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-crafted/simple_array_index_value_true-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:13:23,937 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:13:23,941 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:13:23,958 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:13:23,960 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:13:23,961 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:13:23,962 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:13:23,964 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:13:23,966 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:13:23,968 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:13:23,970 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:13:23,971 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:13:23,972 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:13:23,974 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:13:23,975 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:13:23,983 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:13:23,984 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:13:23,988 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:13:23,990 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:13:23,991 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:13:23,993 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:13:23,994 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:13:23,997 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:13:23,997 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:13:23,997 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:13:24,000 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:13:24,001 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:13:24,001 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:13:24,002 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:13:24,004 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:13:24,005 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:13:24,005 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 10:13:24,006 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 10:13:24,006 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 10:13:24,007 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 10:13:24,007 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 10:13:24,008 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 10:13:24,023 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:13:24,023 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:13:24,025 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:13:24,025 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:13:24,025 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:13:24,025 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:13:24,025 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:13:24,026 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:13:24,026 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:13:24,026 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:13:24,026 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:13:24,027 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:13:24,027 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:13:24,028 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:13:24,028 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:13:24,028 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:13:24,028 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:13:24,028 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:13:24,029 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:13:24,029 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:13:24,029 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:13:24,029 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:13:24,029 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:13:24,030 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:13:24,030 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:13:24,030 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:13:24,030 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:13:24,030 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:13:24,031 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:13:24,031 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:13:24,031 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:13:24,031 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:13:24,031 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:13:24,095 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:13:24,108 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:13:24,113 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:13:24,115 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:13:24,115 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:13:24,116 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call1_true-termination.i [2018-09-10 10:13:24,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2185a125/ec8bff70b0244f04bb4037562099204f/FLAGde02934c2 [2018-09-10 10:13:24,602 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:13:24,603 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call1_true-termination.i [2018-09-10 10:13:24,609 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2185a125/ec8bff70b0244f04bb4037562099204f/FLAGde02934c2 [2018-09-10 10:13:24,624 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2185a125/ec8bff70b0244f04bb4037562099204f [2018-09-10 10:13:24,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:13:24,640 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:13:24,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:13:24,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:13:24,649 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:13:24,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:13:24" (1/1) ... [2018-09-10 10:13:24,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aecc83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24, skipping insertion in model container [2018-09-10 10:13:24,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:13:24" (1/1) ... [2018-09-10 10:13:24,862 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:13:24,913 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:13:24,937 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:13:24,947 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:13:24,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24 WrapperNode [2018-09-10 10:13:24,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:13:24,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:13:24,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:13:24,962 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:13:24,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24" (1/1) ... [2018-09-10 10:13:24,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24" (1/1) ... [2018-09-10 10:13:24,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:13:24,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:13:24,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:13:24,982 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:13:24,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24" (1/1) ... [2018-09-10 10:13:24,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24" (1/1) ... [2018-09-10 10:13:24,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24" (1/1) ... [2018-09-10 10:13:24,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24" (1/1) ... [2018-09-10 10:13:24,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24" (1/1) ... [2018-09-10 10:13:24,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24" (1/1) ... [2018-09-10 10:13:25,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24" (1/1) ... [2018-09-10 10:13:25,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:13:25,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:13:25,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:13:25,003 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:13:25,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24" (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 10:13:25,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:13:25,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:13:25,086 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assert [2018-09-10 10:13:25,086 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assert [2018-09-10 10:13:25,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:13:25,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:13:25,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:13:25,087 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:13:25,444 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:13:25,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:13:25 BoogieIcfgContainer [2018-09-10 10:13:25,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:13:25,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:13:25,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:13:25,450 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:13:25,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:13:24" (1/3) ... [2018-09-10 10:13:25,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707e3fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:13:25, skipping insertion in model container [2018-09-10 10:13:25,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:13:24" (2/3) ... [2018-09-10 10:13:25,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707e3fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:13:25, skipping insertion in model container [2018-09-10 10:13:25,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:13:25" (3/3) ... [2018-09-10 10:13:25,454 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_true-unreach-call1_true-termination.i [2018-09-10 10:13:25,466 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:13:25,475 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:13:25,530 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:13:25,530 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:13:25,531 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:13:25,531 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:13:25,531 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:13:25,531 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:13:25,531 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:13:25,531 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:13:25,532 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:13:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-09-10 10:13:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-10 10:13:25,560 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:13:25,561 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:13:25,562 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:13:25,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1189535701, now seen corresponding path program 1 times [2018-09-10 10:13:25,571 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:13:25,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:25,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:13:25,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:25,624 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:13:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:13:25,683 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 10:13:25,685 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:13:25,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-10 10:13:25,685 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:13:25,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-10 10:13:25,701 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-10 10:13:25,702 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-10 10:13:25,704 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-09-10 10:13:25,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:13:25,732 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2018-09-10 10:13:25,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-10 10:13:25,733 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-09-10 10:13:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:13:25,746 INFO L225 Difference]: With dead ends: 42 [2018-09-10 10:13:25,746 INFO L226 Difference]: Without dead ends: 21 [2018-09-10 10:13:25,752 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 10:13:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-10 10:13:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-10 10:13:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-10 10:13:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2018-09-10 10:13:25,794 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2018-09-10 10:13:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:13:25,794 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2018-09-10 10:13:25,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-10 10:13:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2018-09-10 10:13:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-10 10:13:25,796 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:13:25,796 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:13:25,796 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:13:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2089413066, now seen corresponding path program 1 times [2018-09-10 10:13:25,797 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:13:25,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:25,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:13:25,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:25,799 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:13:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:13:26,001 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 10:13:26,001 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:13:26,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:13:26,003 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:13:26,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:13:26,005 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:13:26,005 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:13:26,005 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 3 states. [2018-09-10 10:13:26,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:13:26,142 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2018-09-10 10:13:26,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:13:26,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-09-10 10:13:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:13:26,144 INFO L225 Difference]: With dead ends: 42 [2018-09-10 10:13:26,144 INFO L226 Difference]: Without dead ends: 29 [2018-09-10 10:13:26,145 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:13:26,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-10 10:13:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-10 10:13:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-10 10:13:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-09-10 10:13:26,155 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2018-09-10 10:13:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:13:26,155 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-09-10 10:13:26,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:13:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2018-09-10 10:13:26,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-10 10:13:26,157 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:13:26,157 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:13:26,157 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:13:26,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2119982969, now seen corresponding path program 1 times [2018-09-10 10:13:26,158 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:13:26,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:26,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:13:26,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:26,160 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:13:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:13:26,266 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 10:13:26,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:13:26,266 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 10:13:26,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:13:26,294 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:13:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:13:26,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:13:26,392 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2018-09-10 10:13:26,396 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-10 10:13:26,412 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2018-09-10 10:13:26,413 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-10 10:13:26,580 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-09-10 10:13:26,580 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:76, output treesize:16 [2018-09-10 10:13:27,017 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 10:13:27,017 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:13:27,720 WARN L175 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2018-09-10 10:13:27,732 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2018-09-10 10:13:27,736 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-10 10:13:27,749 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-10 10:13:27,750 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:5 [2018-09-10 10:13:27,772 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 10:13:27,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:13:27,804 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 10:13:27,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:13:27,829 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:13:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:13:27,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:13:27,866 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 10:13:27,866 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:13:28,058 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 10:13:28,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:13:28,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 8, 4, 4] total 16 [2018-09-10 10:13:28,061 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:13:28,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 10:13:28,062 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 10:13:28,063 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2018-09-10 10:13:28,063 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2018-09-10 10:13:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:13:30,534 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2018-09-10 10:13:30,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:13:30,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2018-09-10 10:13:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:13:30,537 INFO L225 Difference]: With dead ends: 57 [2018-09-10 10:13:30,537 INFO L226 Difference]: Without dead ends: 41 [2018-09-10 10:13:30,539 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-09-10 10:13:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-10 10:13:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2018-09-10 10:13:30,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-10 10:13:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2018-09-10 10:13:30,549 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 18 [2018-09-10 10:13:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:13:30,549 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2018-09-10 10:13:30,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-10 10:13:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2018-09-10 10:13:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-10 10:13:30,550 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:13:30,551 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:13:30,551 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:13:30,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1507542460, now seen corresponding path program 1 times [2018-09-10 10:13:30,552 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:13:30,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:30,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:13:30,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:30,553 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:13:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:13:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:13:30,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:13:30,748 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 10:13:30,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:13:30,760 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:13:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:13:30,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:13:30,809 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2018-09-10 10:13:30,809 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-10 10:13:30,829 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-10 10:13:30,829 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-10 10:13:30,875 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-09-10 10:13:30,876 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:76, output treesize:16 [2018-09-10 10:13:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:13:31,131 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:13:33,389 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2018-09-10 10:13:33,396 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-10 10:13:33,401 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-10 10:13:33,401 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:5 [2018-09-10 10:13:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:13:33,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:13:33,510 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 10:13:33,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:13:33,530 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:13:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:13:33,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:13:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:13:33,596 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:13:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:13:33,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:13:33,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 10, 5, 5] total 21 [2018-09-10 10:13:33,834 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:13:33,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-10 10:13:33,835 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-10 10:13:33,836 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=335, Unknown=1, NotChecked=0, Total=420 [2018-09-10 10:13:33,836 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2018-09-10 10:13:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:13:38,391 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2018-09-10 10:13:38,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:13:38,392 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-09-10 10:13:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:13:38,394 INFO L225 Difference]: With dead ends: 102 [2018-09-10 10:13:38,394 INFO L226 Difference]: Without dead ends: 77 [2018-09-10 10:13:38,395 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=99, Invalid=406, Unknown=1, NotChecked=0, Total=506 [2018-09-10 10:13:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-10 10:13:38,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2018-09-10 10:13:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-10 10:13:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2018-09-10 10:13:38,412 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 30 [2018-09-10 10:13:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:13:38,412 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2018-09-10 10:13:38,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-10 10:13:38,412 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2018-09-10 10:13:38,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-10 10:13:38,414 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:13:38,414 INFO L376 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:13:38,414 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:13:38,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2120147996, now seen corresponding path program 2 times [2018-09-10 10:13:38,415 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:13:38,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:38,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:13:38,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:38,416 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:13:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:13:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:13:38,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:13:38,573 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 10:13:38,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 10:13:38,582 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:13:38,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 10:13:38,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:13:38,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:13:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:13:38,639 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:13:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:13:39,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:13:39,855 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 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 10:13:39,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 10:13:39,871 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:13:39,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 10:13:39,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:13:39,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:13:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:13:39,929 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:13:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:13:39,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:13:39,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 12 [2018-09-10 10:13:39,952 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:13:39,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 10:13:39,953 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 10:13:39,953 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:13:39,954 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 7 states. [2018-09-10 10:13:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:13:40,411 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2018-09-10 10:13:40,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:13:40,413 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2018-09-10 10:13:40,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:13:40,414 INFO L225 Difference]: With dead ends: 109 [2018-09-10 10:13:40,414 INFO L226 Difference]: Without dead ends: 65 [2018-09-10 10:13:40,417 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:13:40,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-10 10:13:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2018-09-10 10:13:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-10 10:13:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2018-09-10 10:13:40,442 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 36 [2018-09-10 10:13:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:13:40,442 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2018-09-10 10:13:40,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 10:13:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2018-09-10 10:13:40,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-10 10:13:40,448 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:13:40,448 INFO L376 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:13:40,450 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:13:40,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1199710669, now seen corresponding path program 3 times [2018-09-10 10:13:40,450 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:13:40,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:40,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:13:40,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:40,452 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:13:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:13:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:13:40,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:13:40,815 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 10:13:40,823 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-10 10:13:40,824 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-10 10:13:53,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-10 10:13:53,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:13:53,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:13:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:13:53,242 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:13:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:13:53,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:13:53,931 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 10:13:53,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-10 10:13:53,947 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-10 10:13:54,153 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-10 10:13:54,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:13:54,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:13:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:13:54,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:13:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:13:54,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:13:54,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 14 [2018-09-10 10:13:54,205 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:13:54,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 10:13:54,206 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 10:13:54,206 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-09-10 10:13:54,206 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 8 states. [2018-09-10 10:13:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:13:54,511 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2018-09-10 10:13:54,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:13:54,518 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2018-09-10 10:13:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:13:54,520 INFO L225 Difference]: With dead ends: 113 [2018-09-10 10:13:54,520 INFO L226 Difference]: Without dead ends: 73 [2018-09-10 10:13:54,521 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-09-10 10:13:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-10 10:13:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2018-09-10 10:13:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-10 10:13:54,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2018-09-10 10:13:54,536 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 39 [2018-09-10 10:13:54,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:13:54,536 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2018-09-10 10:13:54,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-10 10:13:54,536 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2018-09-10 10:13:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-10 10:13:54,537 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:13:54,538 INFO L376 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:13:54,538 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:13:54,538 INFO L82 PathProgramCache]: Analyzing trace with hash 477480324, now seen corresponding path program 4 times [2018-09-10 10:13:54,538 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:13:54,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:54,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:13:54,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:54,540 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:13:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:13:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:13:54,778 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:13:54,778 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 10:13:54,786 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-10 10:13:54,787 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-10 10:13:54,812 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-10 10:13:54,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:13:54,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:13:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:13:54,825 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:13:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:13:56,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:13:56,553 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 10:13:56,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-10 10:13:56,571 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-10 10:13:56,650 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-10 10:13:56,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:13:56,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:13:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:13:56,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:13:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:13:56,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:13:56,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 16 [2018-09-10 10:13:56,767 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:13:56,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:13:56,768 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:13:56,768 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2018-09-10 10:13:56,775 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 9 states. [2018-09-10 10:13:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:13:57,126 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2018-09-10 10:13:57,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-10 10:13:57,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2018-09-10 10:13:57,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:13:57,127 INFO L225 Difference]: With dead ends: 126 [2018-09-10 10:13:57,127 INFO L226 Difference]: Without dead ends: 81 [2018-09-10 10:13:57,128 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2018-09-10 10:13:57,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-10 10:13:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2018-09-10 10:13:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-10 10:13:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2018-09-10 10:13:57,143 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 42 [2018-09-10 10:13:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:13:57,144 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2018-09-10 10:13:57,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:13:57,144 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2018-09-10 10:13:57,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-10 10:13:57,145 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:13:57,145 INFO L376 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:13:57,146 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:13:57,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1975168877, now seen corresponding path program 5 times [2018-09-10 10:13:57,146 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:13:57,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:57,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:13:57,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:13:57,147 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:13:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:13:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:13:57,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:13:57,338 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 10:13:57,345 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-10 10:13:57,346 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:13:57,473 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-10 10:13:57,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:13:57,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:13:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:13:57,489 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:14:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:14:01,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:14:01,965 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 10:14:01,980 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-10 10:14:01,980 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:14:02,318 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-10 10:14:02,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:14:02,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:14:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:14:02,366 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:14:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:14:02,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:14:02,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 18 [2018-09-10 10:14:02,421 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:14:02,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-10 10:14:02,422 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-10 10:14:02,422 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=208, Unknown=1, NotChecked=0, Total=306 [2018-09-10 10:14:02,422 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 10 states. [2018-09-10 10:14:02,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:14:02,919 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2018-09-10 10:14:02,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 10:14:02,920 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2018-09-10 10:14:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:14:02,921 INFO L225 Difference]: With dead ends: 139 [2018-09-10 10:14:02,921 INFO L226 Difference]: Without dead ends: 89 [2018-09-10 10:14:02,922 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=97, Invalid=208, Unknown=1, NotChecked=0, Total=306 [2018-09-10 10:14:02,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-10 10:14:02,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2018-09-10 10:14:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-10 10:14:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2018-09-10 10:14:02,936 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 45 [2018-09-10 10:14:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:14:02,936 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2018-09-10 10:14:02,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-10 10:14:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2018-09-10 10:14:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-10 10:14:02,937 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:14:02,938 INFO L376 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:14:02,938 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:14:02,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1431090980, now seen corresponding path program 6 times [2018-09-10 10:14:02,938 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:14:02,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:14:02,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:14:02,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:14:02,939 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:14:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:14:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:14:03,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:14:03,460 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 10:14:03,469 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-10 10:14:03,469 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-09-10 10:14:03,802 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-10 10:14:03,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:14:03,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:14:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:14:03,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:14:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:14:05,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:14:05,933 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 10:14:05,950 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-10 10:14:05,950 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-09-10 10:14:18,669 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-10 10:14:18,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:14:18,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:14:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:14:18,701 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:14:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:14:18,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:14:18,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 20 [2018-09-10 10:14:18,760 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:14:18,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-10 10:14:18,760 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-10 10:14:18,761 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2018-09-10 10:14:18,761 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 11 states. [2018-09-10 10:14:19,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:14:19,557 INFO L93 Difference]: Finished difference Result 152 states and 173 transitions. [2018-09-10 10:14:19,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:14:19,558 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2018-09-10 10:14:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:14:19,559 INFO L225 Difference]: With dead ends: 152 [2018-09-10 10:14:19,561 INFO L226 Difference]: Without dead ends: 97 [2018-09-10 10:14:19,562 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2018-09-10 10:14:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-10 10:14:19,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2018-09-10 10:14:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-10 10:14:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2018-09-10 10:14:19,588 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 48 [2018-09-10 10:14:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:14:19,589 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2018-09-10 10:14:19,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-10 10:14:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2018-09-10 10:14:19,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-10 10:14:19,590 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:14:19,590 INFO L376 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:14:19,592 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:14:19,593 INFO L82 PathProgramCache]: Analyzing trace with hash 126188275, now seen corresponding path program 7 times [2018-09-10 10:14:19,593 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:14:19,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:14:19,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:14:19,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:14:19,594 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:14:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:14:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:14:19,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:14:19,888 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 10:14:19,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:14:19,898 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:14:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:14:19,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:14:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:14:19,955 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:14:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:14:23,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:14:23,885 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 10:14:23,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:14:23,900 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:14:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:14:24,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:14:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:14:24,064 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:14:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:14:24,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:14:24,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 22 [2018-09-10 10:14:24,114 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:14:24,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-10 10:14:24,115 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-10 10:14:24,115 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2018-09-10 10:14:24,116 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 12 states. [2018-09-10 10:14:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:14:25,025 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2018-09-10 10:14:25,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 10:14:25,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2018-09-10 10:14:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:14:25,027 INFO L225 Difference]: With dead ends: 165 [2018-09-10 10:14:25,027 INFO L226 Difference]: Without dead ends: 105 [2018-09-10 10:14:25,028 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2018-09-10 10:14:25,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-10 10:14:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2018-09-10 10:14:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-10 10:14:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2018-09-10 10:14:25,045 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 51 [2018-09-10 10:14:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:14:25,045 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2018-09-10 10:14:25,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-10 10:14:25,045 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2018-09-10 10:14:25,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-10 10:14:25,047 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:14:25,047 INFO L376 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:14:25,047 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:14:25,048 INFO L82 PathProgramCache]: Analyzing trace with hash -481300284, now seen corresponding path program 8 times [2018-09-10 10:14:25,048 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:14:25,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:14:25,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:14:25,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:14:25,049 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:14:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:14:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:14:25,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:14:25,515 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 10:14:25,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 10:14:25,524 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:14:25,544 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 10:14:25,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:14:25,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:14:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:14:25,560 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:14:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 152 refuted. 3 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:14:37,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:14:37,690 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 10:14:37,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 10:14:37,710 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:14:37,789 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 10:14:37,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:14:37,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:14:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:14:37,803 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:14:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 152 refuted. 3 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:14:37,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:14:37,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 24 [2018-09-10 10:14:37,837 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:14:37,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 10:14:37,838 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 10:14:37,838 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=383, Unknown=3, NotChecked=0, Total=552 [2018-09-10 10:14:37,838 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand 13 states. [2018-09-10 10:14:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:14:39,128 INFO L93 Difference]: Finished difference Result 178 states and 203 transitions. [2018-09-10 10:14:39,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-10 10:14:39,129 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2018-09-10 10:14:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:14:39,130 INFO L225 Difference]: With dead ends: 178 [2018-09-10 10:14:39,130 INFO L226 Difference]: Without dead ends: 113 [2018-09-10 10:14:39,131 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=166, Invalid=383, Unknown=3, NotChecked=0, Total=552 [2018-09-10 10:14:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-10 10:14:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2018-09-10 10:14:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-10 10:14:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2018-09-10 10:14:39,148 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 54 [2018-09-10 10:14:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:14:39,148 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2018-09-10 10:14:39,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 10:14:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2018-09-10 10:14:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-10 10:14:39,149 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:14:39,149 INFO L376 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:14:39,150 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:14:39,150 INFO L82 PathProgramCache]: Analyzing trace with hash 819223891, now seen corresponding path program 9 times [2018-09-10 10:14:39,150 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:14:39,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:14:39,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:14:39,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:14:39,151 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:14:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:14:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 2 proven. 187 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:14:39,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:14:39,544 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 10:14:39,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-10 10:14:39,555 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-10 10:15:10,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-10 10:15:10,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:15:10,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:15:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:15:10,827 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:15:12,919 WARN L175 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:15:19,008 WARN L175 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 14 [2018-09-10 10:15:38,077 WARN L175 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:15:54,567 WARN L1032 $PredicateComparison]: unable to prove that (or (< (mod (+ c_main_~index~0 6) 4294967296) 1000) (<= 1000 (mod (+ c_main_~index~0 5) 4294967296))) is different from true [2018-09-10 10:16:03,095 WARN L175 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:16:06,709 WARN L175 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:16:09,611 WARN L175 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:16:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 2 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 32 not checked. [2018-09-10 10:16:09,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:16:09,629 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 10:16:09,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-10 10:16:09,646 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-10 10:16:58,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-10 10:16:58,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:16:58,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:16:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:16:58,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:17:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 2 proven. 187 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:17:34,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:17:34,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19, 14, 14] total 41 [2018-09-10 10:17:34,131 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:17:34,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-10 10:17:34,132 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-10 10:17:34,132 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=1104, Unknown=17, NotChecked=76, Total=1640 [2018-09-10 10:17:34,133 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand 14 states. [2018-09-10 10:17:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:17:35,634 INFO L93 Difference]: Finished difference Result 191 states and 218 transitions. [2018-09-10 10:17:35,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-10 10:17:35,637 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2018-09-10 10:17:35,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:17:35,638 INFO L225 Difference]: With dead ends: 191 [2018-09-10 10:17:35,638 INFO L226 Difference]: Without dead ends: 121 [2018-09-10 10:17:35,639 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 193 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 94.7s TimeCoverageRelationStatistics Valid=443, Invalid=1104, Unknown=17, NotChecked=76, Total=1640 [2018-09-10 10:17:35,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-10 10:17:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2018-09-10 10:17:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-10 10:17:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2018-09-10 10:17:35,653 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 57 [2018-09-10 10:17:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:17:35,654 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2018-09-10 10:17:35,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-10 10:17:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2018-09-10 10:17:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-10 10:17:35,657 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:17:35,657 INFO L376 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:17:35,657 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:17:35,657 INFO L82 PathProgramCache]: Analyzing trace with hash -165055900, now seen corresponding path program 10 times [2018-09-10 10:17:35,658 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:17:35,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:35,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:17:35,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:35,659 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:17:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:17:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 2 proven. 222 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:17:35,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:17:35,969 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 10:17:35,978 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-10 10:17:35,979 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-10 10:17:36,011 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-10 10:17:36,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:17:36,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:17:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:17:36,064 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:17:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 2 proven. 222 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:17:48,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:17:48,315 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 10:17:48,330 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-10 10:17:48,330 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-10 10:17:48,479 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-10 10:17:48,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:17:48,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:17:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:17:48,507 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:17:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 2 proven. 222 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:17:48,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:17:48,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15] total 28 [2018-09-10 10:17:48,550 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:17:48,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-10 10:17:48,551 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-10 10:17:48,551 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=532, Unknown=2, NotChecked=0, Total=756 [2018-09-10 10:17:48,551 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand 15 states. [2018-09-10 10:17:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:17:49,413 INFO L93 Difference]: Finished difference Result 204 states and 233 transitions. [2018-09-10 10:17:49,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 10:17:49,413 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2018-09-10 10:17:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:17:49,414 INFO L225 Difference]: With dead ends: 204 [2018-09-10 10:17:49,415 INFO L226 Difference]: Without dead ends: 129 [2018-09-10 10:17:49,415 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=222, Invalid=532, Unknown=2, NotChecked=0, Total=756 [2018-09-10 10:17:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-10 10:17:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2018-09-10 10:17:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-10 10:17:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2018-09-10 10:17:49,430 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 60 [2018-09-10 10:17:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:17:49,430 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2018-09-10 10:17:49,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-10 10:17:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2018-09-10 10:17:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-10 10:17:49,432 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:17:49,432 INFO L376 BasicCegarLoop]: trace histogram [14, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:17:49,432 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:17:49,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1102579789, now seen corresponding path program 11 times [2018-09-10 10:17:49,432 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:17:49,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:49,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:17:49,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:17:49,433 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:17:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:17:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 2 proven. 260 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:17:49,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:17:49,730 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 10:17:49,741 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-10 10:17:49,741 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:17:52,355 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-10 10:17:52,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:17:52,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:17:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:17:52,383 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 2 proven. 260 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:18:00,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:00,848 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 10:18:00,864 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-10 10:18:00,865 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 10:18:03,379 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-10 10:18:03,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 10:18:03,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:18:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:18:03,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:18:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 2 proven. 260 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (25)] Exception during sending of exit command (exit): Broken pipe [2018-09-10 10:18:03,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:18:03,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16] total 30 [2018-09-10 10:18:03,471 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:18:03,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-10 10:18:03,472 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-10 10:18:03,473 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=616, Unknown=1, NotChecked=0, Total=870 [2018-09-10 10:18:03,473 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand 16 states. [2018-09-10 10:18:04,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:18:04,732 INFO L93 Difference]: Finished difference Result 217 states and 248 transitions. [2018-09-10 10:18:04,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-10 10:18:04,733 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2018-09-10 10:18:04,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:18:04,734 INFO L225 Difference]: With dead ends: 217 [2018-09-10 10:18:04,734 INFO L226 Difference]: Without dead ends: 137 [2018-09-10 10:18:04,735 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 236 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=253, Invalid=616, Unknown=1, NotChecked=0, Total=870 [2018-09-10 10:18:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-10 10:18:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2018-09-10 10:18:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-10 10:18:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 149 transitions. [2018-09-10 10:18:04,750 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 149 transitions. Word has length 63 [2018-09-10 10:18:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:18:04,750 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 149 transitions. [2018-09-10 10:18:04,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-10 10:18:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 149 transitions. [2018-09-10 10:18:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-10 10:18:04,751 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:18:04,751 INFO L376 BasicCegarLoop]: trace histogram [15, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:18:04,752 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_crafted_simple_array_index_value_true_unreach_call__true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:18:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash -704431100, now seen corresponding path program 12 times [2018-09-10 10:18:04,752 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:18:04,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:04,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 10:18:04,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:18:04,753 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:18:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:18:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 2 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-10 10:18:06,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:18:06,263 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 10:18:06,272 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-10 10:18:06,272 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown