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/loop-new/count_by_k_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:17:52,361 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:17:52,363 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:17:52,384 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:17:52,384 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:17:52,386 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:17:52,387 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:17:52,391 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:17:52,394 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:17:52,396 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:17:52,397 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:17:52,397 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:17:52,400 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:17:52,401 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:17:52,402 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:17:52,411 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:17:52,412 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:17:52,417 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:17:52,419 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:17:52,421 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:17:52,422 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:17:52,423 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:17:52,425 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:17:52,425 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:17:52,425 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:17:52,426 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:17:52,427 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:17:52,428 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:17:52,429 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:17:52,430 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:17:52,430 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:17:52,431 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-10 10:17:52,434 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 [2018-09-10 10:17:52,449 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:17:52,449 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:17:52,450 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:17:52,450 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:17:52,451 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:17:52,451 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:17:52,451 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:17:52,451 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:17:52,451 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:17:52,452 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:17:52,452 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:17:52,453 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:17:52,453 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:17:52,456 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:17:52,456 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:17:52,456 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:17:52,457 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:17:52,457 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:17:52,457 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:17:52,457 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:17:52,457 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:17:52,458 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:17:52,458 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:17:52,458 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:17:52,458 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:17:52,460 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:17:52,460 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:17:52,460 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:17:52,460 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:17:52,460 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:17:52,461 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:17:52,461 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:17:52,461 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:17:52,517 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:17:52,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:17:52,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:17:52,539 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:17:52,539 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:17:52,540 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_k_true-unreach-call_true-termination.i [2018-09-10 10:17:52,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7064fb6ac/268371082f0a48cfba220441d562dba2/FLAGc6094a61a [2018-09-10 10:17:53,069 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:17:53,070 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k_true-unreach-call_true-termination.i [2018-09-10 10:17:53,077 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7064fb6ac/268371082f0a48cfba220441d562dba2/FLAGc6094a61a [2018-09-10 10:17:53,092 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7064fb6ac/268371082f0a48cfba220441d562dba2 [2018-09-10 10:17:53,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:17:53,105 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:17:53,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:17:53,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:17:53,113 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:17:53,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:17:53" (1/1) ... [2018-09-10 10:17:53,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eb8563f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53, skipping insertion in model container [2018-09-10 10:17:53,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:17:53" (1/1) ... [2018-09-10 10:17:53,293 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:17:53,327 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:17:53,343 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:17:53,347 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:17:53,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53 WrapperNode [2018-09-10 10:17:53,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:17:53,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:17:53,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:17:53,360 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:17:53,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53" (1/1) ... [2018-09-10 10:17:53,375 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53" (1/1) ... [2018-09-10 10:17:53,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:17:53,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:17:53,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:17:53,381 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:17:53,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53" (1/1) ... [2018-09-10 10:17:53,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53" (1/1) ... [2018-09-10 10:17:53,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53" (1/1) ... [2018-09-10 10:17:53,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53" (1/1) ... [2018-09-10 10:17:53,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53" (1/1) ... [2018-09-10 10:17:53,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53" (1/1) ... [2018-09-10 10:17:53,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53" (1/1) ... [2018-09-10 10:17:53,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:17:53,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:17:53,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:17:53,402 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:17:53,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53" (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 [2018-09-10 10:17:53,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:17:53,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:17:53,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:17:53,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:17:53,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:17:53,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:17:53,456 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assert [2018-09-10 10:17:53,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assert [2018-09-10 10:17:53,725 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:17:53,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:17:53 BoogieIcfgContainer [2018-09-10 10:17:53,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:17:53,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:17:53,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:17:53,730 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:17:53,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:17:53" (1/3) ... [2018-09-10 10:17:53,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4608bdad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:17:53, skipping insertion in model container [2018-09-10 10:17:53,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:17:53" (2/3) ... [2018-09-10 10:17:53,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4608bdad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:17:53, skipping insertion in model container [2018-09-10 10:17:53,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:17:53" (3/3) ... [2018-09-10 10:17:53,734 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k_true-unreach-call_true-termination.i [2018-09-10 10:17:53,744 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:17:53,753 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:17:53,819 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:17:53,820 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:17:53,821 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:17:53,821 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:17:53,821 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:17:53,821 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:17:53,822 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:17:53,822 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:17:53,822 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:17:53,845 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-09-10 10:17:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-10 10:17:53,852 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:17:53,853 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:17:53,854 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:17:53,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1152414567, now seen corresponding path program 1 times [2018-09-10 10:17:53,863 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:17:53,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:53,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:17:53,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:53,920 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:17:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:17:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:53,988 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:17:53,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-10 10:17:53,989 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:17:53,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-10 10:17:54,006 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-10 10:17:54,006 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-10 10:17:54,009 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-09-10 10:17:54,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:17:54,032 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-09-10 10:17:54,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-10 10:17:54,034 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-09-10 10:17:54,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:17:54,044 INFO L225 Difference]: With dead ends: 33 [2018-09-10 10:17:54,044 INFO L226 Difference]: Without dead ends: 14 [2018-09-10 10:17:54,048 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 [2018-09-10 10:17:54,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-10 10:17:54,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-10 10:17:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-10 10:17:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-10 10:17:54,087 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-10 10:17:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:17:54,088 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-10 10:17:54,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-10 10:17:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-10 10:17:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-10 10:17:54,089 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:17:54,089 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:17:54,089 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:17:54,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1083883255, now seen corresponding path program 1 times [2018-09-10 10:17:54,090 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:17:54,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:54,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:17:54,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:54,092 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:17:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:17:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:54,345 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:17:54,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:17:54,345 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:17:54,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:17:54,347 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:17:54,347 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:17:54,348 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-09-10 10:17:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:17:54,449 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-10 10:17:54,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:17:54,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-09-10 10:17:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:17:54,450 INFO L225 Difference]: With dead ends: 21 [2018-09-10 10:17:54,450 INFO L226 Difference]: Without dead ends: 16 [2018-09-10 10:17:54,452 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:17:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-10 10:17:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-10 10:17:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-10 10:17:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-10 10:17:54,457 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2018-09-10 10:17:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:17:54,457 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-10 10:17:54,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:17:54,457 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-10 10:17:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-10 10:17:54,459 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:17:54,459 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:17:54,460 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:17:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1128913667, now seen corresponding path program 1 times [2018-09-10 10:17:54,460 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:17:54,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:54,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:17:54,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:54,462 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:17:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:17:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:54,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:17:54,575 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 [2018-09-10 10:17:54,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:17:54,586 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:17:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:17:54,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:17:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:54,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:17:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:55,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:17:55,060 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 [2018-09-10 10:17:55,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:17:55,077 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:17:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:17:55,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:17:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:55,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:17:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:55,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:17:55,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-09-10 10:17:55,186 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:17:55,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 10:17:55,187 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 10:17:55,188 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:17:55,188 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2018-09-10 10:17:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:17:55,333 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-09-10 10:17:55,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:17:55,334 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-09-10 10:17:55,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:17:55,335 INFO L225 Difference]: With dead ends: 30 [2018-09-10 10:17:55,335 INFO L226 Difference]: Without dead ends: 25 [2018-09-10 10:17:55,336 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:17:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-10 10:17:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-10 10:17:55,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-10 10:17:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-10 10:17:55,349 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 15 [2018-09-10 10:17:55,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:17:55,349 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-10 10:17:55,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 10:17:55,349 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-10 10:17:55,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-10 10:17:55,351 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:17:55,351 INFO L376 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:17:55,351 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:17:55,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1437681655, now seen corresponding path program 2 times [2018-09-10 10:17:55,351 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:17:55,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:55,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:17:55,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:55,353 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:17:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:17:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:55,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:17:55,570 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 [2018-09-10 10:17:55,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 10:17:55,582 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:17:55,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 10:17:55,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:17:55,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:17:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:55,776 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:17:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:56,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:17:56,295 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:17:56,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 10:17:56,313 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:17:56,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 10:17:56,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:17:56,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:17:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:56,344 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:17:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:56,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:17:56,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 14 [2018-09-10 10:17:56,415 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:17:56,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-10 10:17:56,415 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-10 10:17:56,416 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-09-10 10:17:56,416 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2018-09-10 10:17:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:17:56,733 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-09-10 10:17:56,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 10:17:56,734 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-09-10 10:17:56,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:17:56,735 INFO L225 Difference]: With dead ends: 39 [2018-09-10 10:17:56,735 INFO L226 Difference]: Without dead ends: 34 [2018-09-10 10:17:56,736 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2018-09-10 10:17:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-10 10:17:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-10 10:17:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-10 10:17:56,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-10 10:17:56,743 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2018-09-10 10:17:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:17:56,743 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-10 10:17:56,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-10 10:17:56,744 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-10 10:17:56,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-10 10:17:56,745 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:17:56,745 INFO L376 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:17:56,745 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:17:56,746 INFO L82 PathProgramCache]: Analyzing trace with hash -656200317, now seen corresponding path program 3 times [2018-09-10 10:17:56,746 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:17:56,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:56,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:17:56,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:56,747 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:17:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:17:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:56,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:17:56,962 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 [2018-09-10 10:17:56,970 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-10 10:17:56,970 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-10 10:17:57,011 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-10 10:17:57,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:17:57,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:17:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:57,089 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:17:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:57,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:17:57,411 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 [2018-09-10 10:17:57,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-10 10:17:57,427 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-10 10:17:57,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-10 10:17:57,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:17:57,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:17:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:57,486 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:17:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:57,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:17:57,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 20 [2018-09-10 10:17:57,558 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:17:57,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 10:17:57,559 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 10:17:57,559 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2018-09-10 10:17:57,559 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 13 states. [2018-09-10 10:17:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:17:57,924 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-09-10 10:17:57,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-10 10:17:57,926 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2018-09-10 10:17:57,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:17:57,928 INFO L225 Difference]: With dead ends: 48 [2018-09-10 10:17:57,928 INFO L226 Difference]: Without dead ends: 43 [2018-09-10 10:17:57,929 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2018-09-10 10:17:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-10 10:17:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-10 10:17:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-10 10:17:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-10 10:17:57,936 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 33 [2018-09-10 10:17:57,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:17:57,937 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-10 10:17:57,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 10:17:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-10 10:17:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-10 10:17:57,938 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:17:57,938 INFO L376 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:17:57,939 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:17:57,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1490238089, now seen corresponding path program 4 times [2018-09-10 10:17:57,939 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:17:57,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:57,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:17:57,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:57,941 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:17:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:17:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:58,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:17:58,525 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 [2018-09-10 10:17:58,532 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-10 10:17:58,532 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-10 10:17:58,545 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-10 10:17:58,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:17:58,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:17:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:58,640 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:17:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:59,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:17:59,135 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 [2018-09-10 10:17:59,157 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-10 10:17:59,157 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-10 10:17:59,189 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-10 10:17:59,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:17:59,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:17:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:59,223 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:17:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:17:59,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:17:59,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14] total 26 [2018-09-10 10:17:59,513 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:17:59,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-10 10:17:59,515 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-10 10:17:59,515 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2018-09-10 10:17:59,515 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 16 states. [2018-09-10 10:18:00,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:18:00,529 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-09-10 10:18:00,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-10 10:18:00,530 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-09-10 10:18:00,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:18:00,531 INFO L225 Difference]: With dead ends: 57 [2018-09-10 10:18:00,531 INFO L226 Difference]: Without dead ends: 52 [2018-09-10 10:18:00,532 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 152 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2018-09-10 10:18:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-10 10:18:00,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-10 10:18:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-10 10:18:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-10 10:18:00,540 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 42 [2018-09-10 10:18:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:18:00,540 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-10 10:18:00,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-10 10:18:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-10 10:18:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-10 10:18:00,542 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:18:00,542 INFO L376 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:18:00,543 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:18:00,543 INFO L82 PathProgramCache]: Analyzing trace with hash 45932547, now seen corresponding path program 5 times [2018-09-10 10:18:00,543 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:18:00,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:00,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:18:00,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:00,545 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:18:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:01,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:01,115 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 [2018-09-10 10:18:01,124 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-10 10:18:01,124 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:18:01,151 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-10 10:18:01,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:01,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:01,242 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:01,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:01,726 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 [2018-09-10 10:18:01,741 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-10 10:18:01,741 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:18:01,805 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-10 10:18:01,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:01,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:01,826 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:02,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:18:02,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17] total 32 [2018-09-10 10:18:02,036 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:18:02,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-10 10:18:02,037 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-10 10:18:02,039 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2018-09-10 10:18:02,040 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 19 states. [2018-09-10 10:18:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:18:02,726 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-09-10 10:18:02,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-10 10:18:02,728 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2018-09-10 10:18:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:18:02,729 INFO L225 Difference]: With dead ends: 66 [2018-09-10 10:18:02,730 INFO L226 Difference]: Without dead ends: 61 [2018-09-10 10:18:02,731 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 185 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=766, Invalid=1396, Unknown=0, NotChecked=0, Total=2162 [2018-09-10 10:18:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-10 10:18:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-10 10:18:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-10 10:18:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-10 10:18:02,739 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 51 [2018-09-10 10:18:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:18:02,739 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-10 10:18:02,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-10 10:18:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-10 10:18:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-10 10:18:02,741 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:18:02,741 INFO L376 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:18:02,742 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:18:02,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1227627785, now seen corresponding path program 6 times [2018-09-10 10:18:02,742 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:18:02,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:02,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:18:02,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:02,743 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:18:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:03,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:03,767 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 [2018-09-10 10:18:03,775 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-10 10:18:03,776 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-09-10 10:18:03,827 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-10 10:18:03,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:03,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:03,994 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:04,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:04,855 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 [2018-09-10 10:18:04,871 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-10 10:18:04,871 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-09-10 10:18:04,966 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-10 10:18:04,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:04,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:04,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:05,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:18:05,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20] total 38 [2018-09-10 10:18:05,080 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:18:05,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-10 10:18:05,081 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-10 10:18:05,081 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=936, Unknown=0, NotChecked=0, Total=1406 [2018-09-10 10:18:05,082 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 22 states. [2018-09-10 10:18:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:18:05,962 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-09-10 10:18:05,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-10 10:18:05,965 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2018-09-10 10:18:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:18:05,966 INFO L225 Difference]: With dead ends: 75 [2018-09-10 10:18:05,966 INFO L226 Difference]: Without dead ends: 70 [2018-09-10 10:18:05,968 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1105, Invalid=1975, Unknown=0, NotChecked=0, Total=3080 [2018-09-10 10:18:05,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-10 10:18:05,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-10 10:18:05,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-10 10:18:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-10 10:18:05,976 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 60 [2018-09-10 10:18:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:18:05,978 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-10 10:18:05,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-10 10:18:05,978 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-10 10:18:05,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-10 10:18:05,980 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:18:05,980 INFO L376 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:18:05,981 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:18:05,981 INFO L82 PathProgramCache]: Analyzing trace with hash 360641155, now seen corresponding path program 7 times [2018-09-10 10:18:05,981 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:18:05,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:05,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:18:05,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:05,982 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:18:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:06,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:06,566 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 [2018-09-10 10:18:06,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:18:06,573 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:18:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:06,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:06,817 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:07,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:07,680 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 [2018-09-10 10:18:07,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:18:07,695 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:18:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:07,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:07,758 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:08,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:18:08,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 23] total 44 [2018-09-10 10:18:08,070 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:18:08,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-10 10:18:08,071 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-10 10:18:08,072 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=1251, Unknown=0, NotChecked=0, Total=1892 [2018-09-10 10:18:08,073 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 25 states. [2018-09-10 10:18:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:18:09,213 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-10 10:18:09,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-10 10:18:09,216 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2018-09-10 10:18:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:18:09,217 INFO L225 Difference]: With dead ends: 84 [2018-09-10 10:18:09,217 INFO L226 Difference]: Without dead ends: 79 [2018-09-10 10:18:09,218 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 251 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1507, Invalid=2653, Unknown=0, NotChecked=0, Total=4160 [2018-09-10 10:18:09,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-10 10:18:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-10 10:18:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-10 10:18:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-10 10:18:09,226 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 69 [2018-09-10 10:18:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:18:09,227 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-10 10:18:09,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-10 10:18:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-10 10:18:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-10 10:18:09,228 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:18:09,228 INFO L376 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:18:09,229 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:18:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash -318857097, now seen corresponding path program 8 times [2018-09-10 10:18:09,229 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:18:09,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:09,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:18:09,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:09,230 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:18:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:09,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:09,966 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 [2018-09-10 10:18:09,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 10:18:09,974 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:18:10,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 10:18:10,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:10,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:10,110 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:11,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:11,260 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-09-10 10:18:11,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 10:18:11,276 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:18:11,320 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 10:18:11,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:11,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:11,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:11,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:18:11,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 26] total 55 [2018-09-10 10:18:11,609 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:18:11,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-10 10:18:11,610 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-10 10:18:11,611 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=982, Invalid=1988, Unknown=0, NotChecked=0, Total=2970 [2018-09-10 10:18:11,612 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 28 states. [2018-09-10 10:18:12,204 WARN L175 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 11 [2018-09-10 10:18:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:18:13,215 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-09-10 10:18:13,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-10 10:18:13,215 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 78 [2018-09-10 10:18:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:18:13,216 INFO L225 Difference]: With dead ends: 93 [2018-09-10 10:18:13,216 INFO L226 Difference]: Without dead ends: 88 [2018-09-10 10:18:13,219 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2153, Invalid=3853, Unknown=0, NotChecked=0, Total=6006 [2018-09-10 10:18:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-10 10:18:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-10 10:18:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-10 10:18:13,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-10 10:18:13,228 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 78 [2018-09-10 10:18:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:18:13,229 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-10 10:18:13,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-10 10:18:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-10 10:18:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-10 10:18:13,230 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:18:13,231 INFO L376 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:18:13,231 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:18:13,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1949211389, now seen corresponding path program 9 times [2018-09-10 10:18:13,231 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:18:13,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:13,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:18:13,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:13,232 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:18:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:13,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:13,949 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 [2018-09-10 10:18:13,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-10 10:18:13,962 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-10 10:18:13,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-09-10 10:18:13,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:13,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:15,513 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:17,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:17,038 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 [2018-09-10 10:18:17,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-10 10:18:17,053 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-10 10:18:17,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-09-10 10:18:17,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:17,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:17,241 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:17,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:18:17,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29, 29, 29] total 56 [2018-09-10 10:18:17,388 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:18:17,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-10 10:18:17,389 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-10 10:18:17,390 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1064, Invalid=2016, Unknown=0, NotChecked=0, Total=3080 [2018-09-10 10:18:17,390 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 31 states. [2018-09-10 10:18:18,052 WARN L175 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 11 [2018-09-10 10:18:18,360 WARN L175 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 11 [2018-09-10 10:18:19,502 WARN L175 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-09-10 10:18:19,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:18:19,708 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-09-10 10:18:19,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-10 10:18:19,708 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 87 [2018-09-10 10:18:19,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:18:19,710 INFO L225 Difference]: With dead ends: 102 [2018-09-10 10:18:19,710 INFO L226 Difference]: Without dead ends: 97 [2018-09-10 10:18:19,713 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 317 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2500, Invalid=4306, Unknown=0, NotChecked=0, Total=6806 [2018-09-10 10:18:19,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-10 10:18:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-10 10:18:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-10 10:18:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-10 10:18:19,721 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 87 [2018-09-10 10:18:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:18:19,721 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-10 10:18:19,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-10 10:18:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-10 10:18:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-10 10:18:19,723 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:18:19,723 INFO L376 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:18:19,723 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:18:19,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1275395575, now seen corresponding path program 10 times [2018-09-10 10:18:19,724 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:18:19,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:19,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:18:19,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:19,725 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:18:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:20,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:20,529 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 10:18:20,536 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-10 10:18:20,536 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-10 10:18:20,574 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-10 10:18:20,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:20,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:20,696 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:21,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:21,997 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 [2018-09-10 10:18:22,018 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-10 10:18:22,018 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-10 10:18:22,060 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-10 10:18:22,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:22,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:22,499 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:22,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:18:22,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32, 32, 32] total 81 [2018-09-10 10:18:22,988 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:18:22,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-10 10:18:22,989 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-10 10:18:22,990 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1909, Invalid=4571, Unknown=0, NotChecked=0, Total=6480 [2018-09-10 10:18:22,991 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 34 states. [2018-09-10 10:18:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:18:25,429 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-09-10 10:18:25,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-10 10:18:25,430 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 96 [2018-09-10 10:18:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:18:25,431 INFO L225 Difference]: With dead ends: 111 [2018-09-10 10:18:25,431 INFO L226 Difference]: Without dead ends: 106 [2018-09-10 10:18:25,434 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 330 SyntacticMatches, 6 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3944, Invalid=8046, Unknown=0, NotChecked=0, Total=11990 [2018-09-10 10:18:25,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-10 10:18:25,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-10 10:18:25,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-10 10:18:25,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-10 10:18:25,442 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 96 [2018-09-10 10:18:25,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:18:25,442 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-10 10:18:25,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-10 10:18:25,443 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-10 10:18:25,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-10 10:18:25,444 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:18:25,444 INFO L376 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:18:25,444 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:18:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2040776829, now seen corresponding path program 11 times [2018-09-10 10:18:25,445 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:18:25,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:25,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:18:25,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:25,446 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:18:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:26,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:26,183 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 [2018-09-10 10:18:26,191 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-10 10:18:26,191 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:18:26,262 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-09-10 10:18:26,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:26,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:26,389 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:28,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:28,271 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 [2018-09-10 10:18:28,286 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-10 10:18:28,287 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:18:28,490 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-09-10 10:18:28,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:28,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:28,522 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:28,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:18:28,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35, 35, 35] total 68 [2018-09-10 10:18:28,789 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:18:28,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-10 10:18:28,790 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-10 10:18:28,792 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1595, Invalid=2961, Unknown=0, NotChecked=0, Total=4556 [2018-09-10 10:18:28,792 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 37 states. [2018-09-10 10:18:31,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:18:31,445 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-09-10 10:18:31,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-10 10:18:31,445 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 105 [2018-09-10 10:18:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:18:31,447 INFO L225 Difference]: With dead ends: 120 [2018-09-10 10:18:31,447 INFO L226 Difference]: Without dead ends: 115 [2018-09-10 10:18:31,450 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 383 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3745, Invalid=6355, Unknown=0, NotChecked=0, Total=10100 [2018-09-10 10:18:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-10 10:18:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-10 10:18:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-10 10:18:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-10 10:18:31,458 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 105 [2018-09-10 10:18:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:18:31,458 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-10 10:18:31,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-10 10:18:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-10 10:18:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-10 10:18:31,460 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:18:31,460 INFO L376 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:18:31,460 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:18:31,460 INFO L82 PathProgramCache]: Analyzing trace with hash -264307849, now seen corresponding path program 12 times [2018-09-10 10:18:31,461 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:18:31,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:31,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:18:31,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:31,462 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:18:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:32,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:32,813 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 [2018-09-10 10:18:32,821 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-10 10:18:32,822 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-09-10 10:18:32,903 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-09-10 10:18:32,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:32,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:33,029 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:34,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:34,859 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 [2018-09-10 10:18:34,875 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-10 10:18:34,875 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-09-10 10:18:35,147 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-09-10 10:18:35,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:35,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:35,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:35,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:18:35,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 38] total 74 [2018-09-10 10:18:35,518 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:18:35,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-10 10:18:35,518 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-10 10:18:35,519 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1901, Invalid=3501, Unknown=0, NotChecked=0, Total=5402 [2018-09-10 10:18:35,520 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 40 states. [2018-09-10 10:18:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:18:38,656 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-09-10 10:18:38,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-10 10:18:38,656 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 114 [2018-09-10 10:18:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:18:38,657 INFO L225 Difference]: With dead ends: 129 [2018-09-10 10:18:38,657 INFO L226 Difference]: Without dead ends: 124 [2018-09-10 10:18:38,659 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 416 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4462, Invalid=7528, Unknown=0, NotChecked=0, Total=11990 [2018-09-10 10:18:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-10 10:18:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-10 10:18:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-10 10:18:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-10 10:18:38,666 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 114 [2018-09-10 10:18:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:18:38,666 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-10 10:18:38,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-10 10:18:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-10 10:18:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-10 10:18:38,668 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:18:38,668 INFO L376 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:18:38,668 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:18:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1271360003, now seen corresponding path program 13 times [2018-09-10 10:18:38,669 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:18:38,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:38,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:18:38,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:38,670 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:18:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:39,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:39,623 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 [2018-09-10 10:18:39,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:18:39,645 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:18:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:39,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:39,921 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:42,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:42,424 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 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 [2018-09-10 10:18:42,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:18:42,440 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:18:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:42,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:42,549 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:42,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:18:42,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41, 41, 41] total 80 [2018-09-10 10:18:42,807 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:18:42,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-10 10:18:42,807 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-10 10:18:42,808 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=2234, Invalid=4086, Unknown=0, NotChecked=0, Total=6320 [2018-09-10 10:18:42,808 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 43 states. [2018-09-10 10:18:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:18:46,781 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-09-10 10:18:46,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-10 10:18:46,781 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 123 [2018-09-10 10:18:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:18:46,783 INFO L225 Difference]: With dead ends: 138 [2018-09-10 10:18:46,783 INFO L226 Difference]: Without dead ends: 133 [2018-09-10 10:18:46,786 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 449 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=5242, Invalid=8800, Unknown=0, NotChecked=0, Total=14042 [2018-09-10 10:18:46,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-10 10:18:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-10 10:18:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-10 10:18:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-10 10:18:46,792 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 123 [2018-09-10 10:18:46,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:18:46,793 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-10 10:18:46,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-10 10:18:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-10 10:18:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-10 10:18:46,795 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:18:46,795 INFO L376 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:18:46,795 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:18:46,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1878746889, now seen corresponding path program 14 times [2018-09-10 10:18:46,795 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:18:46,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:46,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:18:46,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:46,796 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:18:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:47,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:47,895 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 [2018-09-10 10:18:47,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 10:18:47,905 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:18:48,017 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 10:18:48,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:48,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:48,221 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:50,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:50,969 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 [2018-09-10 10:18:50,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 10:18:50,986 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:18:51,070 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 10:18:51,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:51,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:51,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:51,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:18:51,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44, 44, 44] total 91 [2018-09-10 10:18:51,566 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:18:51,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-10 10:18:51,566 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-10 10:18:51,567 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=2827, Invalid=5363, Unknown=0, NotChecked=0, Total=8190 [2018-09-10 10:18:51,567 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 46 states. [2018-09-10 10:18:56,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:18:56,260 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-09-10 10:18:56,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-10 10:18:56,260 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 132 [2018-09-10 10:18:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:18:56,261 INFO L225 Difference]: With dead ends: 147 [2018-09-10 10:18:56,261 INFO L226 Difference]: Without dead ends: 142 [2018-09-10 10:18:56,262 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 476 SyntacticMatches, 6 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=6392, Invalid=10900, Unknown=0, NotChecked=0, Total=17292 [2018-09-10 10:18:56,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-10 10:18:56,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-10 10:18:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-10 10:18:56,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-10 10:18:56,269 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 132 [2018-09-10 10:18:56,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:18:56,270 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-10 10:18:56,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-10 10:18:56,270 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-10 10:18:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-10 10:18:56,271 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:18:56,271 INFO L376 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:18:56,272 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:18:56,272 INFO L82 PathProgramCache]: Analyzing trace with hash -927269757, now seen corresponding path program 15 times [2018-09-10 10:18:56,272 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:18:56,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:56,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:18:56,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:56,273 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:18:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:57,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:57,549 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:18:57,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-10 10:18:57,558 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-10 10:18:57,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-09-10 10:18:57,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:57,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:18:57,801 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:19:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:00,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:19:00,682 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 31 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 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:19:00,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-10 10:19:00,698 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-10 10:19:01,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-09-10 10:19:01,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:19:01,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:19:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:01,125 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:19:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:01,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:19:01,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47, 47, 47] total 92 [2018-09-10 10:19:01,355 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:19:01,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-10 10:19:01,355 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-10 10:19:01,356 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=2981, Invalid=5391, Unknown=0, NotChecked=0, Total=8372 [2018-09-10 10:19:01,356 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 49 states. [2018-09-10 10:19:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:19:06,784 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-10 10:19:06,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-10 10:19:06,784 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 141 [2018-09-10 10:19:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:19:06,786 INFO L225 Difference]: With dead ends: 156 [2018-09-10 10:19:06,786 INFO L226 Difference]: Without dead ends: 151 [2018-09-10 10:19:06,787 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 515 SyntacticMatches, 4 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=6991, Invalid=11641, Unknown=0, NotChecked=0, Total=18632 [2018-09-10 10:19:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-10 10:19:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-10 10:19:06,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-10 10:19:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-10 10:19:06,793 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 141 [2018-09-10 10:19:06,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:19:06,794 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-10 10:19:06,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-10 10:19:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-10 10:19:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-10 10:19:06,795 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:19:06,796 INFO L376 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:19:06,796 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:19:06,796 INFO L82 PathProgramCache]: Analyzing trace with hash -72493449, now seen corresponding path program 16 times [2018-09-10 10:19:06,797 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:19:06,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:19:06,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:19:06,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:19:06,798 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:19:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:19:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:08,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:19:08,141 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:19:08,151 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-10 10:19:08,151 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-10 10:19:08,221 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-10 10:19:08,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:19:08,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:19:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:08,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:19:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:11,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:19:11,783 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 33 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 33 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:19:11,801 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-10 10:19:11,801 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-10 10:19:11,867 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-10 10:19:11,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:19:11,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:19:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:12,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:19:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:12,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:19:12,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50, 50, 50] total 109 [2018-09-10 10:19:12,791 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:19:12,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-10 10:19:12,792 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-10 10:19:12,792 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3868, Invalid=7904, Unknown=0, NotChecked=0, Total=11772 [2018-09-10 10:19:12,793 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 52 states. [2018-09-10 10:19:13,229 WARN L175 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-09-10 10:19:13,372 WARN L175 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-10 10:19:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:19:19,082 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-09-10 10:19:19,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-10 10:19:19,082 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 150 [2018-09-10 10:19:19,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:19:19,084 INFO L225 Difference]: With dead ends: 165 [2018-09-10 10:19:19,084 INFO L226 Difference]: Without dead ends: 160 [2018-09-10 10:19:19,086 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 536 SyntacticMatches, 6 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=8657, Invalid=15523, Unknown=0, NotChecked=0, Total=24180 [2018-09-10 10:19:19,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-10 10:19:19,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-10 10:19:19,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-10 10:19:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-10 10:19:19,092 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 150 [2018-09-10 10:19:19,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:19:19,092 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-10 10:19:19,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-10 10:19:19,093 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-10 10:19:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-10 10:19:19,093 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:19:19,093 INFO L376 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:19:19,094 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:19:19,094 INFO L82 PathProgramCache]: Analyzing trace with hash 266268419, now seen corresponding path program 17 times [2018-09-10 10:19:19,094 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:19:19,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:19:19,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:19:19,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:19:19,095 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:19:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:19:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:20,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:19:20,856 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:19:20,872 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-10 10:19:20,872 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:19:21,134 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-09-10 10:19:21,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:19:21,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:19:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:21,501 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:19:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:25,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:19:25,543 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 35 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 35 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:19:25,569 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-10 10:19:25,569 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:19:26,007 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-09-10 10:19:26,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:19:26,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:19:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:26,058 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:19:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:26,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:19:26,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53, 53, 53] total 104 [2018-09-10 10:19:26,349 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:19:26,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-10 10:19:26,350 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-10 10:19:26,350 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3836, Invalid=6876, Unknown=0, NotChecked=0, Total=10712 [2018-09-10 10:19:26,351 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 55 states. [2018-09-10 10:19:26,627 WARN L175 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 8 [2018-09-10 10:19:26,752 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 8 [2018-09-10 10:19:26,884 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2018-09-10 10:19:27,016 WARN L175 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-10 10:19:27,158 WARN L175 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-10 10:19:27,295 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-10 10:19:27,441 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-10 10:19:27,586 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-10 10:19:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:19:33,390 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-09-10 10:19:33,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-10 10:19:33,394 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 159 [2018-09-10 10:19:33,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:19:33,395 INFO L225 Difference]: With dead ends: 174 [2018-09-10 10:19:33,395 INFO L226 Difference]: Without dead ends: 169 [2018-09-10 10:19:33,396 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 581 SyntacticMatches, 4 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=8992, Invalid=14878, Unknown=0, NotChecked=0, Total=23870 [2018-09-10 10:19:33,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-10 10:19:33,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-10 10:19:33,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-10 10:19:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-10 10:19:33,404 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 159 [2018-09-10 10:19:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:19:33,405 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-10 10:19:33,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-10 10:19:33,405 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-10 10:19:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-10 10:19:33,406 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:19:33,406 INFO L376 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:19:33,406 INFO L423 AbstractCegarLoop]: === Iteration 20 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:19:33,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1651330057, now seen corresponding path program 18 times [2018-09-10 10:19:33,407 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:19:33,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:19:33,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:19:33,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:19:33,409 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:19:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:19:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:35,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:19:35,124 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:19:35,131 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-10 10:19:35,131 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-09-10 10:19:35,204 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2018-09-10 10:19:35,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:19:35,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:19:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:35,465 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:19:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:39,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:19:39,704 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 37 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 37 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:19:39,720 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-10 10:19:39,720 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-09-10 10:19:40,236 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2018-09-10 10:19:40,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:19:40,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:19:40,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:40,320 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:19:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:41,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:19:41,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56, 56, 56] total 110 [2018-09-10 10:19:41,878 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:19:41,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-10 10:19:41,879 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-10 10:19:41,879 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=4304, Invalid=7686, Unknown=0, NotChecked=0, Total=11990 [2018-09-10 10:19:41,880 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 58 states. [2018-09-10 10:19:42,139 WARN L175 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 8 [2018-09-10 10:19:42,262 WARN L175 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-09-10 10:19:42,410 WARN L175 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-09-10 10:19:42,563 WARN L175 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-10 10:19:42,714 WARN L175 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-10 10:19:42,869 WARN L175 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-10 10:19:43,027 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-10 10:19:43,190 WARN L175 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-10 10:19:43,348 WARN L175 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-10 10:19:43,507 WARN L175 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-10 10:19:43,672 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-10 10:19:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:19:49,895 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2018-09-10 10:19:49,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-10 10:19:49,895 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 168 [2018-09-10 10:19:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:19:49,897 INFO L225 Difference]: With dead ends: 183 [2018-09-10 10:19:49,897 INFO L226 Difference]: Without dead ends: 178 [2018-09-10 10:19:49,898 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 614 SyntacticMatches, 4 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=10087, Invalid=16645, Unknown=0, NotChecked=0, Total=26732 [2018-09-10 10:19:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-10 10:19:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-09-10 10:19:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-10 10:19:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-09-10 10:19:49,906 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 168 [2018-09-10 10:19:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:19:49,907 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-09-10 10:19:49,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-10 10:19:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-09-10 10:19:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-09-10 10:19:49,908 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:19:49,908 INFO L376 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:19:49,908 INFO L423 AbstractCegarLoop]: === Iteration 21 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:19:49,909 INFO L82 PathProgramCache]: Analyzing trace with hash -639942269, now seen corresponding path program 19 times [2018-09-10 10:19:49,909 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:19:49,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:19:49,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:19:49,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:19:49,910 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:19:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:19:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:51,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:19:51,829 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:19:51,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:19:51,837 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:19:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:19:52,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:19:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:52,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:19:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:57,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:19:57,587 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 39 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 39 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:19:57,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:19:57,605 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:19:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:19:57,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:19:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:57,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:19:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:19:58,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:19:58,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59, 59, 59] total 116 [2018-09-10 10:19:58,066 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:19:58,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-10 10:19:58,067 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-10 10:19:58,067 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=4799, Invalid=8541, Unknown=0, NotChecked=0, Total=13340 [2018-09-10 10:19:58,067 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 61 states. [2018-09-10 10:19:58,292 WARN L175 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-09-10 10:19:58,430 WARN L175 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 8 [2018-09-10 10:19:58,587 WARN L175 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2018-09-10 10:19:58,752 WARN L175 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-10 10:19:58,921 WARN L175 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-10 10:19:59,097 WARN L175 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-10 10:19:59,272 WARN L175 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-10 10:19:59,454 WARN L175 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-10 10:19:59,635 WARN L175 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-10 10:19:59,817 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-10 10:20:00,008 WARN L175 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-10 10:20:00,191 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-10 10:20:00,372 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-10 10:20:00,557 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-10 10:20:00,933 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-09-10 10:20:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:20:07,329 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2018-09-10 10:20:07,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-10 10:20:07,329 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 177 [2018-09-10 10:20:07,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:20:07,331 INFO L225 Difference]: With dead ends: 192 [2018-09-10 10:20:07,331 INFO L226 Difference]: Without dead ends: 187 [2018-09-10 10:20:07,332 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 647 SyntacticMatches, 4 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=11245, Invalid=18511, Unknown=0, NotChecked=0, Total=29756 [2018-09-10 10:20:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-10 10:20:07,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-10 10:20:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-10 10:20:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-10 10:20:07,340 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 177 [2018-09-10 10:20:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:20:07,341 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-10 10:20:07,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-10 10:20:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-10 10:20:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-10 10:20:07,342 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:20:07,342 INFO L376 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:20:07,342 INFO L423 AbstractCegarLoop]: === Iteration 22 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:20:07,342 INFO L82 PathProgramCache]: Analyzing trace with hash -99929737, now seen corresponding path program 20 times [2018-09-10 10:20:07,342 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:20:07,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:20:07,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:20:07,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:20:07,343 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:20:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:20:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:09,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:20:09,519 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:20:09,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 10:20:09,527 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:20:09,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 10:20:09,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:20:10,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:20:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:10,191 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:20:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:15,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:20:15,396 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 41 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 41 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:20:15,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 10:20:15,411 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:20:15,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 10:20:15,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:20:15,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:20:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:15,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:20:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:16,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:20:16,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62, 62, 62] total 127 [2018-09-10 10:20:16,269 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:20:16,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-10 10:20:16,270 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-10 10:20:16,271 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=5644, Invalid=10358, Unknown=0, NotChecked=0, Total=16002 [2018-09-10 10:20:16,272 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 64 states. [2018-09-10 10:20:16,500 WARN L175 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 8 [2018-09-10 10:20:16,656 WARN L175 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-09-10 10:20:16,838 WARN L175 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-09-10 10:20:17,021 WARN L175 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-10 10:20:17,209 WARN L175 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-10 10:20:17,400 WARN L175 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-10 10:20:17,606 WARN L175 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-10 10:20:17,809 WARN L175 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-10 10:20:18,009 WARN L175 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-10 10:20:18,216 WARN L175 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-10 10:20:18,425 WARN L175 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-10 10:20:18,631 WARN L175 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-10 10:20:18,832 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-10 10:20:19,035 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-10 10:20:19,244 WARN L175 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-10 10:20:19,447 WARN L175 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-10 10:20:19,852 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-10 10:20:26,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:20:26,981 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2018-09-10 10:20:26,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-10 10:20:26,984 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 186 [2018-09-10 10:20:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:20:26,986 INFO L225 Difference]: With dead ends: 201 [2018-09-10 10:20:26,986 INFO L226 Difference]: Without dead ends: 196 [2018-09-10 10:20:26,987 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 674 SyntacticMatches, 6 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3044 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=12899, Invalid=21511, Unknown=0, NotChecked=0, Total=34410 [2018-09-10 10:20:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-10 10:20:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-10 10:20:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-10 10:20:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-09-10 10:20:26,995 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 186 [2018-09-10 10:20:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:20:26,996 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-09-10 10:20:26,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-10 10:20:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-09-10 10:20:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-10 10:20:26,997 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:20:26,997 INFO L376 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:20:26,997 INFO L423 AbstractCegarLoop]: === Iteration 23 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:20:26,998 INFO L82 PathProgramCache]: Analyzing trace with hash 89650179, now seen corresponding path program 21 times [2018-09-10 10:20:26,998 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:20:26,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:20:26,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:20:26,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:20:26,999 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:20:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:20:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:29,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:20:29,826 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:20:29,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-10 10:20:29,836 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-10 10:20:29,908 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 62 check-sat command(s) [2018-09-10 10:20:29,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:20:29,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:20:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:30,130 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:20:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:35,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:20:35,918 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 43 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 43 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:20:35,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-10 10:20:35,945 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-10 10:20:36,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 62 check-sat command(s) [2018-09-10 10:20:36,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:20:36,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:20:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:36,680 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:20:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:36,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:20:36,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65, 65, 65] total 128 [2018-09-10 10:20:36,914 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:20:36,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-10 10:20:36,915 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-10 10:20:36,915 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=5870, Invalid=10386, Unknown=0, NotChecked=0, Total=16256 [2018-09-10 10:20:36,916 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 67 states. [2018-09-10 10:20:37,155 WARN L175 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-09-10 10:20:37,316 WARN L175 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 8 [2018-09-10 10:20:37,498 WARN L175 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 9 [2018-09-10 10:20:37,689 WARN L175 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-10 10:20:37,885 WARN L175 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-10 10:20:38,101 WARN L175 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-10 10:20:38,329 WARN L175 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-10 10:20:38,539 WARN L175 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-10 10:20:38,745 WARN L175 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-10 10:20:38,955 WARN L175 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-10 10:20:39,166 WARN L175 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-10 10:20:39,381 WARN L175 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-10 10:20:39,612 WARN L175 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-10 10:20:39,833 WARN L175 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-10 10:20:40,052 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-10 10:20:40,276 WARN L175 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-10 10:20:40,494 WARN L175 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-10 10:20:40,811 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-10 10:20:41,030 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-10 10:20:41,248 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-10 10:20:43,282 WARN L175 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 11 [2018-09-10 10:20:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:20:49,062 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2018-09-10 10:20:49,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-10 10:20:49,063 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 195 [2018-09-10 10:20:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:20:49,064 INFO L225 Difference]: With dead ends: 210 [2018-09-10 10:20:49,064 INFO L226 Difference]: Without dead ends: 205 [2018-09-10 10:20:49,066 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 713 SyntacticMatches, 4 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=13750, Invalid=22540, Unknown=0, NotChecked=0, Total=36290 [2018-09-10 10:20:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-10 10:20:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-10 10:20:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-10 10:20:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-10 10:20:49,074 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 195 [2018-09-10 10:20:49,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:20:49,074 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-10 10:20:49,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-10 10:20:49,074 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-10 10:20:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-10 10:20:49,075 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:20:49,075 INFO L376 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:20:49,075 INFO L423 AbstractCegarLoop]: === Iteration 24 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:20:49,076 INFO L82 PathProgramCache]: Analyzing trace with hash 795823863, now seen corresponding path program 22 times [2018-09-10 10:20:49,076 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:20:49,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:20:49,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:20:49,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:20:49,077 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:20:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:20:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:51,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:20:51,962 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:20:51,973 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-10 10:20:51,973 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-10 10:20:52,247 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-10 10:20:52,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:20:52,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:20:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:52,614 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:20:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:20:59,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:20:59,019 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 45 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 45 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:20:59,035 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-10 10:20:59,035 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-10 10:20:59,123 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-10 10:20:59,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:20:59,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:21:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:21:01,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:21:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:21:04,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:21:04,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68, 68, 68] total 181 [2018-09-10 10:21:04,133 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:21:04,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-10 10:21:04,134 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-10 10:21:04,134 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=9403, Invalid=23177, Unknown=0, NotChecked=0, Total=32580 [2018-09-10 10:21:04,134 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 70 states. [2018-09-10 10:21:04,443 WARN L175 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 8 [2018-09-10 10:21:04,618 WARN L175 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-09-10 10:21:04,892 WARN L175 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-09-10 10:21:05,167 WARN L175 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-10 10:21:05,451 WARN L175 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-10 10:21:05,739 WARN L175 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-10 10:21:06,018 WARN L175 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-10 10:21:06,311 WARN L175 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-10 10:21:06,595 WARN L175 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-10 10:21:06,909 WARN L175 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-10 10:21:07,212 WARN L175 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-10 10:21:07,524 WARN L175 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-10 10:21:07,825 WARN L175 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-10 10:21:08,121 WARN L175 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-10 10:21:08,430 WARN L175 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-10 10:21:08,752 WARN L175 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-10 10:21:09,079 WARN L175 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-10 10:21:09,373 WARN L175 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-10 10:21:09,665 WARN L175 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-10 10:21:09,967 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-10 10:21:10,256 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-10 10:21:10,541 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-10 10:21:10,834 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-10 10:21:11,134 WARN L175 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-10 10:21:11,425 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-09-10 10:21:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:21:19,461 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2018-09-10 10:21:19,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-10 10:21:19,462 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 204 [2018-09-10 10:21:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:21:19,463 INFO L225 Difference]: With dead ends: 219 [2018-09-10 10:21:19,463 INFO L226 Difference]: Without dead ends: 214 [2018-09-10 10:21:19,465 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 698 SyntacticMatches, 6 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11294 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=19709, Invalid=40561, Unknown=0, NotChecked=0, Total=60270 [2018-09-10 10:21:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-10 10:21:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-09-10 10:21:19,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-10 10:21:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2018-09-10 10:21:19,474 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 204 [2018-09-10 10:21:19,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:21:19,475 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2018-09-10 10:21:19,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-10 10:21:19,475 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2018-09-10 10:21:19,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-10 10:21:19,476 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:21:19,476 INFO L376 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:21:19,477 INFO L423 AbstractCegarLoop]: === Iteration 25 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:21:19,477 INFO L82 PathProgramCache]: Analyzing trace with hash 385681027, now seen corresponding path program 23 times [2018-09-10 10:21:19,477 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:21:19,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:21:19,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:21:19,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:21:19,478 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:21:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:21:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:21:22,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:21:22,224 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:21:22,232 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-10 10:21:22,233 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:21:22,664 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2018-09-10 10:21:22,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:21:22,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:21:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:21:22,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:21:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:21:30,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:21:30,196 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 47 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 47 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:21:30,211 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-10 10:21:30,212 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:21:31,029 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2018-09-10 10:21:31,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:21:31,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:21:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:21:31,114 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:21:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:21:31,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:21:31,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71, 71, 71] total 140 [2018-09-10 10:21:31,358 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:21:31,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-10 10:21:31,359 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-10 10:21:31,360 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7049, Invalid=12411, Unknown=0, NotChecked=0, Total=19460 [2018-09-10 10:21:31,360 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 73 states. [2018-09-10 10:21:32,114 WARN L175 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-09-10 10:21:32,300 WARN L175 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 8 [2018-09-10 10:21:32,527 WARN L175 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2018-09-10 10:21:32,744 WARN L175 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-10 10:21:32,966 WARN L175 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-10 10:21:33,198 WARN L175 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-10 10:21:33,424 WARN L175 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-10 10:21:33,657 WARN L175 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-10 10:21:33,898 WARN L175 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-10 10:21:34,220 WARN L175 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-10 10:21:34,483 WARN L175 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-10 10:21:34,764 WARN L175 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-10 10:21:35,015 WARN L175 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-10 10:21:35,269 WARN L175 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-10 10:21:35,515 WARN L175 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-10 10:21:35,776 WARN L175 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-10 10:21:36,040 WARN L175 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-10 10:21:36,296 WARN L175 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-10 10:21:36,549 WARN L175 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-10 10:21:36,805 WARN L175 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-10 10:21:37,059 WARN L175 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-10 10:21:37,310 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-10 10:21:37,566 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-10 10:21:37,826 WARN L175 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-10 10:21:38,079 WARN L175 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-10 10:21:38,335 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-10 10:21:38,711 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-10 10:21:39,461 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-09-10 10:21:39,726 WARN L175 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2018-09-10 10:21:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:21:47,056 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2018-09-10 10:21:47,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-10 10:21:47,056 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 213 [2018-09-10 10:21:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:21:47,058 INFO L225 Difference]: With dead ends: 228 [2018-09-10 10:21:47,058 INFO L226 Difference]: Without dead ends: 223 [2018-09-10 10:21:47,060 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 779 SyntacticMatches, 4 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=16507, Invalid=26965, Unknown=0, NotChecked=0, Total=43472 [2018-09-10 10:21:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-10 10:21:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-10 10:21:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-10 10:21:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-10 10:21:47,070 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 213 [2018-09-10 10:21:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:21:47,071 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-10 10:21:47,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-10 10:21:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-10 10:21:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-10 10:21:47,072 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:21:47,072 INFO L376 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:21:47,073 INFO L423 AbstractCegarLoop]: === Iteration 26 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_new_count_by_k_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:21:47,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1981222007, now seen corresponding path program 24 times [2018-09-10 10:21:47,073 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:21:47,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:21:47,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:21:47,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:21:47,074 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:21:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:21:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:21:50,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:21:50,422 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:21:50,430 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-10 10:21:50,430 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-09-10 10:21:50,514 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2018-09-10 10:21:50,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:21:50,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:21:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:21:50,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:21:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:21:58,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:21:58,188 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 49 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 49 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:21:58,204 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-10 10:21:58,204 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-09-10 10:21:59,057 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2018-09-10 10:21:59,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:21:59,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:21:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:21:59,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:21:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:21:59,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:21:59,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74, 74, 74] total 146 [2018-09-10 10:21:59,443 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:21:59,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-10 10:21:59,444 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-10 10:21:59,445 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7679, Invalid=13491, Unknown=0, NotChecked=0, Total=21170 [2018-09-10 10:21:59,445 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 76 states. [2018-09-10 10:21:59,779 WARN L175 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 8 [2018-09-10 10:21:59,985 WARN L175 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-09-10 10:22:00,270 WARN L175 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-09-10 10:22:00,514 WARN L175 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-10 10:22:00,752 WARN L175 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-10 10:22:00,992 WARN L175 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-10 10:22:01,234 WARN L175 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 Received shutdown request... [2018-09-10 10:22:01,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-10 10:22:01,283 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 10:22:01,288 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 10:22:01,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 10:22:01 BoogieIcfgContainer [2018-09-10 10:22:01,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 10:22:01,289 INFO L168 Benchmark]: Toolchain (without parser) took 248185.96 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 687.3 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -467.9 MB). Peak memory consumption was 219.4 MB. Max. memory is 7.1 GB. [2018-09-10 10:22:01,290 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-09-10 10:22:01,290 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.32 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. [2018-09-10 10:22:01,290 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.41 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. [2018-09-10 10:22:01,291 INFO L168 Benchmark]: Boogie Preprocessor took 20.59 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. [2018-09-10 10:22:01,291 INFO L168 Benchmark]: RCFGBuilder took 323.88 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -777.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2018-09-10 10:22:01,292 INFO L168 Benchmark]: TraceAbstraction took 247561.49 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -47.2 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 298.5 MB). Peak memory consumption was 251.3 MB. Max. memory is 7.1 GB. [2018-09-10 10:22:01,299 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 252.32 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 21.41 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 20.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 323.88 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -777.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247561.49 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -47.2 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 298.5 MB). Peak memory consumption was 251.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (223states) and FLOYD_HOARE automaton (currently 9 states, 76 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 153 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. TIMEOUT Result, 247.4s OverallTime, 26 OverallIterations, 71 TraceHistogramMax, 117.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 339 SDtfs, 3530 SDslu, 7951 SDs, 0 SdLazy, 3683 SolverSat, 2284 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13119 GetRequests, 10286 SyntacticMatches, 108 SemanticMatches, 2724 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39947 ImplicationChecksByTransitivity, 217.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=25, 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: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 10.5s SatisfiabilityAnalysisTime, 117.0s InterpolantComputationTime, 8555 NumberOfCodeBlocks, 8555 NumberOfCodeBlocksAsserted, 1026 NumberOfCheckSat, 14121 ConstructedInterpolants, 142 QuantifiedInterpolants, 13440723 SizeOfPredicates, 144 NumberOfNonLiveVariables, 8208 ConjunctsInSsa, 1848 ConjunctsInUnsatCore, 122 InterpolantComputations, 2 PerfectInterpolantSequences, 0/306600 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k_true-unreach-call_true-termination.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_10-22-01-309.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k_true-unreach-call_true-termination.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_10-22-01-309.csv Completed graceful shutdown