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/eca-rers2012/Problem15_label26_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:10:46,465 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:10:46,467 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:10:46,479 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:10:46,480 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:10:46,481 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:10:46,482 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:10:46,484 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:10:46,486 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:10:46,487 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:10:46,488 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:10:46,488 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:10:46,489 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:10:46,490 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:10:46,492 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:10:46,492 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:10:46,493 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:10:46,495 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:10:46,497 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:10:46,499 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:10:46,500 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:10:46,502 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:10:46,504 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 15:10:46,505 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 15:10:46,505 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 15:10:46,506 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 15:10:46,507 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 15:10:46,511 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 15:10:46,512 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 15:10:46,517 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 15:10:46,517 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 15:10:46,518 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 15:10:46,518 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:10:46,518 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:10:46,522 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:10:46,523 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:10:46,523 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 15:10:46,555 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:10:46,555 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:10:46,557 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:10:46,557 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:10:46,557 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:10:46,557 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:10:46,557 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:10:46,558 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:10:46,558 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:10:46,558 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:10:46,558 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:10:46,558 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:10:46,559 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:10:46,560 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:10:46,560 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:10:46,560 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:10:46,560 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:10:46,560 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:10:46,561 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:10:46,562 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:10:46,562 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:10:46,562 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:10:46,562 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:10:46,562 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:10:46,563 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:10:46,563 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:10:46,563 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:10:46,563 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:10:46,563 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:10:46,563 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:10:46,564 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:10:46,564 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:10:46,564 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:10:46,564 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:10:46,618 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:10:46,633 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:10:46,637 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:10:46,638 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:10:46,639 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:10:46,639 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label26_true-unreach-call.c [2018-11-07 15:10:46,704 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966b38707/695398962f1f43e8961bde07c56c9ada/FLAG03747622a [2018-11-07 15:10:47,411 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:10:47,412 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label26_true-unreach-call.c [2018-11-07 15:10:47,437 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966b38707/695398962f1f43e8961bde07c56c9ada/FLAG03747622a [2018-11-07 15:10:47,458 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966b38707/695398962f1f43e8961bde07c56c9ada [2018-11-07 15:10:47,470 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:10:47,472 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:10:47,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:10:47,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:10:47,479 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:10:47,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:10:47" (1/1) ... [2018-11-07 15:10:47,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f02fcd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:47, skipping insertion in model container [2018-11-07 15:10:47,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:10:47" (1/1) ... [2018-11-07 15:10:47,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:10:47,613 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:10:48,483 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:10:48,488 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:10:48,787 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:10:48,811 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:10:48,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:48 WrapperNode [2018-11-07 15:10:48,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:10:48,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:10:48,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:10:48,814 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:10:48,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:48" (1/1) ... [2018-11-07 15:10:49,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:48" (1/1) ... [2018-11-07 15:10:49,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:10:49,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:10:49,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:10:49,097 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:10:49,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:48" (1/1) ... [2018-11-07 15:10:49,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:48" (1/1) ... [2018-11-07 15:10:49,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:48" (1/1) ... [2018-11-07 15:10:49,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:48" (1/1) ... [2018-11-07 15:10:49,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:48" (1/1) ... [2018-11-07 15:10:49,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:48" (1/1) ... [2018-11-07 15:10:49,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:48" (1/1) ... [2018-11-07 15:10:49,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:10:49,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:10:49,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:10:49,237 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:10:49,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:48" (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 15:10:49,307 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:10:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:10:49,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:10:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:10:49,308 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:10:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:10:49,308 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:10:49,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:10:49,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:10:49,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:10:49,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:10:56,407 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:10:56,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:10:56 BoogieIcfgContainer [2018-11-07 15:10:56,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:10:56,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:10:56,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:10:56,415 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:10:56,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:10:47" (1/3) ... [2018-11-07 15:10:56,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55dc43fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:10:56, skipping insertion in model container [2018-11-07 15:10:56,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:48" (2/3) ... [2018-11-07 15:10:56,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55dc43fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:10:56, skipping insertion in model container [2018-11-07 15:10:56,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:10:56" (3/3) ... [2018-11-07 15:10:56,420 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label26_true-unreach-call.c [2018-11-07 15:10:56,431 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:10:56,443 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:10:56,462 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:10:56,511 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:10:56,511 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:10:56,511 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:10:56,511 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:10:56,512 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:10:56,512 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:10:56,512 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:10:56,512 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:10:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-11-07 15:10:56,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-07 15:10:56,558 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:10:56,559 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] [2018-11-07 15:10:56,562 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:10:56,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:56,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1626414812, now seen corresponding path program 1 times [2018-11-07 15:10:56,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:10:56,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:56,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:56,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:56,619 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:10:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:57,089 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-11-07 15:10:57,171 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 15:10:57,176 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:10:57,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:10:57,176 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:10:57,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:10:57,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:10:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:10:57,206 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-11-07 15:11:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:11:04,355 INFO L93 Difference]: Finished difference Result 1558 states and 2849 transitions. [2018-11-07 15:11:04,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:11:04,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2018-11-07 15:11:04,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:11:04,384 INFO L225 Difference]: With dead ends: 1558 [2018-11-07 15:11:04,385 INFO L226 Difference]: Without dead ends: 1114 [2018-11-07 15:11:04,397 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:11:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2018-11-07 15:11:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1091. [2018-11-07 15:11:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2018-11-07 15:11:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1853 transitions. [2018-11-07 15:11:04,538 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1853 transitions. Word has length 60 [2018-11-07 15:11:04,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:11:04,541 INFO L480 AbstractCegarLoop]: Abstraction has 1091 states and 1853 transitions. [2018-11-07 15:11:04,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:11:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1853 transitions. [2018-11-07 15:11:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-07 15:11:04,563 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:11:04,563 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:11:04,564 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:11:04,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:04,564 INFO L82 PathProgramCache]: Analyzing trace with hash -30432942, now seen corresponding path program 1 times [2018-11-07 15:11:04,565 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:11:04,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:04,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:11:04,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:04,569 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:11:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:11:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:11:04,982 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:11:04,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:11:04,983 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:11:04,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:11:04,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:11:04,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:11:04,986 INFO L87 Difference]: Start difference. First operand 1091 states and 1853 transitions. Second operand 5 states. [2018-11-07 15:11:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:11:10,258 INFO L93 Difference]: Finished difference Result 3243 states and 5585 transitions. [2018-11-07 15:11:10,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 15:11:10,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2018-11-07 15:11:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:11:10,283 INFO L225 Difference]: With dead ends: 3243 [2018-11-07 15:11:10,283 INFO L226 Difference]: Without dead ends: 2158 [2018-11-07 15:11:10,291 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:11:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2018-11-07 15:11:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 2114. [2018-11-07 15:11:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2018-11-07 15:11:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3176 transitions. [2018-11-07 15:11:10,408 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3176 transitions. Word has length 133 [2018-11-07 15:11:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:11:10,408 INFO L480 AbstractCegarLoop]: Abstraction has 2114 states and 3176 transitions. [2018-11-07 15:11:10,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:11:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3176 transitions. [2018-11-07 15:11:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-11-07 15:11:10,416 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:11:10,416 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:11:10,416 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:11:10,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:10,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1329379774, now seen corresponding path program 1 times [2018-11-07 15:11:10,417 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:11:10,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:10,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:11:10,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:10,420 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:11:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:11:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:11:10,709 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:11:10,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:11:10,709 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:11:10,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:11:10,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:11:10,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:11:10,711 INFO L87 Difference]: Start difference. First operand 2114 states and 3176 transitions. Second operand 4 states. [2018-11-07 15:11:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:11:17,130 INFO L93 Difference]: Finished difference Result 7960 states and 12495 transitions. [2018-11-07 15:11:17,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:11:17,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2018-11-07 15:11:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:11:17,183 INFO L225 Difference]: With dead ends: 7960 [2018-11-07 15:11:17,183 INFO L226 Difference]: Without dead ends: 5852 [2018-11-07 15:11:17,210 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:11:17,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2018-11-07 15:11:17,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 5847. [2018-11-07 15:11:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5847 states. [2018-11-07 15:11:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5847 states to 5847 states and 8247 transitions. [2018-11-07 15:11:17,431 INFO L78 Accepts]: Start accepts. Automaton has 5847 states and 8247 transitions. Word has length 141 [2018-11-07 15:11:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:11:17,432 INFO L480 AbstractCegarLoop]: Abstraction has 5847 states and 8247 transitions. [2018-11-07 15:11:17,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:11:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 5847 states and 8247 transitions. [2018-11-07 15:11:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-11-07 15:11:17,438 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:11:17,438 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:11:17,438 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:11:17,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:17,439 INFO L82 PathProgramCache]: Analyzing trace with hash -386539338, now seen corresponding path program 1 times [2018-11-07 15:11:17,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:11:17,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:17,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:11:17,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:17,440 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:11:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:11:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:11:17,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:11:17,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:11:17,737 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:11:17,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:11:17,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:11:17,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:11:17,738 INFO L87 Difference]: Start difference. First operand 5847 states and 8247 transitions. Second operand 6 states. [2018-11-07 15:11:21,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:11:21,704 INFO L93 Difference]: Finished difference Result 13531 states and 18782 transitions. [2018-11-07 15:11:21,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:11:21,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2018-11-07 15:11:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:11:21,744 INFO L225 Difference]: With dead ends: 13531 [2018-11-07 15:11:21,745 INFO L226 Difference]: Without dead ends: 7690 [2018-11-07 15:11:21,785 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:11:21,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7690 states. [2018-11-07 15:11:21,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7690 to 7626. [2018-11-07 15:11:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7626 states. [2018-11-07 15:11:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7626 states to 7626 states and 9939 transitions. [2018-11-07 15:11:21,999 INFO L78 Accepts]: Start accepts. Automaton has 7626 states and 9939 transitions. Word has length 160 [2018-11-07 15:11:21,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:11:21,999 INFO L480 AbstractCegarLoop]: Abstraction has 7626 states and 9939 transitions. [2018-11-07 15:11:22,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:11:22,000 INFO L276 IsEmpty]: Start isEmpty. Operand 7626 states and 9939 transitions. [2018-11-07 15:11:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-11-07 15:11:22,010 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:11:22,011 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:11:22,011 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:11:22,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:22,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1240653666, now seen corresponding path program 1 times [2018-11-07 15:11:22,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:11:22,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:22,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:11:22,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:22,013 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:11:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:11:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 15:11:22,515 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:11:22,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:11:22,515 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:11:22,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:11:22,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:11:22,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:11:22,516 INFO L87 Difference]: Start difference. First operand 7626 states and 9939 transitions. Second operand 4 states. [2018-11-07 15:11:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:11:26,451 INFO L93 Difference]: Finished difference Result 24545 states and 32869 transitions. [2018-11-07 15:11:26,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:11:26,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 215 [2018-11-07 15:11:26,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:11:26,538 INFO L225 Difference]: With dead ends: 24545 [2018-11-07 15:11:26,538 INFO L226 Difference]: Without dead ends: 16925 [2018-11-07 15:11:26,592 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:11:26,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16925 states. [2018-11-07 15:11:26,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16925 to 16303. [2018-11-07 15:11:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16303 states. [2018-11-07 15:11:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 20254 transitions. [2018-11-07 15:11:26,976 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 20254 transitions. Word has length 215 [2018-11-07 15:11:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:11:26,977 INFO L480 AbstractCegarLoop]: Abstraction has 16303 states and 20254 transitions. [2018-11-07 15:11:26,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:11:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 20254 transitions. [2018-11-07 15:11:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-11-07 15:11:26,994 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:11:26,995 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:11:26,995 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:11:26,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:26,996 INFO L82 PathProgramCache]: Analyzing trace with hash -624386788, now seen corresponding path program 1 times [2018-11-07 15:11:26,996 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:11:26,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:26,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:11:26,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:26,998 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:11:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:11:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-11-07 15:11:27,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:11:27,625 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:11:27,626 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 242 with the following transitions: [2018-11-07 15:11:27,628 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [453], [455], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [714], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 15:11:27,682 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:11:27,682 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:11:28,206 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:11:28,209 INFO L272 AbstractInterpreter]: Visited 105 different actions 105 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:11:28,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:28,261 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:11:28,774 INFO L227 lantSequenceWeakener]: Weakened 232 states. On average, predicates are now at 78.08% of their original sizes. [2018-11-07 15:11:28,774 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:11:29,257 INFO L415 sIntCurrentIteration]: We unified 240 AI predicates to 240 [2018-11-07 15:11:29,257 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:11:29,261 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:11:29,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2018-11-07 15:11:29,262 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:11:29,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 15:11:29,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 15:11:29,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:11:29,263 INFO L87 Difference]: Start difference. First operand 16303 states and 20254 transitions. Second operand 8 states. [2018-11-07 15:11:32,703 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown