java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label04_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 11:47:00,602 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 11:47:00,604 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 11:47:00,616 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 11:47:00,617 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 11:47:00,618 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 11:47:00,619 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 11:47:00,621 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 11:47:00,623 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 11:47:00,624 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 11:47:00,625 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 11:47:00,625 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 11:47:00,626 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 11:47:00,627 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 11:47:00,628 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 11:47:00,629 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 11:47:00,630 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 11:47:00,632 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 11:47:00,634 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 11:47:00,636 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 11:47:00,637 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 11:47:00,639 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 11:47:00,641 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 11:47:00,642 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 11:47:00,642 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 11:47:00,643 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 11:47:00,644 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 11:47:00,645 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 11:47:00,646 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 11:47:00,647 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 11:47:00,648 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 11:47:00,648 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 11:47:00,649 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 11:47:00,649 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 11:47:00,650 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 11:47:00,651 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 11:47:00,651 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-18 11:47:00,674 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 11:47:00,676 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 11:47:00,677 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 11:47:00,677 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 11:47:00,677 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 11:47:00,679 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 11:47:00,679 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 11:47:00,680 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 11:47:00,680 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 11:47:00,680 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 11:47:00,680 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 11:47:00,680 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 11:47:00,681 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 11:47:00,682 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 11:47:00,682 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 11:47:00,682 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 11:47:00,683 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 11:47:00,683 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 11:47:00,683 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 11:47:00,683 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 11:47:00,683 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 11:47:00,684 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 11:47:00,684 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 11:47:00,684 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 11:47:00,684 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:47:00,686 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 11:47:00,686 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 11:47:00,686 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 11:47:00,686 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 11:47:00,687 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 11:47:00,687 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 11:47:00,687 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 11:47:00,687 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 11:47:00,688 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 11:47:00,737 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 11:47:00,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 11:47:00,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 11:47:00,755 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 11:47:00,756 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 11:47:00,756 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label04_true-unreach-call_false-termination.c [2018-09-18 11:47:01,150 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb98f598b/65c81d150f6c4cbdbc88ac46a2a797bd/FLAG2aa6995b5 [2018-09-18 11:47:01,463 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 11:47:01,464 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label04_true-unreach-call_false-termination.c [2018-09-18 11:47:01,484 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb98f598b/65c81d150f6c4cbdbc88ac46a2a797bd/FLAG2aa6995b5 [2018-09-18 11:47:01,510 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb98f598b/65c81d150f6c4cbdbc88ac46a2a797bd [2018-09-18 11:47:01,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 11:47:01,528 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 11:47:01,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 11:47:01,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 11:47:01,540 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 11:47:01,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:47:01" (1/1) ... [2018-09-18 11:47:01,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17281938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:01, skipping insertion in model container [2018-09-18 11:47:01,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:47:01" (1/1) ... [2018-09-18 11:47:01,559 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 11:47:02,085 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:47:02,104 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 11:47:02,280 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:47:02,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:02 WrapperNode [2018-09-18 11:47:02,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 11:47:02,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 11:47:02,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 11:47:02,328 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 11:47:02,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:02" (1/1) ... [2018-09-18 11:47:02,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:02" (1/1) ... [2018-09-18 11:47:02,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 11:47:02,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 11:47:02,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 11:47:02,474 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 11:47:02,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:02" (1/1) ... [2018-09-18 11:47:02,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:02" (1/1) ... [2018-09-18 11:47:02,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:02" (1/1) ... [2018-09-18 11:47:02,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:02" (1/1) ... [2018-09-18 11:47:02,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:02" (1/1) ... [2018-09-18 11:47:02,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:02" (1/1) ... [2018-09-18 11:47:02,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:02" (1/1) ... [2018-09-18 11:47:02,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 11:47:02,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 11:47:02,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 11:47:02,733 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 11:47:02,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:47:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 11:47:02,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 11:47:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 11:47:02,813 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 11:47:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 11:47:02,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 11:47:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 11:47:02,813 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 11:47:06,616 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 11:47:06,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:47:06 BoogieIcfgContainer [2018-09-18 11:47:06,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 11:47:06,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 11:47:06,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 11:47:06,622 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 11:47:06,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 11:47:01" (1/3) ... [2018-09-18 11:47:06,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e666db6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:47:06, skipping insertion in model container [2018-09-18 11:47:06,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:47:02" (2/3) ... [2018-09-18 11:47:06,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e666db6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:47:06, skipping insertion in model container [2018-09-18 11:47:06,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:47:06" (3/3) ... [2018-09-18 11:47:06,627 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label04_true-unreach-call_false-termination.c [2018-09-18 11:47:06,637 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 11:47:06,647 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 11:47:06,703 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 11:47:06,703 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 11:47:06,704 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 11:47:06,704 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 11:47:06,704 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 11:47:06,704 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 11:47:06,704 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 11:47:06,705 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 11:47:06,705 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 11:47:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-09-18 11:47:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-18 11:47:06,745 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:06,746 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:47:06,748 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:06,754 INFO L82 PathProgramCache]: Analyzing trace with hash -670280511, now seen corresponding path program 1 times [2018-09-18 11:47:06,757 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:06,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:06,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:06,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:06,810 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:07,199 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:47:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:47:07,270 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:47:07,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:47:07,271 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:47:07,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:47:07,293 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:47:07,294 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:47:07,297 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-09-18 11:47:09,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:09,006 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-09-18 11:47:09,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:47:09,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2018-09-18 11:47:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:09,031 INFO L225 Difference]: With dead ends: 691 [2018-09-18 11:47:09,031 INFO L226 Difference]: Without dead ends: 434 [2018-09-18 11:47:09,040 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:47:09,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-09-18 11:47:09,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-09-18 11:47:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-09-18 11:47:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-09-18 11:47:09,135 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 59 [2018-09-18 11:47:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:09,136 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-09-18 11:47:09,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:47:09,136 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-09-18 11:47:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-18 11:47:09,144 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:09,144 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:47:09,145 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:09,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2036233980, now seen corresponding path program 1 times [2018-09-18 11:47:09,145 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:09,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:09,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:09,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:09,147 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:47:09,479 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:47:09,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 11:47:09,480 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:47:09,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 11:47:09,482 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 11:47:09,483 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 11:47:09,483 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-09-18 11:47:12,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:12,977 INFO L93 Difference]: Finished difference Result 1588 states and 2935 transitions. [2018-09-18 11:47:12,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:47:12,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2018-09-18 11:47:12,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:12,992 INFO L225 Difference]: With dead ends: 1588 [2018-09-18 11:47:12,992 INFO L226 Difference]: Without dead ends: 1160 [2018-09-18 11:47:12,997 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 [2018-09-18 11:47:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2018-09-18 11:47:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1153. [2018-09-18 11:47:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-09-18 11:47:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1887 transitions. [2018-09-18 11:47:13,063 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1887 transitions. Word has length 129 [2018-09-18 11:47:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:13,063 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 1887 transitions. [2018-09-18 11:47:13,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 11:47:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1887 transitions. [2018-09-18 11:47:13,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-18 11:47:13,076 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:13,076 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:47:13,077 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:13,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1284385993, now seen corresponding path program 1 times [2018-09-18 11:47:13,077 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:13,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:13,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:13,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:13,081 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:13,315 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:47:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:47:13,421 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:47:13,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-18 11:47:13,422 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:47:13,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:47:13,423 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:47:13,423 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-18 11:47:13,423 INFO L87 Difference]: Start difference. First operand 1153 states and 1887 transitions. Second operand 5 states. [2018-09-18 11:47:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:16,109 INFO L93 Difference]: Finished difference Result 2716 states and 4601 transitions. [2018-09-18 11:47:16,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:47:16,110 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2018-09-18 11:47:16,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:16,129 INFO L225 Difference]: With dead ends: 2716 [2018-09-18 11:47:16,129 INFO L226 Difference]: Without dead ends: 1569 [2018-09-18 11:47:16,134 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-18 11:47:16,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2018-09-18 11:47:16,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1538. [2018-09-18 11:47:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2018-09-18 11:47:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2356 transitions. [2018-09-18 11:47:16,210 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2356 transitions. Word has length 130 [2018-09-18 11:47:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:16,211 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 2356 transitions. [2018-09-18 11:47:16,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:47:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2356 transitions. [2018-09-18 11:47:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-18 11:47:16,215 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:16,217 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:47:16,217 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:16,217 INFO L82 PathProgramCache]: Analyzing trace with hash 516676699, now seen corresponding path program 1 times [2018-09-18 11:47:16,217 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:16,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:16,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:16,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:16,220 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:47:16,391 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:47:16,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-18 11:47:16,392 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:47:16,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:47:16,393 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:47:16,393 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-18 11:47:16,393 INFO L87 Difference]: Start difference. First operand 1538 states and 2356 transitions. Second operand 5 states. [2018-09-18 11:47:19,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:19,186 INFO L93 Difference]: Finished difference Result 4906 states and 7504 transitions. [2018-09-18 11:47:19,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 11:47:19,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2018-09-18 11:47:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:19,214 INFO L225 Difference]: With dead ends: 4906 [2018-09-18 11:47:19,214 INFO L226 Difference]: Without dead ends: 3374 [2018-09-18 11:47:19,227 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-18 11:47:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2018-09-18 11:47:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 3263. [2018-09-18 11:47:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3263 states. [2018-09-18 11:47:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 4437 transitions. [2018-09-18 11:47:19,344 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 4437 transitions. Word has length 132 [2018-09-18 11:47:19,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:19,344 INFO L480 AbstractCegarLoop]: Abstraction has 3263 states and 4437 transitions. [2018-09-18 11:47:19,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:47:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 4437 transitions. [2018-09-18 11:47:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-18 11:47:19,351 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:19,351 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:47:19,352 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:19,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1486188283, now seen corresponding path program 1 times [2018-09-18 11:47:19,352 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:19,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:19,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:19,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:19,354 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:47:19,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:47:19,987 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:47:19,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:19,998 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:47:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:20,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:47:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-09-18 11:47:20,595 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:47:20,845 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-09-18 11:47:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:47:21,763 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:47:21,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-09-18 11:47:21,764 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:47:21,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:47:21,765 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:47:21,765 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2018-09-18 11:47:21,765 INFO L87 Difference]: Start difference. First operand 3263 states and 4437 transitions. Second operand 5 states. [2018-09-18 11:47:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:24,758 INFO L93 Difference]: Finished difference Result 8194 states and 11071 transitions. [2018-09-18 11:47:24,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 11:47:24,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2018-09-18 11:47:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:24,786 INFO L225 Difference]: With dead ends: 8194 [2018-09-18 11:47:24,786 INFO L226 Difference]: Without dead ends: 4937 [2018-09-18 11:47:24,801 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 429 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-09-18 11:47:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2018-09-18 11:47:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 4239. [2018-09-18 11:47:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4239 states. [2018-09-18 11:47:24,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 5642 transitions. [2018-09-18 11:47:24,919 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 5642 transitions. Word has length 217 [2018-09-18 11:47:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:24,920 INFO L480 AbstractCegarLoop]: Abstraction has 4239 states and 5642 transitions. [2018-09-18 11:47:24,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:47:24,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 5642 transitions. [2018-09-18 11:47:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-18 11:47:24,926 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:24,927 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:47:24,927 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:24,927 INFO L82 PathProgramCache]: Analyzing trace with hash 597684751, now seen corresponding path program 1 times [2018-09-18 11:47:24,927 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:24,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:24,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:24,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:24,930 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 115 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:47:25,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:47:25,574 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:47:25,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:25,582 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:47:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:25,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:47:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-09-18 11:47:25,883 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:47:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:47:26,320 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:47:26,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 14 [2018-09-18 11:47:26,321 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:47:26,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:47:26,323 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:47:26,323 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-09-18 11:47:26,324 INFO L87 Difference]: Start difference. First operand 4239 states and 5642 transitions. Second operand 5 states. [2018-09-18 11:47:29,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:29,521 INFO L93 Difference]: Finished difference Result 12329 states and 16826 transitions. [2018-09-18 11:47:29,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 11:47:29,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2018-09-18 11:47:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:29,564 INFO L225 Difference]: With dead ends: 12329 [2018-09-18 11:47:29,564 INFO L226 Difference]: Without dead ends: 8096 [2018-09-18 11:47:29,593 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 481 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-09-18 11:47:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2018-09-18 11:47:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 8020. [2018-09-18 11:47:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8020 states. [2018-09-18 11:47:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8020 states to 8020 states and 10439 transitions. [2018-09-18 11:47:29,779 INFO L78 Accepts]: Start accepts. Automaton has 8020 states and 10439 transitions. Word has length 243 [2018-09-18 11:47:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:29,779 INFO L480 AbstractCegarLoop]: Abstraction has 8020 states and 10439 transitions. [2018-09-18 11:47:29,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:47:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 8020 states and 10439 transitions. [2018-09-18 11:47:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-18 11:47:29,796 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:29,796 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:47:29,797 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:29,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1576427027, now seen corresponding path program 1 times [2018-09-18 11:47:29,797 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:29,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:29,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:29,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:29,798 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:30,276 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-18 11:47:30,461 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-18 11:47:30,701 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-18 11:47:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 243 proven. 140 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:47:31,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:47:31,327 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-18 11:47:31,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:31,336 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:47:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:31,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:47:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 283 proven. 52 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-09-18 11:47:31,721 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:47:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 166 proven. 217 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:47:32,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:47:32,410 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:47:32,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:32,426 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:47:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:32,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:47:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 283 proven. 52 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-09-18 11:47:33,069 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:47:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 166 proven. 217 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:47:33,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:47:33,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-09-18 11:47:33,716 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:47:33,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-18 11:47:33,717 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-18 11:47:33,718 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2018-09-18 11:47:33,718 INFO L87 Difference]: Start difference. First operand 8020 states and 10439 transitions. Second operand 15 states. [2018-09-18 11:47:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:38,653 INFO L93 Difference]: Finished difference Result 16390 states and 21513 transitions. [2018-09-18 11:47:38,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-18 11:47:38,653 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 302 [2018-09-18 11:47:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:38,689 INFO L225 Difference]: With dead ends: 16390 [2018-09-18 11:47:38,689 INFO L226 Difference]: Without dead ends: 8159 [2018-09-18 11:47:38,720 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1251 GetRequests, 1207 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2018-09-18 11:47:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8159 states. [2018-09-18 11:47:38,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8159 to 7209. [2018-09-18 11:47:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7209 states. [2018-09-18 11:47:38,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7209 states to 7209 states and 8756 transitions. [2018-09-18 11:47:38,885 INFO L78 Accepts]: Start accepts. Automaton has 7209 states and 8756 transitions. Word has length 302 [2018-09-18 11:47:38,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:38,885 INFO L480 AbstractCegarLoop]: Abstraction has 7209 states and 8756 transitions. [2018-09-18 11:47:38,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-18 11:47:38,885 INFO L276 IsEmpty]: Start isEmpty. Operand 7209 states and 8756 transitions. [2018-09-18 11:47:38,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-18 11:47:38,894 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:38,895 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:47:38,895 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:38,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1143820971, now seen corresponding path program 1 times [2018-09-18 11:47:38,896 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:38,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:38,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:38,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:38,897 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:39,311 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-18 11:47:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 363 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:47:40,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:47:40,101 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-18 11:47:40,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:40,109 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:47:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:40,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:47:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-18 11:47:40,321 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:47:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-18 11:47:40,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:47:40,608 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:47:40,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:40,624 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:47:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:40,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:47:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 301 proven. 6 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-18 11:47:40,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:47:41,090 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2018-09-18 11:47:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-18 11:47:41,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:47:41,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 16 [2018-09-18 11:47:41,508 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:47:41,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-18 11:47:41,509 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-18 11:47:41,509 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-09-18 11:47:41,509 INFO L87 Difference]: Start difference. First operand 7209 states and 8756 transitions. Second operand 14 states. [2018-09-18 11:47:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:48,281 INFO L93 Difference]: Finished difference Result 17939 states and 22934 transitions. [2018-09-18 11:47:48,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-18 11:47:48,281 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 354 [2018-09-18 11:47:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:48,326 INFO L225 Difference]: With dead ends: 17939 [2018-09-18 11:47:48,326 INFO L226 Difference]: Without dead ends: 10736 [2018-09-18 11:47:48,357 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1486 GetRequests, 1440 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2018-09-18 11:47:48,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10736 states. [2018-09-18 11:47:48,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10736 to 10496. [2018-09-18 11:47:48,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10496 states. [2018-09-18 11:47:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10496 states to 10496 states and 12389 transitions. [2018-09-18 11:47:48,586 INFO L78 Accepts]: Start accepts. Automaton has 10496 states and 12389 transitions. Word has length 354 [2018-09-18 11:47:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:48,587 INFO L480 AbstractCegarLoop]: Abstraction has 10496 states and 12389 transitions. [2018-09-18 11:47:48,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-18 11:47:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 10496 states and 12389 transitions. [2018-09-18 11:47:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-09-18 11:47:48,598 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:48,599 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2018-09-18 11:47:48,599 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:48,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1579032322, now seen corresponding path program 1 times [2018-09-18 11:47:48,599 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:48,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:48,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:48,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:48,601 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-09-18 11:47:49,098 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:47:49,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:47:49,099 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:47:49,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:47:49,099 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:47:49,099 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:47:49,100 INFO L87 Difference]: Start difference. First operand 10496 states and 12389 transitions. Second operand 3 states. [2018-09-18 11:47:51,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:51,306 INFO L93 Difference]: Finished difference Result 24373 states and 30079 transitions. [2018-09-18 11:47:51,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:47:51,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 365 [2018-09-18 11:47:51,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:51,366 INFO L225 Difference]: With dead ends: 24373 [2018-09-18 11:47:51,366 INFO L226 Difference]: Without dead ends: 13883 [2018-09-18 11:47:51,413 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:47:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13883 states. [2018-09-18 11:47:51,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13883 to 13869. [2018-09-18 11:47:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13869 states. [2018-09-18 11:47:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13869 states to 13869 states and 16425 transitions. [2018-09-18 11:47:51,706 INFO L78 Accepts]: Start accepts. Automaton has 13869 states and 16425 transitions. Word has length 365 [2018-09-18 11:47:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:51,707 INFO L480 AbstractCegarLoop]: Abstraction has 13869 states and 16425 transitions. [2018-09-18 11:47:51,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:47:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 13869 states and 16425 transitions. [2018-09-18 11:47:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2018-09-18 11:47:51,749 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:51,750 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:47:51,750 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:51,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2088360157, now seen corresponding path program 1 times [2018-09-18 11:47:51,752 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:51,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:51,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:51,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:51,753 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-18 11:47:52,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:47:52,529 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:47:52,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:52,544 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:47:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:52,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:47:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-18 11:47:52,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:47:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-18 11:47:53,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:47:53,396 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:47:53,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:53,413 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:47:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:53,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:47:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-18 11:47:53,855 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:47:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-18 11:47:54,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:47:54,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-18 11:47:54,616 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:47:54,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 11:47:54,617 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 11:47:54,618 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-18 11:47:54,618 INFO L87 Difference]: Start difference. First operand 13869 states and 16425 transitions. Second operand 7 states. [2018-09-18 11:47:57,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:47:57,547 INFO L93 Difference]: Finished difference Result 34559 states and 49055 transitions. [2018-09-18 11:47:57,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-18 11:47:57,548 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 513 [2018-09-18 11:47:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:47:57,740 INFO L225 Difference]: With dead ends: 34559 [2018-09-18 11:47:57,740 INFO L226 Difference]: Without dead ends: 20696 [2018-09-18 11:47:57,870 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2068 GetRequests, 2053 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-18 11:47:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20696 states. [2018-09-18 11:47:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20696 to 20093. [2018-09-18 11:47:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20093 states. [2018-09-18 11:47:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20093 states to 20093 states and 25289 transitions. [2018-09-18 11:47:58,794 INFO L78 Accepts]: Start accepts. Automaton has 20093 states and 25289 transitions. Word has length 513 [2018-09-18 11:47:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:47:58,795 INFO L480 AbstractCegarLoop]: Abstraction has 20093 states and 25289 transitions. [2018-09-18 11:47:58,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 11:47:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 20093 states and 25289 transitions. [2018-09-18 11:47:58,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2018-09-18 11:47:58,833 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:47:58,833 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:47:58,834 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:47:58,834 INFO L82 PathProgramCache]: Analyzing trace with hash -686063236, now seen corresponding path program 1 times [2018-09-18 11:47:58,834 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:47:58,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:58,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:58,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:47:58,835 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:47:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:47:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 564 proven. 369 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-18 11:47:59,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:47:59,970 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-18 11:47:59,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:47:59,977 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:00,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 759 proven. 2 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2018-09-18 11:48:00,399 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:00,665 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-18 11:48:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 531 proven. 73 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2018-09-18 11:48:01,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:01,233 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:48:01,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:01,250 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:01,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 605 proven. 156 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2018-09-18 11:48:02,063 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 296 proven. 513 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-18 11:48:02,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:48:02,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-09-18 11:48:02,819 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:48:02,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 11:48:02,820 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 11:48:02,820 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-09-18 11:48:02,820 INFO L87 Difference]: Start difference. First operand 20093 states and 25289 transitions. Second operand 13 states. [2018-09-18 11:48:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:48:06,691 INFO L93 Difference]: Finished difference Result 40641 states and 54128 transitions. [2018-09-18 11:48:06,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-18 11:48:06,692 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 523 [2018-09-18 11:48:06,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:48:06,837 INFO L225 Difference]: With dead ends: 40641 [2018-09-18 11:48:06,837 INFO L226 Difference]: Without dead ends: 20335 [2018-09-18 11:48:06,952 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2120 GetRequests, 2082 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2018-09-18 11:48:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20335 states. [2018-09-18 11:48:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20335 to 19819. [2018-09-18 11:48:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19819 states. [2018-09-18 11:48:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19819 states to 19819 states and 24221 transitions. [2018-09-18 11:48:07,634 INFO L78 Accepts]: Start accepts. Automaton has 19819 states and 24221 transitions. Word has length 523 [2018-09-18 11:48:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:48:07,635 INFO L480 AbstractCegarLoop]: Abstraction has 19819 states and 24221 transitions. [2018-09-18 11:48:07,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-18 11:48:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 19819 states and 24221 transitions. [2018-09-18 11:48:07,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2018-09-18 11:48:07,679 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:48:07,679 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:48:07,679 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:48:07,680 INFO L82 PathProgramCache]: Analyzing trace with hash -185454448, now seen corresponding path program 1 times [2018-09-18 11:48:07,680 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:48:07,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:07,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:07,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:07,681 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:48:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:08,109 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-18 11:48:08,333 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-09-18 11:48:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 551 proven. 519 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-18 11:48:09,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:09,203 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-18 11:48:09,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:09,211 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:09,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 759 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-09-18 11:48:09,761 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 531 proven. 73 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2018-09-18 11:48:10,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:10,387 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:48:10,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:10,403 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:10,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 752 proven. 13 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2018-09-18 11:48:11,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:11,453 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-18 11:48:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 278 proven. 531 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-09-18 11:48:12,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:48:12,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5, 8, 8] total 30 [2018-09-18 11:48:12,619 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:48:12,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-18 11:48:12,621 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-18 11:48:12,621 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2018-09-18 11:48:12,621 INFO L87 Difference]: Start difference. First operand 19819 states and 24221 transitions. Second operand 21 states. [2018-09-18 11:48:20,912 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2018-09-18 11:48:22,337 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2018-09-18 11:48:23,477 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-09-18 11:48:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:48:25,379 INFO L93 Difference]: Finished difference Result 38744 states and 49125 transitions. [2018-09-18 11:48:25,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-18 11:48:25,380 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 549 [2018-09-18 11:48:25,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:48:25,454 INFO L225 Difference]: With dead ends: 38744 [2018-09-18 11:48:25,454 INFO L226 Difference]: Without dead ends: 18931 [2018-09-18 11:48:25,564 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2312 GetRequests, 2225 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1347, Invalid=5793, Unknown=0, NotChecked=0, Total=7140 [2018-09-18 11:48:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18931 states. [2018-09-18 11:48:25,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18931 to 17871. [2018-09-18 11:48:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17871 states. [2018-09-18 11:48:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17871 states to 17871 states and 20643 transitions. [2018-09-18 11:48:25,934 INFO L78 Accepts]: Start accepts. Automaton has 17871 states and 20643 transitions. Word has length 549 [2018-09-18 11:48:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:48:25,935 INFO L480 AbstractCegarLoop]: Abstraction has 17871 states and 20643 transitions. [2018-09-18 11:48:25,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-18 11:48:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 17871 states and 20643 transitions. [2018-09-18 11:48:25,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2018-09-18 11:48:25,943 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:48:25,944 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:48:25,944 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:48:25,945 INFO L82 PathProgramCache]: Analyzing trace with hash 735915075, now seen corresponding path program 1 times [2018-09-18 11:48:25,945 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:48:25,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:25,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:25,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:25,946 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:48:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:26,351 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-18 11:48:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 774 proven. 343 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-09-18 11:48:27,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:27,377 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-18 11:48:27,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:27,384 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:27,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 563 proven. 2 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-09-18 11:48:28,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 563 proven. 2 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-09-18 11:48:28,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:28,793 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:48:28,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:28,808 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:29,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 565 proven. 18 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-18 11:48:29,969 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 563 proven. 2 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-09-18 11:48:30,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:48:30,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 6, 5] total 23 [2018-09-18 11:48:30,571 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:48:30,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-18 11:48:30,572 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-18 11:48:30,572 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2018-09-18 11:48:30,573 INFO L87 Difference]: Start difference. First operand 17871 states and 20643 transitions. Second operand 15 states. [2018-09-18 11:48:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:48:41,430 INFO L93 Difference]: Finished difference Result 37508 states and 48798 transitions. [2018-09-18 11:48:41,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-18 11:48:41,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 554 [2018-09-18 11:48:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:48:41,599 INFO L225 Difference]: With dead ends: 37508 [2018-09-18 11:48:41,599 INFO L226 Difference]: Without dead ends: 19643 [2018-09-18 11:48:41,709 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2318 GetRequests, 2241 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=903, Invalid=4797, Unknown=0, NotChecked=0, Total=5700 [2018-09-18 11:48:41,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19643 states. [2018-09-18 11:48:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19643 to 18744. [2018-09-18 11:48:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18744 states. [2018-09-18 11:48:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18744 states to 18744 states and 23315 transitions. [2018-09-18 11:48:42,464 INFO L78 Accepts]: Start accepts. Automaton has 18744 states and 23315 transitions. Word has length 554 [2018-09-18 11:48:42,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:48:42,464 INFO L480 AbstractCegarLoop]: Abstraction has 18744 states and 23315 transitions. [2018-09-18 11:48:42,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-18 11:48:42,464 INFO L276 IsEmpty]: Start isEmpty. Operand 18744 states and 23315 transitions. [2018-09-18 11:48:42,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2018-09-18 11:48:42,477 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:48:42,478 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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] [2018-09-18 11:48:42,478 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:48:42,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1889513484, now seen corresponding path program 1 times [2018-09-18 11:48:42,479 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:48:42,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:42,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:42,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:42,480 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:48:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 718 proven. 2 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2018-09-18 11:48:43,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:43,064 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:48:43,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:43,073 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:43,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 718 proven. 2 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2018-09-18 11:48:43,725 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 718 proven. 2 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2018-09-18 11:48:44,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:44,054 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:48:44,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:44,073 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:44,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 718 proven. 2 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2018-09-18 11:48:44,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 718 proven. 2 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2018-09-18 11:48:44,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:48:44,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-18 11:48:44,904 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:48:44,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 11:48:44,905 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 11:48:44,906 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-18 11:48:44,906 INFO L87 Difference]: Start difference. First operand 18744 states and 23315 transitions. Second operand 7 states. [2018-09-18 11:48:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:48:47,360 INFO L93 Difference]: Finished difference Result 38838 states and 48576 transitions. [2018-09-18 11:48:47,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-18 11:48:47,361 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 673 [2018-09-18 11:48:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:48:47,449 INFO L225 Difference]: With dead ends: 38838 [2018-09-18 11:48:47,449 INFO L226 Difference]: Without dead ends: 20100 [2018-09-18 11:48:47,555 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2708 GetRequests, 2693 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-18 11:48:47,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20100 states. [2018-09-18 11:48:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20100 to 19968. [2018-09-18 11:48:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19968 states. [2018-09-18 11:48:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19968 states to 19968 states and 24092 transitions. [2018-09-18 11:48:48,103 INFO L78 Accepts]: Start accepts. Automaton has 19968 states and 24092 transitions. Word has length 673 [2018-09-18 11:48:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:48:48,104 INFO L480 AbstractCegarLoop]: Abstraction has 19968 states and 24092 transitions. [2018-09-18 11:48:48,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 11:48:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 19968 states and 24092 transitions. [2018-09-18 11:48:48,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 769 [2018-09-18 11:48:48,115 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:48:48,116 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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] [2018-09-18 11:48:48,116 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:48:48,117 INFO L82 PathProgramCache]: Analyzing trace with hash 112633644, now seen corresponding path program 1 times [2018-09-18 11:48:48,117 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:48:48,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:48,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:48,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:48:48,118 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:48:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 684 proven. 765 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-09-18 11:48:50,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:50,134 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:48:50,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:50,294 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:50,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 1308 proven. 2 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2018-09-18 11:48:50,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 685 proven. 188 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2018-09-18 11:48:51,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:48:51,477 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:48:51,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:48:51,493 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:48:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:48:51,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:48:52,097 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2018-09-18 11:48:54,491 WARN L178 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-09-18 11:48:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 802 proven. 50 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2018-09-18 11:48:55,238 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:48:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 850 proven. 2 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2018-09-18 11:48:57,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:48:57,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 6, 6] total 28 [2018-09-18 11:48:57,013 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:48:57,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-18 11:48:57,015 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-18 11:48:57,016 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2018-09-18 11:48:57,016 INFO L87 Difference]: Start difference. First operand 19968 states and 24092 transitions. Second operand 18 states. [2018-09-18 11:48:58,000 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2018-09-18 11:48:59,345 WARN L178 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2018-09-18 11:49:05,948 WARN L178 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2018-09-18 11:49:06,945 WARN L178 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2018-09-18 11:49:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:49:08,950 INFO L93 Difference]: Finished difference Result 42039 states and 51231 transitions. [2018-09-18 11:49:08,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-18 11:49:08,950 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 768 [2018-09-18 11:49:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:49:09,027 INFO L225 Difference]: With dead ends: 42039 [2018-09-18 11:49:09,027 INFO L226 Difference]: Without dead ends: 22077 [2018-09-18 11:49:09,121 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3159 GetRequests, 3088 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=907, Invalid=4205, Unknown=0, NotChecked=0, Total=5112 [2018-09-18 11:49:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22077 states. [2018-09-18 11:49:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22077 to 21344. [2018-09-18 11:49:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21344 states. [2018-09-18 11:49:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21344 states to 21344 states and 24179 transitions. [2018-09-18 11:49:09,601 INFO L78 Accepts]: Start accepts. Automaton has 21344 states and 24179 transitions. Word has length 768 [2018-09-18 11:49:09,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:49:09,601 INFO L480 AbstractCegarLoop]: Abstraction has 21344 states and 24179 transitions. [2018-09-18 11:49:09,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-18 11:49:09,602 INFO L276 IsEmpty]: Start isEmpty. Operand 21344 states and 24179 transitions. [2018-09-18 11:49:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-09-18 11:49:09,608 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:49:09,609 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:49:09,609 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:49:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1987097961, now seen corresponding path program 1 times [2018-09-18 11:49:09,609 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:49:09,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:49:09,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:09,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:49:09,611 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:49:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 726 proven. 581 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-09-18 11:49:11,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:11,130 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:49:11,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:11,141 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:11,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 1135 proven. 2 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-09-18 11:49:11,911 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 838 proven. 73 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2018-09-18 11:49:13,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:13,260 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:49:13,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:13,276 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:13,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 1135 proven. 2 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-09-18 11:49:14,252 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 838 proven. 73 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2018-09-18 11:49:15,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:49:15,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 5, 5] total 24 [2018-09-18 11:49:15,792 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:49:15,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-18 11:49:15,794 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-18 11:49:15,794 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2018-09-18 11:49:15,794 INFO L87 Difference]: Start difference. First operand 21344 states and 24179 transitions. Second operand 17 states. [2018-09-18 11:49:23,116 WARN L178 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2018-09-18 11:49:27,410 WARN L178 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2018-09-18 11:49:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:49:31,980 INFO L93 Difference]: Finished difference Result 44066 states and 50508 transitions. [2018-09-18 11:49:31,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-18 11:49:31,981 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 795 [2018-09-18 11:49:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:49:32,042 INFO L225 Difference]: With dead ends: 44066 [2018-09-18 11:49:32,043 INFO L226 Difference]: Without dead ends: 22913 [2018-09-18 11:49:32,108 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3340 GetRequests, 3233 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1828, Invalid=8678, Unknown=0, NotChecked=0, Total=10506 [2018-09-18 11:49:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22913 states. [2018-09-18 11:49:32,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22913 to 22004. [2018-09-18 11:49:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22004 states. [2018-09-18 11:49:32,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22004 states to 22004 states and 23998 transitions. [2018-09-18 11:49:32,487 INFO L78 Accepts]: Start accepts. Automaton has 22004 states and 23998 transitions. Word has length 795 [2018-09-18 11:49:32,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:49:32,487 INFO L480 AbstractCegarLoop]: Abstraction has 22004 states and 23998 transitions. [2018-09-18 11:49:32,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-18 11:49:32,487 INFO L276 IsEmpty]: Start isEmpty. Operand 22004 states and 23998 transitions. [2018-09-18 11:49:32,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2018-09-18 11:49:32,494 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:49:32,494 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:49:32,494 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:49:32,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1841135617, now seen corresponding path program 1 times [2018-09-18 11:49:32,495 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:49:32,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:49:32,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:32,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:49:32,496 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:49:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:34,008 WARN L178 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-18 11:49:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 671 proven. 1346 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2018-09-18 11:49:36,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:36,156 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:49:36,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:36,164 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:36,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 939 proven. 50 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-09-18 11:49:41,292 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:45,490 WARN L178 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-09-18 11:49:46,212 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-09-18 11:49:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 987 proven. 2 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-09-18 11:49:47,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:49:47,939 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:49:47,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:49:47,955 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:49:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:49:48,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:49:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 939 proven. 50 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-09-18 11:49:51,143 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:49:51,684 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-09-18 11:49:51,790 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-09-18 11:49:51,891 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-09-18 11:49:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 987 proven. 2 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-09-18 11:49:53,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:49:53,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 6, 6, 6, 6] total 28 [2018-09-18 11:49:53,017 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:49:53,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-18 11:49:53,019 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-18 11:49:53,019 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=637, Unknown=3, NotChecked=0, Total=756 [2018-09-18 11:49:53,020 INFO L87 Difference]: Start difference. First operand 22004 states and 23998 transitions. Second operand 25 states. [2018-09-18 11:49:57,095 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2018-09-18 11:49:59,762 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2018-09-18 11:50:04,359 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2018-09-18 11:50:15,993 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2018-09-18 11:50:17,721 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2018-09-18 11:50:26,066 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2018-09-18 11:50:28,496 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2018-09-18 11:50:30,337 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2018-09-18 11:50:46,163 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2018-09-18 11:50:55,036 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 Received shutdown request... [2018-09-18 11:51:00,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-18 11:51:00,067 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 11:51:00,074 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 11:51:00,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 11:51:00 BoogieIcfgContainer [2018-09-18 11:51:00,075 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 11:51:00,077 INFO L168 Benchmark]: Toolchain (without parser) took 238554.08 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -510.3 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-09-18 11:51:00,078 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 11:51:00,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 796.97 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-09-18 11:51:00,079 INFO L168 Benchmark]: Boogie Procedure Inliner took 146.52 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. [2018-09-18 11:51:00,080 INFO L168 Benchmark]: Boogie Preprocessor took 258.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -889.5 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2018-09-18 11:51:00,081 INFO L168 Benchmark]: RCFGBuilder took 3884.62 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 121.5 MB). Peak memory consumption was 121.5 MB. Max. memory is 7.1 GB. [2018-09-18 11:51:00,086 INFO L168 Benchmark]: TraceAbstraction took 233456.70 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 204.7 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-09-18 11:51:00,094 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 796.97 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 146.52 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 Preprocessor took 258.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -889.5 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3884.62 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 121.5 MB). Peak memory consumption was 121.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233456.70 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 204.7 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 160]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 160). Cancelled while BasicCegarLoop was constructing difference of abstraction (22004states) and FLOYD_HOARE automaton (currently 98 states, 25 states before enhancement), while ReachableStatesComputation was computing reachable states (24701 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 233.3s OverallTime, 17 OverallIterations, 8 TraceHistogramMax, 160.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1879 SDtfs, 50563 SDslu, 5009 SDs, 0 SdLazy, 64288 SolverSat, 9147 SolverUnsat, 23 SolverUnknown, 0 SolverNotchecked, 116.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25314 GetRequests, 24630 SyntacticMatches, 54 SemanticMatches, 630 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15097 ImplicationChecksByTransitivity, 50.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22004occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 5.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 6979 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 5.1s SatisfiabilityAnalysisTime, 53.4s InterpolantComputationTime, 19378 NumberOfCodeBlocks, 19378 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 31539 ConstructedInterpolants, 431 QuantifiedInterpolants, 96398747 SizeOfPredicates, 63 NumberOfNonLiveVariables, 18407 ConjunctsInSsa, 300 ConjunctsInUnsatCore, 61 InterpolantComputations, 7 PerfectInterpolantSequences, 57110/63880 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label04_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_11-51-00-119.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label04_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_11-51-00-119.csv Completed graceful shutdown