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/psyco/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 18:27:27,960 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 18:27:27,965 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 18:27:27,982 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 18:27:27,983 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 18:27:27,984 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 18:27:27,985 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 18:27:27,987 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 18:27:27,988 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 18:27:27,989 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 18:27:27,990 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 18:27:27,990 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 18:27:27,991 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 18:27:27,992 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 18:27:27,993 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 18:27:27,994 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 18:27:27,995 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 18:27:27,997 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 18:27:27,999 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 18:27:28,000 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 18:27:28,001 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 18:27:28,002 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 18:27:28,005 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 18:27:28,005 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 18:27:28,006 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 18:27:28,006 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 18:27:28,008 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 18:27:28,008 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 18:27:28,009 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 18:27:28,011 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 18:27:28,011 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 18:27:28,012 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 18:27:28,012 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 18:27:28,012 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 18:27:28,013 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 18:27:28,014 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 18:27:28,014 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 [2018-09-14 18:27:28,042 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 18:27:28,042 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 18:27:28,043 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 18:27:28,043 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 18:27:28,043 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 18:27:28,044 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 18:27:28,044 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 18:27:28,044 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 18:27:28,044 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 18:27:28,045 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 18:27:28,045 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 18:27:28,048 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 18:27:28,049 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 18:27:28,049 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 18:27:28,049 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 18:27:28,049 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 18:27:28,050 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 18:27:28,050 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 18:27:28,050 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 18:27:28,050 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 18:27:28,051 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 18:27:28,051 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 18:27:28,051 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 18:27:28,051 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 18:27:28,053 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 18:27:28,053 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 18:27:28,053 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 18:27:28,053 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 18:27:28,054 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 18:27:28,054 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 18:27:28,054 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 18:27:28,054 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 18:27:28,054 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 18:27:28,121 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 18:27:28,135 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 18:27:28,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 18:27:28,142 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 18:27:28,142 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 18:27:28,142 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c [2018-09-14 18:27:28,521 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87c344f1a/7452f154a37e4095affbc8ef75084087/FLAGd4c1b91ab [2018-09-14 18:27:28,748 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 18:27:28,749 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c [2018-09-14 18:27:28,763 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87c344f1a/7452f154a37e4095affbc8ef75084087/FLAGd4c1b91ab [2018-09-14 18:27:28,779 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87c344f1a/7452f154a37e4095affbc8ef75084087 [2018-09-14 18:27:28,791 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 18:27:28,794 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 18:27:28,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 18:27:28,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 18:27:28,803 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 18:27:28,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 06:27:28" (1/1) ... [2018-09-14 18:27:28,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@560f8b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:28, skipping insertion in model container [2018-09-14 18:27:28,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 06:27:28" (1/1) ... [2018-09-14 18:27:28,820 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 18:27:29,166 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 18:27:29,188 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 18:27:29,309 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 18:27:29,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:29 WrapperNode [2018-09-14 18:27:29,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 18:27:29,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 18:27:29,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 18:27:29,377 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 18:27:29,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:29" (1/1) ... [2018-09-14 18:27:29,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:29" (1/1) ... [2018-09-14 18:27:29,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 18:27:29,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 18:27:29,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 18:27:29,425 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 18:27:29,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:29" (1/1) ... [2018-09-14 18:27:29,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:29" (1/1) ... [2018-09-14 18:27:29,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:29" (1/1) ... [2018-09-14 18:27:29,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:29" (1/1) ... [2018-09-14 18:27:29,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:29" (1/1) ... [2018-09-14 18:27:29,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:29" (1/1) ... [2018-09-14 18:27:29,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:29" (1/1) ... [2018-09-14 18:27:29,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 18:27:29,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 18:27:29,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 18:27:29,507 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 18:27:29,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:29" (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 [2018-09-14 18:27:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 18:27:29,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 18:27:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 18:27:29,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 18:27:29,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 18:27:29,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 18:27:31,465 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 18:27:31,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 06:27:31 BoogieIcfgContainer [2018-09-14 18:27:31,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 18:27:31,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 18:27:31,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 18:27:31,470 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 18:27:31,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 06:27:28" (1/3) ... [2018-09-14 18:27:31,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 06:27:31, skipping insertion in model container [2018-09-14 18:27:31,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 06:27:29" (2/3) ... [2018-09-14 18:27:31,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 06:27:31, skipping insertion in model container [2018-09-14 18:27:31,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 06:27:31" (3/3) ... [2018-09-14 18:27:31,474 INFO L112 eAbstractionObserver]: Analyzing ICFG psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c [2018-09-14 18:27:31,484 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 18:27:31,494 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 18:27:31,546 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 18:27:31,547 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 18:27:31,547 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 18:27:31,547 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 18:27:31,547 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 18:27:31,548 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 18:27:31,548 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 18:27:31,548 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 18:27:31,548 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 18:27:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states. [2018-09-14 18:27:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-14 18:27:31,592 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:31,593 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:31,594 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:31,600 INFO L82 PathProgramCache]: Analyzing trace with hash -784715869, now seen corresponding path program 1 times [2018-09-14 18:27:31,603 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:31,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:31,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:31,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:31,654 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:31,780 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:27:31,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-14 18:27:31,780 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:27:31,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-14 18:27:31,810 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-14 18:27:31,811 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-14 18:27:31,814 INFO L87 Difference]: Start difference. First operand 114 states. Second operand 2 states. [2018-09-14 18:27:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:31,868 INFO L93 Difference]: Finished difference Result 222 states and 422 transitions. [2018-09-14 18:27:31,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-14 18:27:31,870 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-09-14 18:27:31,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:31,883 INFO L225 Difference]: With dead ends: 222 [2018-09-14 18:27:31,884 INFO L226 Difference]: Without dead ends: 104 [2018-09-14 18:27:31,888 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-14 18:27:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-14 18:27:31,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-14 18:27:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-14 18:27:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 169 transitions. [2018-09-14 18:27:31,950 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 169 transitions. Word has length 13 [2018-09-14 18:27:31,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:31,951 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 169 transitions. [2018-09-14 18:27:31,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-14 18:27:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 169 transitions. [2018-09-14 18:27:31,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-14 18:27:31,952 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:31,952 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:31,953 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:31,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1976099357, now seen corresponding path program 1 times [2018-09-14 18:27:31,953 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:31,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:31,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:31,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:31,955 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:32,032 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:27:32,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 18:27:32,032 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:27:32,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 18:27:32,034 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 18:27:32,035 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:32,035 INFO L87 Difference]: Start difference. First operand 104 states and 169 transitions. Second operand 3 states. [2018-09-14 18:27:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:32,312 INFO L93 Difference]: Finished difference Result 205 states and 336 transitions. [2018-09-14 18:27:32,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 18:27:32,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-09-14 18:27:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:32,315 INFO L225 Difference]: With dead ends: 205 [2018-09-14 18:27:32,315 INFO L226 Difference]: Without dead ends: 107 [2018-09-14 18:27:32,319 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-14 18:27:32,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-14 18:27:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-14 18:27:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 172 transitions. [2018-09-14 18:27:32,344 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 172 transitions. Word has length 14 [2018-09-14 18:27:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:32,344 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 172 transitions. [2018-09-14 18:27:32,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 18:27:32,345 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 172 transitions. [2018-09-14 18:27:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-14 18:27:32,346 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:32,346 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:32,346 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:32,347 INFO L82 PathProgramCache]: Analyzing trace with hash 645002054, now seen corresponding path program 1 times [2018-09-14 18:27:32,347 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:32,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:32,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:32,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:32,350 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:32,529 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:27:32,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 18:27:32,530 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:27:32,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 18:27:32,530 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 18:27:32,531 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:32,531 INFO L87 Difference]: Start difference. First operand 107 states and 172 transitions. Second operand 3 states. [2018-09-14 18:27:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:33,081 INFO L93 Difference]: Finished difference Result 209 states and 338 transitions. [2018-09-14 18:27:33,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 18:27:33,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-09-14 18:27:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:33,085 INFO L225 Difference]: With dead ends: 209 [2018-09-14 18:27:33,085 INFO L226 Difference]: Without dead ends: 190 [2018-09-14 18:27:33,086 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:33,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-14 18:27:33,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 176. [2018-09-14 18:27:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-14 18:27:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 285 transitions. [2018-09-14 18:27:33,103 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 285 transitions. Word has length 19 [2018-09-14 18:27:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:33,104 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 285 transitions. [2018-09-14 18:27:33,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 18:27:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 285 transitions. [2018-09-14 18:27:33,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-14 18:27:33,105 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:33,106 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:33,106 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:33,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1271474490, now seen corresponding path program 1 times [2018-09-14 18:27:33,107 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:33,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:33,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:33,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:33,108 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:33,234 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:27:33,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 18:27:33,234 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:27:33,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 18:27:33,235 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 18:27:33,235 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:33,236 INFO L87 Difference]: Start difference. First operand 176 states and 285 transitions. Second operand 3 states. [2018-09-14 18:27:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:33,289 INFO L93 Difference]: Finished difference Result 297 states and 481 transitions. [2018-09-14 18:27:33,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 18:27:33,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2018-09-14 18:27:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:33,292 INFO L225 Difference]: With dead ends: 297 [2018-09-14 18:27:33,292 INFO L226 Difference]: Without dead ends: 128 [2018-09-14 18:27:33,294 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-14 18:27:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2018-09-14 18:27:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-14 18:27:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 198 transitions. [2018-09-14 18:27:33,306 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 198 transitions. Word has length 20 [2018-09-14 18:27:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:33,306 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 198 transitions. [2018-09-14 18:27:33,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 18:27:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 198 transitions. [2018-09-14 18:27:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-14 18:27:33,308 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:33,308 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:33,308 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:33,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2078068567, now seen corresponding path program 1 times [2018-09-14 18:27:33,309 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:33,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:33,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:33,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:33,310 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-14 18:27:33,411 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:27:33,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 18:27:33,412 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:27:33,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 18:27:33,413 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 18:27:33,413 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:33,414 INFO L87 Difference]: Start difference. First operand 126 states and 198 transitions. Second operand 3 states. [2018-09-14 18:27:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:33,694 INFO L93 Difference]: Finished difference Result 230 states and 362 transitions. [2018-09-14 18:27:33,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 18:27:33,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-09-14 18:27:33,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:33,696 INFO L225 Difference]: With dead ends: 230 [2018-09-14 18:27:33,697 INFO L226 Difference]: Without dead ends: 111 [2018-09-14 18:27:33,698 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:33,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-14 18:27:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2018-09-14 18:27:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-14 18:27:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 167 transitions. [2018-09-14 18:27:33,721 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 167 transitions. Word has length 25 [2018-09-14 18:27:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:33,721 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 167 transitions. [2018-09-14 18:27:33,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 18:27:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 167 transitions. [2018-09-14 18:27:33,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-14 18:27:33,726 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:33,726 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:33,727 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:33,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2048080470, now seen corresponding path program 1 times [2018-09-14 18:27:33,733 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:33,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:33,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:33,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:33,734 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:34,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:34,024 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 [2018-09-14 18:27:34,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:34,041 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:34,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:34,194 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:34,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:34,373 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 3 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 18:27:34,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:34,390 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:34,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:34,506 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:34,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:27:34,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 6 [2018-09-14 18:27:34,569 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:27:34,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 18:27:34,570 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 18:27:34,571 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-14 18:27:34,574 INFO L87 Difference]: Start difference. First operand 109 states and 167 transitions. Second operand 4 states. [2018-09-14 18:27:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:35,124 INFO L93 Difference]: Finished difference Result 192 states and 299 transitions. [2018-09-14 18:27:35,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 18:27:35,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-09-14 18:27:35,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:35,129 INFO L225 Difference]: With dead ends: 192 [2018-09-14 18:27:35,129 INFO L226 Difference]: Without dead ends: 174 [2018-09-14 18:27:35,130 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-14 18:27:35,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-09-14 18:27:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2018-09-14 18:27:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-14 18:27:35,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 265 transitions. [2018-09-14 18:27:35,142 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 265 transitions. Word has length 27 [2018-09-14 18:27:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:35,143 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 265 transitions. [2018-09-14 18:27:35,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 18:27:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 265 transitions. [2018-09-14 18:27:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-14 18:27:35,145 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:35,145 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:35,145 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:35,146 INFO L82 PathProgramCache]: Analyzing trace with hash 945458420, now seen corresponding path program 1 times [2018-09-14 18:27:35,146 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:35,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:35,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:35,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:35,147 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:35,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:35,353 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 [2018-09-14 18:27:35,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:35,371 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:35,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:35,735 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:35,932 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 13 [2018-09-14 18:27:36,096 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 19 [2018-09-14 18:27:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-14 18:27:36,127 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 18:27:36,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 7 [2018-09-14 18:27:36,127 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:27:36,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 18:27:36,128 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 18:27:36,128 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-14 18:27:36,129 INFO L87 Difference]: Start difference. First operand 172 states and 265 transitions. Second operand 4 states. [2018-09-14 18:27:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:36,748 INFO L93 Difference]: Finished difference Result 289 states and 444 transitions. [2018-09-14 18:27:36,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 18:27:36,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2018-09-14 18:27:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:36,751 INFO L225 Difference]: With dead ends: 289 [2018-09-14 18:27:36,751 INFO L226 Difference]: Without dead ends: 280 [2018-09-14 18:27:36,752 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-14 18:27:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-09-14 18:27:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 262. [2018-09-14 18:27:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-09-14 18:27:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 408 transitions. [2018-09-14 18:27:36,771 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 408 transitions. Word has length 28 [2018-09-14 18:27:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:36,771 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 408 transitions. [2018-09-14 18:27:36,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 18:27:36,772 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 408 transitions. [2018-09-14 18:27:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-14 18:27:36,773 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:36,773 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:36,773 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:36,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1709359769, now seen corresponding path program 1 times [2018-09-14 18:27:36,774 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:36,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:36,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:36,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:36,775 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-14 18:27:36,854 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:27:36,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 18:27:36,854 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:27:36,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 18:27:36,855 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 18:27:36,855 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:36,855 INFO L87 Difference]: Start difference. First operand 262 states and 408 transitions. Second operand 3 states. [2018-09-14 18:27:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:37,096 INFO L93 Difference]: Finished difference Result 454 states and 703 transitions. [2018-09-14 18:27:37,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 18:27:37,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-09-14 18:27:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:37,102 INFO L225 Difference]: With dead ends: 454 [2018-09-14 18:27:37,102 INFO L226 Difference]: Without dead ends: 220 [2018-09-14 18:27:37,103 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-09-14 18:27:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2018-09-14 18:27:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-09-14 18:27:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 326 transitions. [2018-09-14 18:27:37,113 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 326 transitions. Word has length 29 [2018-09-14 18:27:37,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:37,113 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 326 transitions. [2018-09-14 18:27:37,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 18:27:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 326 transitions. [2018-09-14 18:27:37,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-14 18:27:37,115 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:37,115 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:37,115 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:37,115 INFO L82 PathProgramCache]: Analyzing trace with hash -847629460, now seen corresponding path program 1 times [2018-09-14 18:27:37,116 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:37,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:37,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:37,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:37,117 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:37,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:37,401 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 18:27:37,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:37,416 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:37,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 18:27:37,488 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:37,905 WARN L178 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 20 [2018-09-14 18:27:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 18:27:37,971 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 18:27:37,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2018-09-14 18:27:37,972 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:27:37,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 18:27:37,972 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 18:27:37,972 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-14 18:27:37,973 INFO L87 Difference]: Start difference. First operand 218 states and 326 transitions. Second operand 3 states. [2018-09-14 18:27:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:37,992 INFO L93 Difference]: Finished difference Result 221 states and 328 transitions. [2018-09-14 18:27:37,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 18:27:37,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2018-09-14 18:27:37,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:37,996 INFO L225 Difference]: With dead ends: 221 [2018-09-14 18:27:37,996 INFO L226 Difference]: Without dead ends: 215 [2018-09-14 18:27:37,997 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-14 18:27:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-14 18:27:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2018-09-14 18:27:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-14 18:27:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 317 transitions. [2018-09-14 18:27:38,009 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 317 transitions. Word has length 31 [2018-09-14 18:27:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:38,009 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 317 transitions. [2018-09-14 18:27:38,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 18:27:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 317 transitions. [2018-09-14 18:27:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-14 18:27:38,011 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:38,011 INFO L376 BasicCegarLoop]: trace histogram [4, 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] [2018-09-14 18:27:38,011 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:38,012 INFO L82 PathProgramCache]: Analyzing trace with hash -592457384, now seen corresponding path program 1 times [2018-09-14 18:27:38,012 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:38,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:38,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:38,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:38,013 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-14 18:27:38,104 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:27:38,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 18:27:38,105 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:27:38,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 18:27:38,105 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 18:27:38,105 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:38,106 INFO L87 Difference]: Start difference. First operand 214 states and 317 transitions. Second operand 3 states. [2018-09-14 18:27:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:38,200 INFO L93 Difference]: Finished difference Result 363 states and 541 transitions. [2018-09-14 18:27:38,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 18:27:38,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2018-09-14 18:27:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:38,202 INFO L225 Difference]: With dead ends: 363 [2018-09-14 18:27:38,202 INFO L226 Difference]: Without dead ends: 177 [2018-09-14 18:27:38,203 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-14 18:27:38,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2018-09-14 18:27:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-14 18:27:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 257 transitions. [2018-09-14 18:27:38,211 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 257 transitions. Word has length 36 [2018-09-14 18:27:38,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:38,212 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 257 transitions. [2018-09-14 18:27:38,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 18:27:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 257 transitions. [2018-09-14 18:27:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-14 18:27:38,213 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:38,213 INFO L376 BasicCegarLoop]: trace histogram [4, 3, 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] [2018-09-14 18:27:38,213 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:38,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1564943497, now seen corresponding path program 1 times [2018-09-14 18:27:38,214 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:38,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:38,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:38,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:38,215 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 18:27:38,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:38,353 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 [2018-09-14 18:27:38,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:38,363 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:38,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 18:27:38,459 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 18:27:38,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:38,762 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 [2018-09-14 18:27:38,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:38,789 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:38,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 18:27:38,942 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 18:27:39,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:27:39,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-09-14 18:27:39,148 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:27:39,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 18:27:39,149 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 18:27:39,149 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-14 18:27:39,149 INFO L87 Difference]: Start difference. First operand 175 states and 257 transitions. Second operand 5 states. [2018-09-14 18:27:39,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:39,398 INFO L93 Difference]: Finished difference Result 252 states and 370 transitions. [2018-09-14 18:27:39,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 18:27:39,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2018-09-14 18:27:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:39,401 INFO L225 Difference]: With dead ends: 252 [2018-09-14 18:27:39,401 INFO L226 Difference]: Without dead ends: 247 [2018-09-14 18:27:39,401 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-14 18:27:39,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-14 18:27:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 241. [2018-09-14 18:27:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-14 18:27:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 356 transitions. [2018-09-14 18:27:39,411 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 356 transitions. Word has length 37 [2018-09-14 18:27:39,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:39,411 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 356 transitions. [2018-09-14 18:27:39,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 18:27:39,412 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 356 transitions. [2018-09-14 18:27:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-14 18:27:39,412 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:39,412 INFO L376 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:39,413 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:39,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2138202118, now seen corresponding path program 1 times [2018-09-14 18:27:39,413 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:39,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:39,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:39,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:39,414 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:39,621 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 18:27:39,939 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 18:27:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:39,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:39,946 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 [2018-09-14 18:27:39,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:39,962 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:40,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:40,256 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:40,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:40,825 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 [2018-09-14 18:27:40,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:40,841 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:41,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:41,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:41,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:27:41,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 5, 5] total 11 [2018-09-14 18:27:41,449 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:27:41,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 18:27:41,450 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 18:27:41,450 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-14 18:27:41,450 INFO L87 Difference]: Start difference. First operand 241 states and 356 transitions. Second operand 6 states. [2018-09-14 18:27:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:41,916 INFO L93 Difference]: Finished difference Result 251 states and 365 transitions. [2018-09-14 18:27:41,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 18:27:41,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2018-09-14 18:27:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:41,920 INFO L225 Difference]: With dead ends: 251 [2018-09-14 18:27:41,921 INFO L226 Difference]: Without dead ends: 249 [2018-09-14 18:27:41,921 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 150 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-14 18:27:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-14 18:27:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2018-09-14 18:27:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-09-14 18:27:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 357 transitions. [2018-09-14 18:27:41,930 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 357 transitions. Word has length 40 [2018-09-14 18:27:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:41,930 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 357 transitions. [2018-09-14 18:27:41,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 18:27:41,931 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 357 transitions. [2018-09-14 18:27:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-14 18:27:41,931 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:41,932 INFO L376 BasicCegarLoop]: trace histogram [4, 3, 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] [2018-09-14 18:27:41,932 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:41,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1984993975, now seen corresponding path program 1 times [2018-09-14 18:27:41,932 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:41,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:41,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:41,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:41,934 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-14 18:27:42,013 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:27:42,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 18:27:42,014 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:27:42,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 18:27:42,015 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 18:27:42,015 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:42,015 INFO L87 Difference]: Start difference. First operand 242 states and 357 transitions. Second operand 3 states. [2018-09-14 18:27:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:42,091 INFO L93 Difference]: Finished difference Result 422 states and 620 transitions. [2018-09-14 18:27:42,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 18:27:42,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2018-09-14 18:27:42,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:42,093 INFO L225 Difference]: With dead ends: 422 [2018-09-14 18:27:42,093 INFO L226 Difference]: Without dead ends: 226 [2018-09-14 18:27:42,094 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-09-14 18:27:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2018-09-14 18:27:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-09-14 18:27:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 320 transitions. [2018-09-14 18:27:42,104 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 320 transitions. Word has length 41 [2018-09-14 18:27:42,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:42,104 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 320 transitions. [2018-09-14 18:27:42,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 18:27:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 320 transitions. [2018-09-14 18:27:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-14 18:27:42,105 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:42,106 INFO L376 BasicCegarLoop]: trace histogram [5, 4, 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] [2018-09-14 18:27:42,106 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:42,106 INFO L82 PathProgramCache]: Analyzing trace with hash -636700121, now seen corresponding path program 1 times [2018-09-14 18:27:42,106 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:42,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:42,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:42,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:42,113 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-09-14 18:27:42,212 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 18:27:42,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 18:27:42,212 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 18:27:42,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 18:27:42,213 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 18:27:42,213 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:42,214 INFO L87 Difference]: Start difference. First operand 224 states and 320 transitions. Second operand 3 states. [2018-09-14 18:27:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:42,483 INFO L93 Difference]: Finished difference Result 305 states and 435 transitions. [2018-09-14 18:27:42,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 18:27:42,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2018-09-14 18:27:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:42,486 INFO L225 Difference]: With dead ends: 305 [2018-09-14 18:27:42,486 INFO L226 Difference]: Without dead ends: 146 [2018-09-14 18:27:42,487 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 18:27:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-14 18:27:42,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2018-09-14 18:27:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-14 18:27:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 200 transitions. [2018-09-14 18:27:42,494 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 200 transitions. Word has length 50 [2018-09-14 18:27:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:42,495 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 200 transitions. [2018-09-14 18:27:42,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 18:27:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 200 transitions. [2018-09-14 18:27:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-14 18:27:42,496 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:42,496 INFO L376 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:42,496 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:42,496 INFO L82 PathProgramCache]: Analyzing trace with hash 783335988, now seen corresponding path program 1 times [2018-09-14 18:27:42,496 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:42,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:42,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:42,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:42,498 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 18:27:42,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:42,944 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 [2018-09-14 18:27:42,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:42,960 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:43,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:43,262 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:43,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:43,370 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 [2018-09-14 18:27:43,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:43,387 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:43,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 18:27:43,537 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-14 18:27:43,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:27:43,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 5, 4] total 15 [2018-09-14 18:27:43,592 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:27:43,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 18:27:43,593 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 18:27:43,593 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2018-09-14 18:27:43,593 INFO L87 Difference]: Start difference. First operand 144 states and 200 transitions. Second operand 9 states. [2018-09-14 18:27:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:44,044 INFO L93 Difference]: Finished difference Result 187 states and 260 transitions. [2018-09-14 18:27:44,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 18:27:44,045 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2018-09-14 18:27:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:44,047 INFO L225 Difference]: With dead ends: 187 [2018-09-14 18:27:44,047 INFO L226 Difference]: Without dead ends: 183 [2018-09-14 18:27:44,047 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2018-09-14 18:27:44,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-14 18:27:44,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2018-09-14 18:27:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-14 18:27:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 251 transitions. [2018-09-14 18:27:44,057 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 251 transitions. Word has length 51 [2018-09-14 18:27:44,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:44,058 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 251 transitions. [2018-09-14 18:27:44,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 18:27:44,058 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 251 transitions. [2018-09-14 18:27:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-14 18:27:44,059 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:44,059 INFO L376 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 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] [2018-09-14 18:27:44,059 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:44,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1248250631, now seen corresponding path program 1 times [2018-09-14 18:27:44,059 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:44,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:44,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:44,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:44,061 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:44,327 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 18:27:44,474 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 18:27:44,932 WARN L178 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-09-14 18:27:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:45,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:45,090 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 [2018-09-14 18:27:45,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:45,098 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:45,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:45,338 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:45,718 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 21 [2018-09-14 18:27:47,093 WARN L178 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 26 [2018-09-14 18:27:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-14 18:27:47,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:47,140 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 [2018-09-14 18:27:47,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:47,156 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:47,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:47,960 WARN L178 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2018-09-14 18:27:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:47,980 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-14 18:27:48,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:27:48,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7, 8, 7] total 16 [2018-09-14 18:27:48,233 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:27:48,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 18:27:48,234 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 18:27:48,234 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2018-09-14 18:27:48,235 INFO L87 Difference]: Start difference. First operand 180 states and 251 transitions. Second operand 9 states. [2018-09-14 18:27:48,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:48,763 INFO L93 Difference]: Finished difference Result 184 states and 255 transitions. [2018-09-14 18:27:48,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 18:27:48,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2018-09-14 18:27:48,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:48,765 INFO L225 Difference]: With dead ends: 184 [2018-09-14 18:27:48,766 INFO L226 Difference]: Without dead ends: 182 [2018-09-14 18:27:48,766 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 232 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2018-09-14 18:27:48,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-14 18:27:48,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2018-09-14 18:27:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-14 18:27:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 252 transitions. [2018-09-14 18:27:48,774 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 252 transitions. Word has length 61 [2018-09-14 18:27:48,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:48,774 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 252 transitions. [2018-09-14 18:27:48,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 18:27:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 252 transitions. [2018-09-14 18:27:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-14 18:27:48,775 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:48,775 INFO L376 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:48,776 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:48,776 INFO L82 PathProgramCache]: Analyzing trace with hash 564297596, now seen corresponding path program 1 times [2018-09-14 18:27:48,776 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:48,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:48,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:48,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:48,777 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 18:27:49,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:49,422 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 [2018-09-14 18:27:49,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:49,437 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:49,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 18:27:49,614 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-14 18:27:49,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:49,888 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 [2018-09-14 18:27:49,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:49,903 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:50,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 18:27:50,149 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-14 18:27:50,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:27:50,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4, 6, 4] total 9 [2018-09-14 18:27:50,427 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:27:50,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 18:27:50,428 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 18:27:50,428 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-09-14 18:27:50,429 INFO L87 Difference]: Start difference. First operand 181 states and 252 transitions. Second operand 7 states. [2018-09-14 18:27:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:50,542 INFO L93 Difference]: Finished difference Result 223 states and 308 transitions. [2018-09-14 18:27:50,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 18:27:50,542 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2018-09-14 18:27:50,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:50,544 INFO L225 Difference]: With dead ends: 223 [2018-09-14 18:27:50,544 INFO L226 Difference]: Without dead ends: 220 [2018-09-14 18:27:50,545 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 308 SyntacticMatches, 10 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-09-14 18:27:50,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-09-14 18:27:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2018-09-14 18:27:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-14 18:27:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 302 transitions. [2018-09-14 18:27:50,555 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 302 transitions. Word has length 79 [2018-09-14 18:27:50,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:50,556 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 302 transitions. [2018-09-14 18:27:50,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 18:27:50,556 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 302 transitions. [2018-09-14 18:27:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-14 18:27:50,557 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:50,558 INFO L376 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:50,558 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:50,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1030800333, now seen corresponding path program 1 times [2018-09-14 18:27:50,558 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:50,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:50,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:50,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:50,560 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:50,861 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 18:27:51,019 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 18:27:51,204 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 18:27:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:51,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:51,367 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 [2018-09-14 18:27:51,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:51,376 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:51,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:51,569 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:51,861 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 23 [2018-09-14 18:27:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 29 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-14 18:27:52,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:52,424 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 [2018-09-14 18:27:52,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:52,440 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:53,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:53,089 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 72 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-14 18:27:53,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:27:53,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 9, 6] total 16 [2018-09-14 18:27:53,413 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:27:53,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-14 18:27:53,414 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-14 18:27:53,414 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-14 18:27:53,414 INFO L87 Difference]: Start difference. First operand 217 states and 302 transitions. Second operand 10 states. [2018-09-14 18:27:53,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:53,673 INFO L93 Difference]: Finished difference Result 220 states and 305 transitions. [2018-09-14 18:27:53,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-14 18:27:53,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2018-09-14 18:27:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:53,675 INFO L225 Difference]: With dead ends: 220 [2018-09-14 18:27:53,675 INFO L226 Difference]: Without dead ends: 218 [2018-09-14 18:27:53,676 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 317 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-14 18:27:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-14 18:27:53,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-09-14 18:27:53,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-09-14 18:27:53,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 303 transitions. [2018-09-14 18:27:53,684 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 303 transitions. Word has length 82 [2018-09-14 18:27:53,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:53,684 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 303 transitions. [2018-09-14 18:27:53,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-14 18:27:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 303 transitions. [2018-09-14 18:27:53,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-14 18:27:53,686 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:53,686 INFO L376 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 4, 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] [2018-09-14 18:27:53,686 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash 644642791, now seen corresponding path program 1 times [2018-09-14 18:27:53,686 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:53,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:53,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:53,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:53,687 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 123 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 18:27:53,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:53,894 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 [2018-09-14 18:27:53,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:53,902 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:53,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:54,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-09-14 18:27:54,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:54,296 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 [2018-09-14 18:27:54,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:54,311 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 18:27:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:54,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 123 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 18:27:54,595 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-14 18:27:54,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:27:54,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 6, 7, 4] total 21 [2018-09-14 18:27:54,817 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:27:54,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-14 18:27:54,818 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-14 18:27:54,819 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-09-14 18:27:54,819 INFO L87 Difference]: Start difference. First operand 218 states and 303 transitions. Second operand 15 states. [2018-09-14 18:27:55,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:55,085 INFO L93 Difference]: Finished difference Result 261 states and 363 transitions. [2018-09-14 18:27:55,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-14 18:27:55,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 93 [2018-09-14 18:27:55,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:55,088 INFO L225 Difference]: With dead ends: 261 [2018-09-14 18:27:55,088 INFO L226 Difference]: Without dead ends: 257 [2018-09-14 18:27:55,089 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 360 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-09-14 18:27:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-14 18:27:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 254. [2018-09-14 18:27:55,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-09-14 18:27:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2018-09-14 18:27:55,098 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 93 [2018-09-14 18:27:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:55,099 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2018-09-14 18:27:55,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-14 18:27:55,099 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2018-09-14 18:27:55,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-14 18:27:55,100 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:55,100 INFO L376 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:55,100 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:55,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1306502892, now seen corresponding path program 2 times [2018-09-14 18:27:55,101 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:55,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:55,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 18:27:55,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:55,102 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:27:55,416 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 18:27:55,559 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 18:27:55,753 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-09-14 18:27:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:55,921 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:55,921 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 [2018-09-14 18:27:55,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 18:27:55,930 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 18:27:56,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 18:27:56,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 18:27:56,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:56,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:57,000 WARN L178 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 21 [2018-09-14 18:27:57,711 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-09-14 18:27:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 42 proven. 106 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-09-14 18:27:57,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:27:57,847 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 [2018-09-14 18:27:57,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 18:27:57,864 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 18:27:58,428 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 18:27:58,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 18:27:58,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:27:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:27:58,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:27:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 128 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-09-14 18:27:58,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:27:58,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8, 12, 7] total 21 [2018-09-14 18:27:58,851 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:27:58,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-14 18:27:58,852 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-14 18:27:58,852 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2018-09-14 18:27:58,852 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand 14 states. [2018-09-14 18:27:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:27:59,501 INFO L93 Difference]: Finished difference Result 264 states and 364 transitions. [2018-09-14 18:27:59,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-14 18:27:59,501 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 103 [2018-09-14 18:27:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:27:59,504 INFO L225 Difference]: With dead ends: 264 [2018-09-14 18:27:59,504 INFO L226 Difference]: Without dead ends: 262 [2018-09-14 18:27:59,505 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 396 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2018-09-14 18:27:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-09-14 18:27:59,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 255. [2018-09-14 18:27:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-14 18:27:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 355 transitions. [2018-09-14 18:27:59,516 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 355 transitions. Word has length 103 [2018-09-14 18:27:59,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:27:59,516 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 355 transitions. [2018-09-14 18:27:59,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-14 18:27:59,517 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 355 transitions. [2018-09-14 18:27:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-14 18:27:59,518 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:27:59,518 INFO L376 BasicCegarLoop]: trace histogram [12, 11, 8, 8, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:27:59,518 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:27:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash -498500945, now seen corresponding path program 2 times [2018-09-14 18:27:59,519 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:27:59,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:59,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 18:27:59,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:27:59,520 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:27:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:28:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 248 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-14 18:28:00,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:28:00,232 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 [2018-09-14 18:28:00,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 18:28:00,241 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 18:28:00,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 18:28:00,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 18:28:00,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:28:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 248 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-14 18:28:00,427 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:28:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 120 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-09-14 18:28:00,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:28:00,655 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 [2018-09-14 18:28:00,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 18:28:00,672 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 18:28:01,031 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 18:28:01,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 18:28:01,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:28:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 248 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-14 18:28:01,108 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:28:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 120 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-09-14 18:28:01,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:28:01,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 4, 8, 4] total 11 [2018-09-14 18:28:01,327 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:28:01,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 18:28:01,328 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 18:28:01,328 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-14 18:28:01,328 INFO L87 Difference]: Start difference. First operand 255 states and 355 transitions. Second operand 9 states. [2018-09-14 18:28:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:28:01,476 INFO L93 Difference]: Finished difference Result 297 states and 411 transitions. [2018-09-14 18:28:01,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 18:28:01,477 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2018-09-14 18:28:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:28:01,479 INFO L225 Difference]: With dead ends: 297 [2018-09-14 18:28:01,479 INFO L226 Difference]: Without dead ends: 294 [2018-09-14 18:28:01,480 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 484 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-14 18:28:01,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-09-14 18:28:01,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 291. [2018-09-14 18:28:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-14 18:28:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 405 transitions. [2018-09-14 18:28:01,490 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 405 transitions. Word has length 121 [2018-09-14 18:28:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:28:01,490 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 405 transitions. [2018-09-14 18:28:01,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 18:28:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 405 transitions. [2018-09-14 18:28:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-14 18:28:01,492 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:28:01,492 INFO L376 BasicCegarLoop]: trace histogram [12, 11, 8, 8, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:28:01,492 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:28:01,492 INFO L82 PathProgramCache]: Analyzing trace with hash -363229152, now seen corresponding path program 2 times [2018-09-14 18:28:01,492 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:28:01,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:28:01,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 18:28:01,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:28:01,493 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:28:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:28:01,830 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 18:28:01,999 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 18:28:02,194 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 18:28:02,387 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 18:28:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:28:02,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:28:02,637 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 18:28:02,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 18:28:02,645 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 18:28:02,782 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 18:28:02,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 18:28:02,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:28:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:28:02,908 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:28:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 107 proven. 142 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-09-14 18:28:04,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:28:04,141 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 25 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 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 18:28:04,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 18:28:04,155 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 18:28:05,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 18:28:05,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 18:28:05,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:28:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:28:05,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:28:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 183 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-09-14 18:28:06,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:28:06,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 9, 13, 6] total 23 [2018-09-14 18:28:06,024 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:28:06,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-14 18:28:06,024 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-14 18:28:06,025 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2018-09-14 18:28:06,025 INFO L87 Difference]: Start difference. First operand 291 states and 405 transitions. Second operand 14 states. [2018-09-14 18:28:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:28:06,342 INFO L93 Difference]: Finished difference Result 294 states and 408 transitions. [2018-09-14 18:28:06,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-14 18:28:06,344 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2018-09-14 18:28:06,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:28:06,347 INFO L225 Difference]: With dead ends: 294 [2018-09-14 18:28:06,347 INFO L226 Difference]: Without dead ends: 292 [2018-09-14 18:28:06,347 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 480 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2018-09-14 18:28:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-09-14 18:28:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2018-09-14 18:28:06,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-09-14 18:28:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 406 transitions. [2018-09-14 18:28:06,357 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 406 transitions. Word has length 124 [2018-09-14 18:28:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:28:06,357 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 406 transitions. [2018-09-14 18:28:06,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-14 18:28:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 406 transitions. [2018-09-14 18:28:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-14 18:28:06,359 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:28:06,359 INFO L376 BasicCegarLoop]: trace histogram [13, 12, 9, 9, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:28:06,359 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:28:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash -730440230, now seen corresponding path program 2 times [2018-09-14 18:28:06,360 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:28:06,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:28:06,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 18:28:06,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:28:06,361 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:28:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:28:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 318 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-14 18:28:06,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:28:06,873 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 18:28:06,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 18:28:06,881 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 18:28:07,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 18:28:07,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 18:28:07,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:28:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:28:07,269 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:28:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 225 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-14 18:28:07,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:28:07,444 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 27 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 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 18:28:07,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 18:28:07,459 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 18:28:07,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 18:28:07,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 18:28:07,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:28:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 318 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-14 18:28:07,941 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:28:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 153 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-09-14 18:28:08,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:28:08,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 6, 9, 4] total 27 [2018-09-14 18:28:08,037 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:28:08,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-14 18:28:08,037 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-14 18:28:08,038 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2018-09-14 18:28:08,038 INFO L87 Difference]: Start difference. First operand 292 states and 406 transitions. Second operand 21 states. [2018-09-14 18:28:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:28:08,371 INFO L93 Difference]: Finished difference Result 335 states and 466 transitions. [2018-09-14 18:28:08,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-14 18:28:08,372 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 135 [2018-09-14 18:28:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:28:08,374 INFO L225 Difference]: With dead ends: 335 [2018-09-14 18:28:08,375 INFO L226 Difference]: Without dead ends: 331 [2018-09-14 18:28:08,375 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 526 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2018-09-14 18:28:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-09-14 18:28:08,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 328. [2018-09-14 18:28:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-14 18:28:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 457 transitions. [2018-09-14 18:28:08,387 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 457 transitions. Word has length 135 [2018-09-14 18:28:08,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:28:08,387 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 457 transitions. [2018-09-14 18:28:08,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-14 18:28:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 457 transitions. [2018-09-14 18:28:08,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-14 18:28:08,389 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 18:28:08,389 INFO L376 BasicCegarLoop]: trace histogram [14, 13, 9, 9, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 18:28:08,389 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 18:28:08,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1381697249, now seen corresponding path program 3 times [2018-09-14 18:28:08,390 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 18:28:08,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:28:08,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 18:28:08,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 18:28:08,391 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 18:28:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 18:28:08,776 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 18:28:08,930 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 18:28:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 26 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 18:28:09,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:28:09,348 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 18:28:09,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-14 18:28:09,359 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-14 18:28:09,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-14 18:28:09,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 18:28:09,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:28:09,939 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2018-09-14 18:28:10,606 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2018-09-14 18:28:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 208 proven. 26 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-14 18:28:10,847 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:28:11,348 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 22 [2018-09-14 18:28:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 208 proven. 26 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-14 18:28:12,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 18:28:12,017 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 29 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 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 18:28:12,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-14 18:28:12,032 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-14 18:28:12,689 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-14 18:28:12,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 18:28:12,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 18:28:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 209 proven. 25 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-14 18:28:13,006 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 18:28:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 208 proven. 26 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-14 18:28:13,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 18:28:13,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7, 8, 8] total 28 [2018-09-14 18:28:13,377 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 18:28:13,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-14 18:28:13,378 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-14 18:28:13,378 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2018-09-14 18:28:13,379 INFO L87 Difference]: Start difference. First operand 328 states and 457 transitions. Second operand 22 states. [2018-09-14 18:28:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 18:28:14,788 INFO L93 Difference]: Finished difference Result 348 states and 478 transitions. [2018-09-14 18:28:14,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-14 18:28:14,789 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 145 [2018-09-14 18:28:14,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 18:28:14,790 INFO L225 Difference]: With dead ends: 348 [2018-09-14 18:28:14,790 INFO L226 Difference]: Without dead ends: 0 [2018-09-14 18:28:14,793 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 575 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=255, Invalid=2295, Unknown=0, NotChecked=0, Total=2550 [2018-09-14 18:28:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-14 18:28:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-14 18:28:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-14 18:28:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-14 18:28:14,794 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 145 [2018-09-14 18:28:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 18:28:14,794 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-14 18:28:14,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-14 18:28:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-14 18:28:14,795 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-14 18:28:14,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-14 18:28:14,836 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 18:28:14,861 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 18:28:14,872 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 18:28:14,880 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 18:28:14,883 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 18:28:14,889 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 18:28:14,892 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 18:28:14,893 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 18:28:15,945 WARN L178 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 45 [2018-09-14 18:28:16,044 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-09-14 18:28:16,044 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-09-14 18:28:16,044 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-09-14 18:28:16,044 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-09-14 18:28:16,044 INFO L429 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-09-14 18:28:16,044 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-09-14 18:28:16,044 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-09-14 18:28:16,044 INFO L426 ceAbstractionStarter]: For program point mainEXIT(lines 14 566) no Hoare annotation was computed. [2018-09-14 18:28:16,044 INFO L426 ceAbstractionStarter]: For program point L498(lines 498 500) no Hoare annotation was computed. [2018-09-14 18:28:16,045 INFO L426 ceAbstractionStarter]: For program point L366(lines 366 368) no Hoare annotation was computed. [2018-09-14 18:28:16,045 INFO L426 ceAbstractionStarter]: For program point L466(lines 466 468) no Hoare annotation was computed. [2018-09-14 18:28:16,045 INFO L426 ceAbstractionStarter]: For program point mainFINAL(lines 14 566) no Hoare annotation was computed. [2018-09-14 18:28:16,045 INFO L426 ceAbstractionStarter]: For program point L39(lines 39 58) no Hoare annotation was computed. [2018-09-14 18:28:16,045 INFO L426 ceAbstractionStarter]: For program point L40(lines 40 55) no Hoare annotation was computed. [2018-09-14 18:28:16,045 INFO L426 ceAbstractionStarter]: For program point L140(lines 140 155) no Hoare annotation was computed. [2018-09-14 18:28:16,045 INFO L426 ceAbstractionStarter]: For program point L240(lines 240 255) no Hoare annotation was computed. [2018-09-14 18:28:16,045 INFO L426 ceAbstractionStarter]: For program point L108(lines 108 123) no Hoare annotation was computed. [2018-09-14 18:28:16,045 INFO L426 ceAbstractionStarter]: For program point L42(lines 42 53) no Hoare annotation was computed. [2018-09-14 18:28:16,046 INFO L426 ceAbstractionStarter]: For program point L340(lines 340 355) no Hoare annotation was computed. [2018-09-14 18:28:16,046 INFO L426 ceAbstractionStarter]: For program point L208(lines 208 223) no Hoare annotation was computed. [2018-09-14 18:28:16,046 INFO L426 ceAbstractionStarter]: For program point L142(lines 142 153) no Hoare annotation was computed. [2018-09-14 18:28:16,046 INFO L426 ceAbstractionStarter]: For program point L76(lines 76 91) no Hoare annotation was computed. [2018-09-14 18:28:16,046 INFO L426 ceAbstractionStarter]: For program point L440(lines 440 455) no Hoare annotation was computed. [2018-09-14 18:28:16,046 INFO L426 ceAbstractionStarter]: For program point L308(lines 308 323) no Hoare annotation was computed. [2018-09-14 18:28:16,046 INFO L426 ceAbstractionStarter]: For program point L242(lines 242 253) no Hoare annotation was computed. [2018-09-14 18:28:16,046 INFO L426 ceAbstractionStarter]: For program point L176(lines 176 191) no Hoare annotation was computed. [2018-09-14 18:28:16,046 INFO L426 ceAbstractionStarter]: For program point L110(lines 110 121) no Hoare annotation was computed. [2018-09-14 18:28:16,047 INFO L426 ceAbstractionStarter]: For program point L540(lines 540 555) no Hoare annotation was computed. [2018-09-14 18:28:16,047 INFO L426 ceAbstractionStarter]: For program point L408(lines 408 423) no Hoare annotation was computed. [2018-09-14 18:28:16,047 INFO L426 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 565) no Hoare annotation was computed. [2018-09-14 18:28:16,047 INFO L426 ceAbstractionStarter]: For program point L342(lines 342 353) no Hoare annotation was computed. [2018-09-14 18:28:16,047 INFO L426 ceAbstractionStarter]: For program point L276(lines 276 291) no Hoare annotation was computed. [2018-09-14 18:28:16,047 INFO L426 ceAbstractionStarter]: For program point L210(lines 210 221) no Hoare annotation was computed. [2018-09-14 18:28:16,047 INFO L426 ceAbstractionStarter]: For program point L78(lines 78 89) no Hoare annotation was computed. [2018-09-14 18:28:16,048 INFO L426 ceAbstractionStarter]: For program point L508(lines 508 523) no Hoare annotation was computed. [2018-09-14 18:28:16,048 INFO L426 ceAbstractionStarter]: For program point L442(lines 442 453) no Hoare annotation was computed. [2018-09-14 18:28:16,048 INFO L426 ceAbstractionStarter]: For program point L376(lines 376 391) no Hoare annotation was computed. [2018-09-14 18:28:16,048 INFO L426 ceAbstractionStarter]: For program point L310(lines 310 321) no Hoare annotation was computed. [2018-09-14 18:28:16,048 INFO L426 ceAbstractionStarter]: For program point L178(lines 178 189) no Hoare annotation was computed. [2018-09-14 18:28:16,048 INFO L426 ceAbstractionStarter]: For program point L46(lines 46 48) no Hoare annotation was computed. [2018-09-14 18:28:16,048 INFO L426 ceAbstractionStarter]: For program point L542(lines 542 553) no Hoare annotation was computed. [2018-09-14 18:28:16,048 INFO L426 ceAbstractionStarter]: For program point L476(lines 476 491) no Hoare annotation was computed. [2018-09-14 18:28:16,048 INFO L426 ceAbstractionStarter]: For program point L410(lines 410 421) no Hoare annotation was computed. [2018-09-14 18:28:16,049 INFO L426 ceAbstractionStarter]: For program point L278(lines 278 289) no Hoare annotation was computed. [2018-09-14 18:28:16,049 INFO L426 ceAbstractionStarter]: For program point L146(lines 146 148) no Hoare annotation was computed. [2018-09-14 18:28:16,049 INFO L426 ceAbstractionStarter]: For program point L510(lines 510 521) no Hoare annotation was computed. [2018-09-14 18:28:16,049 INFO L426 ceAbstractionStarter]: For program point L378(lines 378 389) no Hoare annotation was computed. [2018-09-14 18:28:16,049 INFO L426 ceAbstractionStarter]: For program point L246(lines 246 248) no Hoare annotation was computed. [2018-09-14 18:28:16,049 INFO L426 ceAbstractionStarter]: For program point L114(lines 114 116) no Hoare annotation was computed. [2018-09-14 18:28:16,049 INFO L426 ceAbstractionStarter]: For program point L478(lines 478 489) no Hoare annotation was computed. [2018-09-14 18:28:16,049 INFO L426 ceAbstractionStarter]: For program point L346(lines 346 348) no Hoare annotation was computed. [2018-09-14 18:28:16,049 INFO L426 ceAbstractionStarter]: For program point L214(lines 214 216) no Hoare annotation was computed. [2018-09-14 18:28:16,050 INFO L426 ceAbstractionStarter]: For program point L82(lines 82 84) no Hoare annotation was computed. [2018-09-14 18:28:16,050 INFO L426 ceAbstractionStarter]: For program point L446(lines 446 448) no Hoare annotation was computed. [2018-09-14 18:28:16,050 INFO L426 ceAbstractionStarter]: For program point L314(lines 314 316) no Hoare annotation was computed. [2018-09-14 18:28:16,050 INFO L426 ceAbstractionStarter]: For program point L182(lines 182 184) no Hoare annotation was computed. [2018-09-14 18:28:16,050 INFO L426 ceAbstractionStarter]: For program point L546(lines 546 548) no Hoare annotation was computed. [2018-09-14 18:28:16,050 INFO L426 ceAbstractionStarter]: For program point L414(lines 414 416) no Hoare annotation was computed. [2018-09-14 18:28:16,050 INFO L426 ceAbstractionStarter]: For program point L282(lines 282 284) no Hoare annotation was computed. [2018-09-14 18:28:16,050 INFO L422 ceAbstractionStarter]: At program point L547(lines 14 566) the Hoare annotation is: false [2018-09-14 18:28:16,050 INFO L426 ceAbstractionStarter]: For program point L514(lines 514 516) no Hoare annotation was computed. [2018-09-14 18:28:16,051 INFO L426 ceAbstractionStarter]: For program point L382(lines 382 384) no Hoare annotation was computed. [2018-09-14 18:28:16,051 INFO L426 ceAbstractionStarter]: For program point L482(lines 482 484) no Hoare annotation was computed. [2018-09-14 18:28:16,051 INFO L422 ceAbstractionStarter]: At program point L24-3(lines 24 561) the Hoare annotation is: (let ((.cse0 (<= main_~this_buffer_empty~0 0)) (.cse1 (<= 0 main_~this_buffer_empty~0))) (or (and (<= main_~this_expect~0 0) (<= 0 main_~this_expect~0) (= main_~q~0 0) .cse0 .cse1) (and (exists ((main_~P1~0 Int)) (let ((.cse2 (mod main_~P1~0 2))) (and (= .cse2 0) (= .cse2 (mod main_~this_expect~0 2))))) (<= 5 main_~q~0) (<= 0 (+ main_~P8~0 2147483648)) (<= main_~P8~0 2147483647) .cse0 .cse1))) [2018-09-14 18:28:16,051 INFO L426 ceAbstractionStarter]: For program point L24-4(lines 24 561) no Hoare annotation was computed. [2018-09-14 18:28:16,051 INFO L426 ceAbstractionStarter]: For program point L124(lines 124 139) no Hoare annotation was computed. [2018-09-14 18:28:16,051 INFO L426 ceAbstractionStarter]: For program point L224(lines 224 239) no Hoare annotation was computed. [2018-09-14 18:28:16,051 INFO L426 ceAbstractionStarter]: For program point L92(lines 92 107) no Hoare annotation was computed. [2018-09-14 18:28:16,051 INFO L426 ceAbstractionStarter]: For program point L59(lines 59 158) no Hoare annotation was computed. [2018-09-14 18:28:16,052 INFO L426 ceAbstractionStarter]: For program point L324(lines 324 339) no Hoare annotation was computed. [2018-09-14 18:28:16,052 INFO L426 ceAbstractionStarter]: For program point L192(lines 192 207) no Hoare annotation was computed. [2018-09-14 18:28:16,052 INFO L426 ceAbstractionStarter]: For program point L159(lines 159 258) no Hoare annotation was computed. [2018-09-14 18:28:16,052 INFO L426 ceAbstractionStarter]: For program point L126(lines 126 137) no Hoare annotation was computed. [2018-09-14 18:28:16,052 INFO L426 ceAbstractionStarter]: For program point L60(lines 60 75) no Hoare annotation was computed. [2018-09-14 18:28:16,052 INFO L426 ceAbstractionStarter]: For program point L424(lines 424 439) no Hoare annotation was computed. [2018-09-14 18:28:16,052 INFO L426 ceAbstractionStarter]: For program point L292(lines 292 307) no Hoare annotation was computed. [2018-09-14 18:28:16,052 INFO L426 ceAbstractionStarter]: For program point L259(lines 259 358) no Hoare annotation was computed. [2018-09-14 18:28:16,052 INFO L426 ceAbstractionStarter]: For program point L226(lines 226 237) no Hoare annotation was computed. [2018-09-14 18:28:16,053 INFO L426 ceAbstractionStarter]: For program point L160(lines 160 175) no Hoare annotation was computed. [2018-09-14 18:28:16,053 INFO L426 ceAbstractionStarter]: For program point L94(lines 94 105) no Hoare annotation was computed. [2018-09-14 18:28:16,053 INFO L422 ceAbstractionStarter]: At program point L557(lines 24 561) the Hoare annotation is: (let ((.cse3 (<= main_~this_buffer_empty~0 1)) (.cse5 (<= 1 main_~this_buffer_empty~0)) (.cse7 (exists ((main_~P1~0 Int)) (let ((.cse8 (mod main_~P1~0 2))) (and (= .cse8 0) (= .cse8 (mod main_~this_expect~0 2)))))) (.cse4 (<= 0 (+ main_~P8~0 2147483648))) (.cse6 (<= main_~P8~0 2147483647)) (.cse0 (<= main_~this_buffer_empty~0 0)) (.cse1 (<= 0 main_~this_buffer_empty~0))) (or (and (<= main_~this_expect~0 0) (= main_~q~0 0) (<= 0 main_~this_expect~0) .cse0 .cse1) (and (exists ((main_~P1~0 Int)) (let ((.cse2 (mod main_~P1~0 2))) (and (= .cse2 0) (= .cse2 (mod (+ main_~this_expect~0 1) 2))))) .cse3 .cse4 .cse5 (= main_~q~0 4) .cse6) (and (= 0 (mod (+ main_~this_expect~0 1) 2)) .cse4 (= main_~q~0 3) .cse6 .cse0 .cse1) (and .cse7 (= main_~q~0 1) .cse3 .cse4 .cse5 .cse6) (and .cse7 (<= 5 main_~q~0) .cse4 .cse6 .cse0 .cse1))) [2018-09-14 18:28:16,053 INFO L426 ceAbstractionStarter]: For program point L524(lines 524 539) no Hoare annotation was computed. [2018-09-14 18:28:16,053 INFO L426 ceAbstractionStarter]: For program point L392(lines 392 407) no Hoare annotation was computed. [2018-09-14 18:28:16,053 INFO L426 ceAbstractionStarter]: For program point L359(lines 359 458) no Hoare annotation was computed. [2018-09-14 18:28:16,053 INFO L426 ceAbstractionStarter]: For program point L326(lines 326 337) no Hoare annotation was computed. [2018-09-14 18:28:16,053 INFO L426 ceAbstractionStarter]: For program point L260(lines 260 275) no Hoare annotation was computed. [2018-09-14 18:28:16,053 INFO L426 ceAbstractionStarter]: For program point L194(lines 194 205) no Hoare annotation was computed. [2018-09-14 18:28:16,054 INFO L426 ceAbstractionStarter]: For program point L62(lines 62 73) no Hoare annotation was computed. [2018-09-14 18:28:16,054 INFO L426 ceAbstractionStarter]: For program point L492(lines 492 507) no Hoare annotation was computed. [2018-09-14 18:28:16,054 INFO L426 ceAbstractionStarter]: For program point L459(lines 459 558) no Hoare annotation was computed. [2018-09-14 18:28:16,054 INFO L426 ceAbstractionStarter]: For program point L426(lines 426 437) no Hoare annotation was computed. [2018-09-14 18:28:16,054 INFO L426 ceAbstractionStarter]: For program point L360(lines 360 375) no Hoare annotation was computed. [2018-09-14 18:28:16,054 INFO L426 ceAbstractionStarter]: For program point L294(lines 294 305) no Hoare annotation was computed. [2018-09-14 18:28:16,054 INFO L426 ceAbstractionStarter]: For program point L162(lines 162 173) no Hoare annotation was computed. [2018-09-14 18:28:16,054 INFO L429 ceAbstractionStarter]: At program point mainENTRY(lines 14 566) the Hoare annotation is: true [2018-09-14 18:28:16,054 INFO L426 ceAbstractionStarter]: For program point L526(lines 526 537) no Hoare annotation was computed. [2018-09-14 18:28:16,054 INFO L426 ceAbstractionStarter]: For program point L460(lines 460 475) no Hoare annotation was computed. [2018-09-14 18:28:16,054 INFO L426 ceAbstractionStarter]: For program point L394(lines 394 405) no Hoare annotation was computed. [2018-09-14 18:28:16,054 INFO L426 ceAbstractionStarter]: For program point L262(lines 262 273) no Hoare annotation was computed. [2018-09-14 18:28:16,055 INFO L426 ceAbstractionStarter]: For program point L130(lines 130 132) no Hoare annotation was computed. [2018-09-14 18:28:16,055 INFO L426 ceAbstractionStarter]: For program point L494(lines 494 505) no Hoare annotation was computed. [2018-09-14 18:28:16,055 INFO L426 ceAbstractionStarter]: For program point L362(lines 362 373) no Hoare annotation was computed. [2018-09-14 18:28:16,055 INFO L426 ceAbstractionStarter]: For program point L230(lines 230 232) no Hoare annotation was computed. [2018-09-14 18:28:16,055 INFO L426 ceAbstractionStarter]: For program point L98(lines 98 100) no Hoare annotation was computed. [2018-09-14 18:28:16,055 INFO L426 ceAbstractionStarter]: For program point L462(lines 462 473) no Hoare annotation was computed. [2018-09-14 18:28:16,055 INFO L426 ceAbstractionStarter]: For program point L330(lines 330 332) no Hoare annotation was computed. [2018-09-14 18:28:16,055 INFO L426 ceAbstractionStarter]: For program point L198(lines 198 200) no Hoare annotation was computed. [2018-09-14 18:28:16,055 INFO L426 ceAbstractionStarter]: For program point L66(lines 66 68) no Hoare annotation was computed. [2018-09-14 18:28:16,056 INFO L426 ceAbstractionStarter]: For program point L430(lines 430 432) no Hoare annotation was computed. [2018-09-14 18:28:16,056 INFO L426 ceAbstractionStarter]: For program point L298(lines 298 300) no Hoare annotation was computed. [2018-09-14 18:28:16,056 INFO L426 ceAbstractionStarter]: For program point L166(lines 166 168) no Hoare annotation was computed. [2018-09-14 18:28:16,056 INFO L426 ceAbstractionStarter]: For program point L530(lines 530 532) no Hoare annotation was computed. [2018-09-14 18:28:16,056 INFO L426 ceAbstractionStarter]: For program point L398(lines 398 400) no Hoare annotation was computed. [2018-09-14 18:28:16,056 INFO L426 ceAbstractionStarter]: For program point L266(lines 266 268) no Hoare annotation was computed. [2018-09-14 18:28:16,063 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,064 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,064 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,064 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,065 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,065 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,075 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,076 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,076 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,076 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,077 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,077 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,082 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,082 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,083 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,083 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 06:28:16 BoogieIcfgContainer [2018-09-14 18:28:16,086 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 18:28:16,090 INFO L168 Benchmark]: Toolchain (without parser) took 47298.38 ms. Allocated memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -577.5 MB). Peak memory consumption was 564.9 MB. Max. memory is 7.1 GB. [2018-09-14 18:28:16,095 INFO L168 Benchmark]: CDTParser took 0.18 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. [2018-09-14 18:28:16,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 580.85 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-14 18:28:16,097 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 18:28:16,097 INFO L168 Benchmark]: Boogie Preprocessor took 81.47 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. [2018-09-14 18:28:16,098 INFO L168 Benchmark]: RCFGBuilder took 1959.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -776.0 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2018-09-14 18:28:16,099 INFO L168 Benchmark]: TraceAbstraction took 44618.91 ms. Allocated memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: 391.1 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 166.8 MB). Peak memory consumption was 557.9 MB. Max. memory is 7.1 GB. [2018-09-14 18:28:16,108 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 580.85 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 81.47 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. * RCFGBuilder took 1959.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -776.0 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 44618.91 ms. Allocated memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: 391.1 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 166.8 MB). Peak memory consumption was 557.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 565]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant [2018-09-14 18:28:16,123 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,123 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,127 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,127 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,127 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,127 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,133 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,134 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,134 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,134 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,134 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,136 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] Derived loop invariant: (((((((this_expect <= 0 && q == 0) && 0 <= this_expect) && this_buffer_empty <= 0) && 0 <= this_buffer_empty) || ((((((\exists main_~P1~0 : int :: main_~P1~0 % 2 == 0 && main_~P1~0 % 2 == (this_expect + 1) % 2) && this_buffer_empty <= 1) && 0 <= P8 + 2147483648) && 1 <= this_buffer_empty) && q == 4) && P8 <= 2147483647)) || (((((0 == (this_expect + 1) % 2 && 0 <= P8 + 2147483648) && q == 3) && P8 <= 2147483647) && this_buffer_empty <= 0) && 0 <= this_buffer_empty)) || ((((((\exists main_~P1~0 : int :: main_~P1~0 % 2 == 0 && main_~P1~0 % 2 == this_expect % 2) && q == 1) && this_buffer_empty <= 1) && 0 <= P8 + 2147483648) && 1 <= this_buffer_empty) && P8 <= 2147483647)) || ((((((\exists main_~P1~0 : int :: main_~P1~0 % 2 == 0 && main_~P1~0 % 2 == this_expect % 2) && 5 <= q) && 0 <= P8 + 2147483648) && P8 <= 2147483647) && this_buffer_empty <= 0) && 0 <= this_buffer_empty) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 24]: Loop Invariant [2018-09-14 18:28:16,138 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,138 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,139 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-14 18:28:16,139 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] Derived loop invariant: ((((this_expect <= 0 && 0 <= this_expect) && q == 0) && this_buffer_empty <= 0) && 0 <= this_buffer_empty) || ((((((\exists main_~P1~0 : int :: main_~P1~0 % 2 == 0 && main_~P1~0 % 2 == this_expect % 2) && 5 <= q) && 0 <= P8 + 2147483648) && P8 <= 2147483647) && this_buffer_empty <= 0) && 0 <= this_buffer_empty) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 114 locations, 1 error locations. SAFE Result, 44.5s OverallTime, 24 OverallIterations, 14 TraceHistogramMax, 8.4s AutomataDifference, 0.0s DeadEndRemovalTime, 1.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 4505 SDtfs, 2827 SDslu, 23008 SDs, 0 SdLazy, 2578 SolverSat, 180 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4695 GetRequests, 4399 SyntacticMatches, 61 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 21.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=328occurred in iteration=23, 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: 0.3s AutomataMinimizationTime, 24 MinimizatonAttempts, 83 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 49 NumberOfFragments, 194 HoareAnnotationTreeSize, 7 FomulaSimplifications, 3418 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 702 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 6.7s SatisfiabilityAnalysisTime, 25.8s InterpolantComputationTime, 3659 NumberOfCodeBlocks, 3491 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 5834 ConstructedInterpolants, 1245 QuantifiedInterpolants, 8189772 SizeOfPredicates, 123 NumberOfNonLiveVariables, 14032 ConjunctsInSsa, 688 ConjunctsInUnsatCore, 80 InterpolantComputations, 12 PerfectInterpolantSequences, 3991/10453 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_18-28-16-152.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_18-28-16-152.csv Received shutdown request...