], [198], [201], [203], [209], [210], [211], [213] [2018-11-07 16:33:56,879 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 16:33:56,880 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 16:33:56,970 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 16:33:56,970 INFO L272 AbstractInterpreter]: Visited 85 different actions 119 times. Merged at 5 different actions 24 times. Widened at 1 different actions 1 times. Found 6 fixpoints after 2 different actions. Largest state had 36 variables. [2018-11-07 16:33:57,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:57,007 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 16:33:57,156 INFO L227 lantSequenceWeakener]: Weakened 92 states. On average, predicates are now at 39.43% of their original sizes. [2018-11-07 16:33:57,157 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 16:33:57,610 INFO L415 sIntCurrentIteration]: We unified 128 AI predicates to 128 [2018-11-07 16:33:57,611 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 16:33:57,611 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 16:33:57,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2018-11-07 16:33:57,612 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 16:33:57,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 16:33:57,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 16:33:57,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2018-11-07 16:33:57,614 INFO L87 Difference]: Start difference. First operand 160 states and 168 transitions. Second operand 17 states. [2018-11-07 16:34:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:34:02,224 INFO L93 Difference]: Finished difference Result 311 states and 335 transitions. [2018-11-07 16:34:02,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 16:34:02,225 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 129 [2018-11-07 16:34:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:34:02,227 INFO L225 Difference]: With dead ends: 311 [2018-11-07 16:34:02,227 INFO L226 Difference]: Without dead ends: 225 [2018-11-07 16:34:02,228 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2018-11-07 16:34:02,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-11-07 16:34:02,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 163. [2018-11-07 16:34:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-11-07 16:34:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 171 transitions. [2018-11-07 16:34:02,254 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 171 transitions. Word has length 129 [2018-11-07 16:34:02,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:34:02,255 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 171 transitions. [2018-11-07 16:34:02,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 16:34:02,255 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 171 transitions. [2018-11-07 16:34:02,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-11-07 16:34:02,262 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:34:02,262 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:34:02,263 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:34:02,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:34:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash 578995617, now seen corresponding path program 1 times [2018-11-07 16:34:02,263 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:34:02,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:02,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:34:02,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:02,265 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:34:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:34:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-07 16:34:02,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:02,523 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:34:02,524 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 141 with the following transitions: [2018-11-07 16:34:02,524 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], [38], [39], [40], [41], [42], [43], [44], [45], [46], [47], [48], [49], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59], [60], [61], [62], [63], [64], [65], [66], [67], [68], [69], [70], [74], [77], [79], [82], [83], [85], [86], [88], [92], [96], [99], [101], [105], [108], [110], [111], [112], [113], [114], [115], [116], [117], [126], [128], [132], [136], [140], [143], [145], [146], [147], [148], [149], [150], [151], [152], [164], [166], [170], [174], [179], [180], [198], [201], [203], [209], [210], [211], [213] [2018-11-07 16:34:02,528 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 16:34:02,528 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 16:34:02,659 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 16:34:02,660 INFO L272 AbstractInterpreter]: Visited 117 different actions 290 times. Merged at 31 different actions 150 times. Widened at 4 different actions 4 times. Found 10 fixpoints after 5 different actions. Largest state had 42 variables. [2018-11-07 16:34:02,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:34:02,703 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 16:34:02,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:02,704 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 16:34:02,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:34:02,721 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 16:34:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:34:02,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:34:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-07 16:34:03,117 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:34:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-07 16:34:03,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:34:03,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2018-11-07 16:34:03,280 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:34:03,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 16:34:03,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 16:34:03,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-11-07 16:34:03,281 INFO L87 Difference]: Start difference. First operand 163 states and 171 transitions. Second operand 9 states. [2018-11-07 16:34:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:34:04,159 INFO L93 Difference]: Finished difference Result 329 states and 354 transitions. [2018-11-07 16:34:04,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 16:34:04,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 140 [2018-11-07 16:34:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:34:04,164 INFO L225 Difference]: With dead ends: 329 [2018-11-07 16:34:04,164 INFO L226 Difference]: Without dead ends: 250 [2018-11-07 16:34:04,169 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-11-07 16:34:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-11-07 16:34:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 190. [2018-11-07 16:34:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-11-07 16:34:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 200 transitions. [2018-11-07 16:34:04,203 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 200 transitions. Word has length 140 [2018-11-07 16:34:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:34:04,204 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 200 transitions. [2018-11-07 16:34:04,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 16:34:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 200 transitions. [2018-11-07 16:34:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-07 16:34:04,213 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:34:04,213 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:34:04,214 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:34:04,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:34:04,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1249942257, now seen corresponding path program 2 times [2018-11-07 16:34:04,214 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:34:04,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:04,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:34:04,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:04,218 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:34:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:34:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-07 16:34:04,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:04,605 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:34:04,605 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:34:04,605 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:34:04,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:04,605 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 16:34:04,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 16:34:04,616 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 16:34:16,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-07 16:34:16,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:34:16,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:34:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-11-07 16:34:16,791 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:34:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-11-07 16:34:17,058 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 16:34:17,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 11 [2018-11-07 16:34:17,058 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 16:34:17,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 16:34:17,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 16:34:17,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-11-07 16:34:17,059 INFO L87 Difference]: Start difference. First operand 190 states and 200 transitions. Second operand 4 states. [2018-11-07 16:34:17,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:34:17,192 INFO L93 Difference]: Finished difference Result 292 states and 311 transitions. [2018-11-07 16:34:17,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 16:34:17,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2018-11-07 16:34:17,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:34:17,195 INFO L225 Difference]: With dead ends: 292 [2018-11-07 16:34:17,195 INFO L226 Difference]: Without dead ends: 233 [2018-11-07 16:34:17,196 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-11-07 16:34:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-11-07 16:34:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 194. [2018-11-07 16:34:17,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-11-07 16:34:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 204 transitions. [2018-11-07 16:34:17,221 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 204 transitions. Word has length 150 [2018-11-07 16:34:17,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:34:17,221 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 204 transitions. [2018-11-07 16:34:17,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 16:34:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 204 transitions. [2018-11-07 16:34:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-11-07 16:34:17,231 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:34:17,231 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:34:17,231 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:34:17,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:34:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1339962079, now seen corresponding path program 3 times [2018-11-07 16:34:17,232 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:34:17,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:17,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 16:34:17,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:17,234 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:34:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:34:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-07 16:34:17,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:17,435 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:34:17,436 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:34:17,436 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:34:17,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:17,436 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 16:34:17,445 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-07 16:34:17,445 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-07 16:34:17,501 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-07 16:34:17,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:34:17,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:34:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-11-07 16:34:17,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:34:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-11-07 16:34:18,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:34:18,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2018-11-07 16:34:18,002 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:34:18,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 16:34:18,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 16:34:18,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2018-11-07 16:34:18,004 INFO L87 Difference]: Start difference. First operand 194 states and 204 transitions. Second operand 12 states. [2018-11-07 16:34:19,025 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 16:34:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:34:20,323 INFO L93 Difference]: Finished difference Result 701 states and 766 transitions. [2018-11-07 16:34:20,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-07 16:34:20,324 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 172 [2018-11-07 16:34:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:34:20,327 INFO L225 Difference]: With dead ends: 701 [2018-11-07 16:34:20,328 INFO L226 Difference]: Without dead ends: 444 [2018-11-07 16:34:20,330 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 345 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=476, Invalid=1330, Unknown=0, NotChecked=0, Total=1806 [2018-11-07 16:34:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2018-11-07 16:34:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 279. [2018-11-07 16:34:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-11-07 16:34:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 296 transitions. [2018-11-07 16:34:20,353 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 296 transitions. Word has length 172 [2018-11-07 16:34:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:34:20,353 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 296 transitions. [2018-11-07 16:34:20,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 16:34:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 296 transitions. [2018-11-07 16:34:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-07 16:34:20,357 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:34:20,358 INFO L375 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:34:20,358 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:34:20,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:34:20,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1987034330, now seen corresponding path program 4 times [2018-11-07 16:34:20,359 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:34:20,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:20,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 16:34:20,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:20,360 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:34:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:34:20,901 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-11-07 16:34:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2018-11-07 16:34:20,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:20,966 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:34:20,966 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:34:20,967 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:34:20,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:20,967 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 16:34:20,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:34:20,976 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 16:34:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:34:21,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:34:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2018-11-07 16:34:21,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:34:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2018-11-07 16:34:21,397 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 16:34:21,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 15 [2018-11-07 16:34:21,397 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 16:34:21,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 16:34:21,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 16:34:21,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-11-07 16:34:21,398 INFO L87 Difference]: Start difference. First operand 279 states and 296 transitions. Second operand 6 states. [2018-11-07 16:34:21,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:34:21,637 INFO L93 Difference]: Finished difference Result 486 states and 521 transitions. [2018-11-07 16:34:21,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 16:34:21,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 237 [2018-11-07 16:34:21,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:34:21,640 INFO L225 Difference]: With dead ends: 486 [2018-11-07 16:34:21,640 INFO L226 Difference]: Without dead ends: 295 [2018-11-07 16:34:21,641 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-11-07 16:34:21,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-11-07 16:34:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 274. [2018-11-07 16:34:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-11-07 16:34:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 289 transitions. [2018-11-07 16:34:21,657 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 289 transitions. Word has length 237 [2018-11-07 16:34:21,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:34:21,662 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 289 transitions. [2018-11-07 16:34:21,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 16:34:21,663 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 289 transitions. [2018-11-07 16:34:21,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-07 16:34:21,665 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:34:21,666 INFO L375 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:34:21,666 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:34:21,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:34:21,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1037656774, now seen corresponding path program 5 times [2018-11-07 16:34:21,667 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:34:21,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:21,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:34:21,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:21,668 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:34:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:34:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2018-11-07 16:34:22,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:22,388 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:34:22,388 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:34:22,388 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:34:22,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:22,388 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:34:22,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 16:34:22,407 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 16:34:40,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-07 16:34:40,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:34:40,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:34:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2018-11-07 16:34:41,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:34:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2018-11-07 16:34:41,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:34:41,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2018-11-07 16:34:41,455 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:34:41,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 16:34:41,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 16:34:41,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-11-07 16:34:41,457 INFO L87 Difference]: Start difference. First operand 274 states and 289 transitions. Second operand 12 states. [2018-11-07 16:34:41,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:34:41,812 INFO L93 Difference]: Finished difference Result 565 states and 606 transitions. [2018-11-07 16:34:41,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 16:34:41,813 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 237 [2018-11-07 16:34:41,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:34:41,816 INFO L225 Difference]: With dead ends: 565 [2018-11-07 16:34:41,816 INFO L226 Difference]: Without dead ends: 384 [2018-11-07 16:34:41,817 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2018-11-07 16:34:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2018-11-07 16:34:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 325. [2018-11-07 16:34:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-11-07 16:34:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 343 transitions. [2018-11-07 16:34:41,837 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 343 transitions. Word has length 237 [2018-11-07 16:34:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:34:41,837 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 343 transitions. [2018-11-07 16:34:41,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 16:34:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 343 transitions. [2018-11-07 16:34:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-11-07 16:34:41,839 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:34:41,840 INFO L375 BasicCegarLoop]: trace histogram [15, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:34:41,840 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:34:41,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:34:41,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1240309558, now seen corresponding path program 6 times [2018-11-07 16:34:41,840 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:34:41,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:41,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 16:34:41,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:41,841 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:34:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:34:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 226 proven. 15 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2018-11-07 16:34:42,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:42,031 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:34:42,031 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:34:42,031 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:34:42,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:42,031 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:34:42,040 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-07 16:34:42,040 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-07 16:34:42,113 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-07 16:34:42,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:34:42,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:34:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 49 proven. 231 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-11-07 16:34:42,360 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:34:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 49 proven. 231 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-11-07 16:34:42,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:34:42,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 16 [2018-11-07 16:34:42,521 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:34:42,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 16:34:42,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 16:34:42,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-11-07 16:34:42,522 INFO L87 Difference]: Start difference. First operand 325 states and 343 transitions. Second operand 13 states. [2018-11-07 16:34:42,869 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-11-07 16:34:43,274 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-11-07 16:34:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:34:43,627 INFO L93 Difference]: Finished difference Result 657 states and 704 transitions. [2018-11-07 16:34:43,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 16:34:43,628 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 280 [2018-11-07 16:34:43,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:34:43,631 INFO L225 Difference]: With dead ends: 657 [2018-11-07 16:34:43,631 INFO L226 Difference]: Without dead ends: 465 [2018-11-07 16:34:43,632 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 547 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-11-07 16:34:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2018-11-07 16:34:43,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 400. [2018-11-07 16:34:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-11-07 16:34:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 423 transitions. [2018-11-07 16:34:43,653 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 423 transitions. Word has length 280 [2018-11-07 16:34:43,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:34:43,654 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 423 transitions. [2018-11-07 16:34:43,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 16:34:43,654 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 423 transitions. [2018-11-07 16:34:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2018-11-07 16:34:43,656 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:34:43,656 INFO L375 BasicCegarLoop]: trace histogram [20, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:34:43,657 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:34:43,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:34:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash -454104267, now seen corresponding path program 7 times [2018-11-07 16:34:43,657 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:34:43,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:43,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 16:34:43,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:43,658 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:34:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:34:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 462 proven. 39 refuted. 0 times theorem prover too weak. 959 trivial. 0 not checked. [2018-11-07 16:34:44,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:44,275 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:34:44,276 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:34:44,276 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:34:44,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:44,276 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:34:44,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:34:44,287 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 16:34:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:34:44,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:34:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 462 proven. 39 refuted. 0 times theorem prover too weak. 959 trivial. 0 not checked. [2018-11-07 16:34:44,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:34:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 462 proven. 39 refuted. 0 times theorem prover too weak. 959 trivial. 0 not checked. [2018-11-07 16:34:44,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:34:44,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2018-11-07 16:34:44,782 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:34:44,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 16:34:44,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 16:34:44,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2018-11-07 16:34:44,783 INFO L87 Difference]: Start difference. First operand 400 states and 423 transitions. Second operand 11 states. [2018-11-07 16:34:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:34:44,878 INFO L93 Difference]: Finished difference Result 792 states and 848 transitions. [2018-11-07 16:34:44,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 16:34:44,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 335 [2018-11-07 16:34:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:34:44,881 INFO L225 Difference]: With dead ends: 792 [2018-11-07 16:34:44,881 INFO L226 Difference]: Without dead ends: 540 [2018-11-07 16:34:44,881 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2018-11-07 16:34:44,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2018-11-07 16:34:44,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 475. [2018-11-07 16:34:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2018-11-07 16:34:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 503 transitions. [2018-11-07 16:34:44,905 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 503 transitions. Word has length 335 [2018-11-07 16:34:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:34:44,906 INFO L480 AbstractCegarLoop]: Abstraction has 475 states and 503 transitions. [2018-11-07 16:34:44,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 16:34:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 503 transitions. [2018-11-07 16:34:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-11-07 16:34:44,909 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:34:44,909 INFO L375 BasicCegarLoop]: trace histogram [25, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:34:44,909 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:34:44,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:34:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1945752214, now seen corresponding path program 8 times [2018-11-07 16:34:44,910 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:34:44,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:44,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:34:44,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:34:44,911 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:34:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:34:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2445 backedges. 786 proven. 74 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2018-11-07 16:34:45,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:45,798 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:34:45,798 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:34:45,798 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:34:45,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:34:45,799 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:34:45,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 16:34:45,818 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 16:35:17,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-07 16:35:17,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:35:17,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:35:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2445 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2406 trivial. 0 not checked. [2018-11-07 16:35:17,506 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:35:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2445 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2406 trivial. 0 not checked. [2018-11-07 16:35:17,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:35:17,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2018-11-07 16:35:17,703 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:35:17,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 16:35:17,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 16:35:17,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-11-07 16:35:17,704 INFO L87 Difference]: Start difference. First operand 475 states and 503 transitions. Second operand 12 states. [2018-11-07 16:35:18,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:35:18,500 INFO L93 Difference]: Finished difference Result 971 states and 1041 transitions. [2018-11-07 16:35:18,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-07 16:35:18,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 390 [2018-11-07 16:35:18,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:35:18,505 INFO L225 Difference]: With dead ends: 971 [2018-11-07 16:35:18,505 INFO L226 Difference]: Without dead ends: 659 [2018-11-07 16:35:18,506 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=572, Invalid=1068, Unknown=0, NotChecked=0, Total=1640 [2018-11-07 16:35:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2018-11-07 16:35:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 561. [2018-11-07 16:35:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 561 states. [2018-11-07 16:35:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 594 transitions. [2018-11-07 16:35:18,535 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 594 transitions. Word has length 390 [2018-11-07 16:35:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:35:18,536 INFO L480 AbstractCegarLoop]: Abstraction has 561 states and 594 transitions. [2018-11-07 16:35:18,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 16:35:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 594 transitions. [2018-11-07 16:35:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2018-11-07 16:35:18,540 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:35:18,540 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:35:18,541 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:35:18,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:35:18,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1620014963, now seen corresponding path program 9 times [2018-11-07 16:35:18,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:35:18,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:35:18,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 16:35:18,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:35:18,542 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:35:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:35:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3740 backedges. 1198 proven. 120 refuted. 0 times theorem prover too weak. 2422 trivial. 0 not checked. [2018-11-07 16:35:19,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:35:19,499 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:35:19,499 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:35:19,499 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:35:19,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:35:19,499 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:35:19,527 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-07 16:35:19,527 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-07 16:35:19,633 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-07 16:35:19,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:35:19,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:35:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3740 backedges. 84 proven. 1080 refuted. 0 times theorem prover too weak. 2576 trivial. 0 not checked. [2018-11-07 16:35:21,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:35:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3740 backedges. 84 proven. 1080 refuted. 0 times theorem prover too weak. 2576 trivial. 0 not checked. [2018-11-07 16:35:21,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:35:21,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 25 [2018-11-07 16:35:21,556 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:35:21,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 16:35:21,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 16:35:21,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2018-11-07 16:35:21,558 INFO L87 Difference]: Start difference. First operand 561 states and 594 transitions. Second operand 20 states. [2018-11-07 16:35:23,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:35:23,417 INFO L93 Difference]: Finished difference Result 1243 states and 1332 transitions. [2018-11-07 16:35:23,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-07 16:35:23,417 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 456 [2018-11-07 16:35:23,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:35:23,422 INFO L225 Difference]: With dead ends: 1243 [2018-11-07 16:35:23,422 INFO L226 Difference]: Without dead ends: 860 [2018-11-07 16:35:23,425 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 896 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1167, Invalid=3803, Unknown=0, NotChecked=0, Total=4970 [2018-11-07 16:35:23,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2018-11-07 16:35:23,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 647. [2018-11-07 16:35:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2018-11-07 16:35:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 685 transitions. [2018-11-07 16:35:23,457 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 685 transitions. Word has length 456 [2018-11-07 16:35:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:35:23,458 INFO L480 AbstractCegarLoop]: Abstraction has 647 states and 685 transitions. [2018-11-07 16:35:23,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 16:35:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 685 transitions. [2018-11-07 16:35:23,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2018-11-07 16:35:23,462 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:35:23,462 INFO L375 BasicCegarLoop]: trace histogram [35, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:35:23,462 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:35:23,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:35:23,463 INFO L82 PathProgramCache]: Analyzing trace with hash 480769418, now seen corresponding path program 10 times [2018-11-07 16:35:23,463 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:35:23,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:35:23,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 16:35:23,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:35:23,464 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:35:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:35:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5321 backedges. 1698 proven. 177 refuted. 0 times theorem prover too weak. 3446 trivial. 0 not checked. [2018-11-07 16:35:23,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:35:23,843 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:35:23,843 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:35:23,843 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:35:23,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:35:23,843 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:35:23,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:35:23,852 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 16:35:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:35:24,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:35:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5321 backedges. 1698 proven. 177 refuted. 0 times theorem prover too weak. 3446 trivial. 0 not checked. [2018-11-07 16:35:24,499 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:35:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5321 backedges. 1698 proven. 177 refuted. 0 times theorem prover too weak. 3446 trivial. 0 not checked. [2018-11-07 16:35:24,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:35:24,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2018-11-07 16:35:24,958 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:35:24,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 16:35:24,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 16:35:24,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2018-11-07 16:35:24,960 INFO L87 Difference]: Start difference. First operand 647 states and 685 transitions. Second operand 17 states. [2018-11-07 16:35:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:35:25,215 INFO L93 Difference]: Finished difference Result 1241 states and 1324 transitions. [2018-11-07 16:35:25,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 16:35:25,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 522 [2018-11-07 16:35:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:35:25,218 INFO L225 Difference]: With dead ends: 1241 [2018-11-07 16:35:25,219 INFO L226 Difference]: Without dead ends: 787 [2018-11-07 16:35:25,220 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 1030 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2018-11-07 16:35:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2018-11-07 16:35:25,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 722. [2018-11-07 16:35:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2018-11-07 16:35:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 765 transitions. [2018-11-07 16:35:25,252 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 765 transitions. Word has length 522 [2018-11-07 16:35:25,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:35:25,253 INFO L480 AbstractCegarLoop]: Abstraction has 722 states and 765 transitions. [2018-11-07 16:35:25,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 16:35:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 765 transitions. [2018-11-07 16:35:25,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2018-11-07 16:35:25,257 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:35:25,258 INFO L375 BasicCegarLoop]: trace histogram [40, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:35:25,258 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:35:25,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:35:25,259 INFO L82 PathProgramCache]: Analyzing trace with hash 922252597, now seen corresponding path program 11 times [2018-11-07 16:35:25,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:35:25,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:35:25,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:35:25,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:35:25,260 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:35:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:35:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7131 backedges. 2286 proven. 245 refuted. 0 times theorem prover too weak. 4600 trivial. 0 not checked. [2018-11-07 16:35:25,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:35:25,897 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:35:25,897 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:35:25,897 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:35:25,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:35:25,898 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:35:25,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 16:35:25,907 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 16:35:57,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-07 16:35:57,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:35:57,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:35:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7131 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 7011 trivial. 0 not checked. [2018-11-07 16:35:57,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:35:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7131 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 7011 trivial. 0 not checked. [2018-11-07 16:35:58,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:35:58,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2018-11-07 16:35:58,225 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:35:58,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 16:35:58,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 16:35:58,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2018-11-07 16:35:58,226 INFO L87 Difference]: Start difference. First operand 722 states and 765 transitions. Second operand 17 states. [2018-11-07 16:36:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:36:00,320 INFO L93 Difference]: Finished difference Result 1716 states and 1839 transitions. [2018-11-07 16:36:00,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-11-07 16:36:00,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 577 [2018-11-07 16:36:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:36:00,326 INFO L225 Difference]: With dead ends: 1716 [2018-11-07 16:36:00,326 INFO L226 Difference]: Without dead ends: 1202 [2018-11-07 16:36:00,330 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1219 GetRequests, 1142 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2020, Invalid=4142, Unknown=0, NotChecked=0, Total=6162 [2018-11-07 16:36:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2018-11-07 16:36:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 808. [2018-11-07 16:36:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-11-07 16:36:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 856 transitions. [2018-11-07 16:36:00,370 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 856 transitions. Word has length 577 [2018-11-07 16:36:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:36:00,371 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 856 transitions. [2018-11-07 16:36:00,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 16:36:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 856 transitions. [2018-11-07 16:36:00,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2018-11-07 16:36:00,376 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:36:00,376 INFO L375 BasicCegarLoop]: trace histogram [45, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:36:00,377 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:36:00,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:36:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash 319324606, now seen corresponding path program 12 times [2018-11-07 16:36:00,377 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:36:00,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:36:00,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 16:36:00,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:36:00,378 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:36:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:36:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9273 backedges. 2962 proven. 324 refuted. 0 times theorem prover too weak. 5987 trivial. 0 not checked. [2018-11-07 16:36:01,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:36:01,114 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:36:01,114 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:36:01,114 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:36:01,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:36:01,114 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:36:01,127 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-07 16:36:01,127 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-07 16:36:01,282 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-07 16:36:01,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:36:01,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:36:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9273 backedges. 255 proven. 2848 refuted. 0 times theorem prover too weak. 6170 trivial. 0 not checked. [2018-11-07 16:36:02,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:36:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9273 backedges. 255 proven. 2848 refuted. 0 times theorem prover too weak. 6170 trivial. 0 not checked. [2018-11-07 16:36:02,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:36:02,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 37 [2018-11-07 16:36:02,953 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:36:02,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-07 16:36:02,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-07 16:36:02,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2018-11-07 16:36:02,955 INFO L87 Difference]: Start difference. First operand 808 states and 856 transitions. Second operand 28 states. [2018-11-07 16:36:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:36:06,438 INFO L93 Difference]: Finished difference Result 2069 states and 2218 transitions. [2018-11-07 16:36:06,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-11-07 16:36:06,439 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 643 [2018-11-07 16:36:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:36:06,445 INFO L225 Difference]: With dead ends: 2069 [2018-11-07 16:36:06,446 INFO L226 Difference]: Without dead ends: 1484 [2018-11-07 16:36:06,453 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1390 GetRequests, 1262 SyntacticMatches, 7 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4503 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3045, Invalid=11961, Unknown=0, NotChecked=0, Total=15006 [2018-11-07 16:36:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2018-11-07 16:36:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 894. [2018-11-07 16:36:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2018-11-07 16:36:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 947 transitions. [2018-11-07 16:36:06,502 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 947 transitions. Word has length 643 [2018-11-07 16:36:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:36:06,502 INFO L480 AbstractCegarLoop]: Abstraction has 894 states and 947 transitions. [2018-11-07 16:36:06,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-07 16:36:06,503 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 947 transitions. [2018-11-07 16:36:06,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 710 [2018-11-07 16:36:06,509 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:36:06,509 INFO L375 BasicCegarLoop]: trace histogram [50, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:36:06,510 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:36:06,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:36:06,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1758994133, now seen corresponding path program 13 times [2018-11-07 16:36:06,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:36:06,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:36:06,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 16:36:06,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:36:06,512 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:36:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:36:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11701 backedges. 3726 proven. 414 refuted. 0 times theorem prover too weak. 7561 trivial. 0 not checked. [2018-11-07 16:36:07,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:36:07,746 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:36:07,747 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:36:07,747 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:36:07,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:36:07,747 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:36:07,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:36:07,760 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 16:36:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:36:07,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:36:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11701 backedges. 3726 proven. 414 refuted. 0 times theorem prover too weak. 7561 trivial. 0 not checked. [2018-11-07 16:36:08,540 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:36:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11701 backedges. 3726 proven. 414 refuted. 0 times theorem prover too weak. 7561 trivial. 0 not checked. [2018-11-07 16:36:09,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:36:09,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2018-11-07 16:36:09,061 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:36:09,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-07 16:36:09,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-07 16:36:09,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=635, Unknown=0, NotChecked=0, Total=1122 [2018-11-07 16:36:09,062 INFO L87 Difference]: Start difference. First operand 894 states and 947 transitions. Second operand 23 states. [2018-11-07 16:36:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:36:09,381 INFO L93 Difference]: Finished difference Result 1690 states and 1800 transitions. [2018-11-07 16:36:09,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 16:36:09,382 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 709 [2018-11-07 16:36:09,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:36:09,387 INFO L225 Difference]: With dead ends: 1690 [2018-11-07 16:36:09,387 INFO L226 Difference]: Without dead ends: 1034 [2018-11-07 16:36:09,389 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1430 GetRequests, 1398 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=487, Invalid=635, Unknown=0, NotChecked=0, Total=1122 [2018-11-07 16:36:09,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2018-11-07 16:36:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 969. [2018-11-07 16:36:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 969 states. [2018-11-07 16:36:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1027 transitions. [2018-11-07 16:36:09,435 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1027 transitions. Word has length 709 [2018-11-07 16:36:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:36:09,436 INFO L480 AbstractCegarLoop]: Abstraction has 969 states and 1027 transitions. [2018-11-07 16:36:09,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-07 16:36:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1027 transitions. [2018-11-07 16:36:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2018-11-07 16:36:09,443 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:36:09,443 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:36:09,443 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:36:09,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:36:09,444 INFO L82 PathProgramCache]: Analyzing trace with hash -780359094, now seen corresponding path program 14 times [2018-11-07 16:36:09,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:36:09,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:36:09,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:36:09,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:36:09,445 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:36:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:36:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14336 backedges. 4578 proven. 515 refuted. 0 times theorem prover too weak. 9243 trivial. 0 not checked. [2018-11-07 16:36:10,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:36:10,899 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:36:10,899 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:36:10,900 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:36:10,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:36:10,900 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:36:10,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 16:36:10,908 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 16:36:48,812 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-07 16:36:48,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:36:48,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:36:49,297 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-07 16:36:49,299 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-07 16:36:49,299 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-07 16:36:49,301 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-07 16:36:49,317 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-07 16:36:49,317 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2018-11-07 16:36:49,395 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2018-11-07 16:36:49,411 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:49,413 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 23 [2018-11-07 16:36:49,414 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-07 16:36:49,422 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-07 16:36:49,430 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-07 16:36:49,431 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2018-11-07 16:36:49,501 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2018-11-07 16:36:49,540 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:49,574 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 45 [2018-11-07 16:36:49,575 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-11-07 16:36:49,596 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-07 16:36:49,619 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-11-07 16:36:49,620 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:75 [2018-11-07 16:36:49,920 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-11-07 16:36:49,975 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2018-11-07 16:36:50,035 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:50,078 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 65 [2018-11-07 16:36:50,079 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2018-11-07 16:36:50,182 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-07 16:36:50,257 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 37 [2018-11-07 16:36:50,261 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:50,264 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2018-11-07 16:36:50,265 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-11-07 16:36:50,283 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-07 16:36:50,329 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2018-11-07 16:36:50,329 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:102, output treesize:94 [2018-11-07 16:36:50,833 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2018-11-07 16:36:50,858 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:50,861 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:50,862 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:50,869 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 67 [2018-11-07 16:36:50,869 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-07 16:36:50,887 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-07 16:36:50,937 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 53 [2018-11-07 16:36:50,943 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:50,944 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:50,946 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:50,948 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 67 [2018-11-07 16:36:50,949 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-11-07 16:36:50,967 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-07 16:36:51,002 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-11-07 16:36:51,003 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:125 [2018-11-07 16:36:52,244 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-11-07 16:36:52,262 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2018-11-07 16:36:52,294 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:52,315 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:52,336 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:52,364 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:52,389 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:36:52,463 INFO L303 Elim1Store]: Index analysis took 199 ms [2018-11-07 16:36:52,464 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2018-11-07 16:36:52,464 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-07 16:36:52,477 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-07 16:36:52,484 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-07 16:36:52,485 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:61, output treesize:3 [2018-11-07 16:36:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14336 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2018-11-07 16:36:56,727 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:37:08,166 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2018-11-07 16:37:08,168 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 48 [2018-11-07 16:37:08,171 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:08,173 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 63 [2018-11-07 16:37:08,177 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:08,276 INFO L303 Elim1Store]: Index analysis took 101 ms [2018-11-07 16:37:08,286 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 79 [2018-11-07 16:37:08,291 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:08,294 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 83 [2018-11-07 16:37:08,391 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:08,513 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2018-11-07 16:37:08,513 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2018-11-07 16:37:08,516 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:08,519 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 21 [2018-11-07 16:37:08,519 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-11-07 16:37:08,544 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-07 16:37:08,585 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:08,610 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 98 [2018-11-07 16:37:08,935 WARN L179 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2018-11-07 16:37:08,938 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-11-07 16:37:08,938 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-11-07 16:37:08,961 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:08,993 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:08,995 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:08,995 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:08,999 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:09,001 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:09,003 INFO L700 Elim1Store]: detected not equals via solver [2018-11-07 16:37:09,005 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 61 [2018-11-07 16:37:09,006 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-11-07 16:37:09,297 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:09,299 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:09,308 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:09,339 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 104 [2018-11-07 16:37:09,341 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 3 xjuncts. [2018-11-07 16:37:09,345 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:09,346 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:09,347 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:09,348 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:09,349 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2018-11-07 16:37:09,349 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-11-07 16:37:09,446 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:09,450 INFO L682 Elim1Store]: detected equality via solver [2018-11-07 16:37:09,470 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 81 [2018-11-07 16:37:09,472 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2018-11-07 16:37:09,562 INFO L267 ElimStorePlain]: Start of recursive call 9: 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2018-11-07 16:37:09,730 INFO L267 ElimStorePlain]: Start of recursive call 5: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2018-11-07 16:37:09,769 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2018-11-07 16:37:10,018 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2018-11-07 16:37:10,052 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2018-11-07 16:37:10,105 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 6 xjuncts. [2018-11-07 16:37:10,105 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:67, output treesize:146 [2018-11-07 16:37:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14336 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2018-11-07 16:37:11,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:37:11,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 20] total 50 [2018-11-07 16:37:11,759 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:37:11,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-07 16:37:11,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-07 16:37:11,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=2117, Unknown=6, NotChecked=0, Total=2450 [2018-11-07 16:37:11,761 INFO L87 Difference]: Start difference. First operand 969 states and 1027 transitions. Second operand 33 states. [2018-11-07 16:37:14,062 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2018-11-07 16:37:14,299 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2018-11-07 16:37:17,514 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2018-11-07 16:37:18,339 WARN L179 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2018-11-07 16:37:21,616 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2018-11-07 16:37:26,449 WARN L179 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2018-11-07 16:37:30,577 WARN L179 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2018-11-07 16:37:34,750 WARN L179 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-11-07 16:37:38,904 WARN L179 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-11-07 16:37:43,461 WARN L179 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-11-07 16:37:47,615 WARN L179 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-11-07 16:37:51,778 WARN L179 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-11-07 16:37:55,940 WARN L179 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-11-07 16:38:00,120 WARN L179 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 59 DAG size of output: 54 Received shutdown request... [2018-11-07 16:38:04,305 WARN L187 SmtUtils]: Removed 6 from assertion stack [2018-11-07 16:38:04,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-11-07 16:38:04,306 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 16:38:04,311 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 16:38:04,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:38:04 BoogieIcfgContainer [2018-11-07 16:38:04,311 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 16:38:04,312 INFO L168 Benchmark]: Toolchain (without parser) took 255257.38 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 329.1 MB. Max. memory is 7.1 GB. [2018-11-07 16:38:04,313 INFO L168 Benchmark]: CDTParser took 0.51 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 16:38:04,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 413.15 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-11-07 16:38:04,314 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 16:38:04,314 INFO L168 Benchmark]: Boogie Preprocessor took 75.71 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 16:38:04,314 INFO L168 Benchmark]: RCFGBuilder took 1132.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -767.4 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2018-11-07 16:38:04,315 INFO L168 Benchmark]: TraceAbstraction took 253585.47 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 2.2 GB in the beginning and 3.0 GB in the end (delta: -826.2 MB). Peak memory consumption was 335.1 MB. Max. memory is 7.1 GB. [2018-11-07 16:38:04,319 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 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 413.15 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.71 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 1132.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -767.4 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 253585.47 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 2.2 GB in the beginning and 3.0 GB in the end (delta: -826.2 MB). Peak memory consumption was 335.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (969states) and FLOYD_HOARE automaton (currently 82 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 59. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 142 locations, 1 error locations. TIMEOUT Result, 253.5s OverallTime, 18 OverallIterations, 55 TraceHistogramMax, 74.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2077 SDtfs, 22013 SDslu, 13115 SDs, 0 SdLazy, 5693 SolverSat, 1812 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.0s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 11923 GetRequests, 11256 SyntacticMatches, 22 SemanticMatches, 644 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13723 ImplicationChecksByTransitivity, 78.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=969occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.6s AbstIntTime, 3 AbstIntIterations, 2 AbstIntStrong, 0.9857751725398786 AbsIntWeakeningRatio, 0.32589285714285715 AbsIntAvgWeakeningVarsNumRemoved, 4.620535714285714 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 2039 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 132.3s SatisfiabilityAnalysisTime, 40.9s InterpolantComputationTime, 11621 NumberOfCodeBlocks, 10209 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 17187 ConstructedInterpolants, 677 QuantifiedInterpolants, 57198952 SizeOfPredicates, 52 NumberOfNonLiveVariables, 7170 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 46 InterpolantComputations, 5 PerfectInterpolantSequences, 159697/171873 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown