java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 10:58:07,461 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 10:58:07,463 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 10:58:07,476 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 10:58:07,477 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 10:58:07,478 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 10:58:07,479 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 10:58:07,481 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 10:58:07,483 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 10:58:07,484 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 10:58:07,485 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 10:58:07,485 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 10:58:07,486 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 10:58:07,487 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 10:58:07,488 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 10:58:07,489 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 10:58:07,490 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 10:58:07,492 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 10:58:07,494 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 10:58:07,496 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 10:58:07,498 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 10:58:07,499 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 10:58:07,502 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 10:58:07,502 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 10:58:07,502 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 10:58:07,504 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 10:58:07,505 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 10:58:07,506 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 10:58:07,506 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 10:58:07,508 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 10:58:07,508 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 10:58:07,509 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 10:58:07,509 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 10:58:07,509 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 10:58:07,510 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 10:58:07,511 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 10:58:07,511 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 [2018-07-24 10:58:07,539 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 10:58:07,539 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 10:58:07,540 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 10:58:07,540 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 10:58:07,540 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 10:58:07,541 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 10:58:07,541 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 10:58:07,541 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 10:58:07,541 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 10:58:07,541 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 10:58:07,542 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 10:58:07,542 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 10:58:07,543 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 10:58:07,543 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 10:58:07,543 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 10:58:07,543 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 10:58:07,543 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 10:58:07,544 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 10:58:07,544 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 10:58:07,544 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 10:58:07,544 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 10:58:07,544 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 10:58:07,544 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 10:58:07,545 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 10:58:07,545 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 10:58:07,545 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 10:58:07,545 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 10:58:07,545 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 10:58:07,546 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 10:58:07,546 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 10:58:07,546 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 10:58:07,546 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 10:58:07,546 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 10:58:07,612 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 10:58:07,626 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 10:58:07,630 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 10:58:07,632 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 10:58:07,633 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 10:58:07,633 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c [2018-07-24 10:58:07,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d5a1b9e4/3ed8d2df768845e6929258de70236044/FLAGf4fa2d396 [2018-07-24 10:58:08,176 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 10:58:08,177 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c [2018-07-24 10:58:08,185 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d5a1b9e4/3ed8d2df768845e6929258de70236044/FLAGf4fa2d396 [2018-07-24 10:58:08,201 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d5a1b9e4/3ed8d2df768845e6929258de70236044 [2018-07-24 10:58:08,213 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 10:58:08,214 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 10:58:08,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 10:58:08,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 10:58:08,223 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 10:58:08,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 10:58:08" (1/1) ... [2018-07-24 10:58:08,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40879b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08, skipping insertion in model container [2018-07-24 10:58:08,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 10:58:08" (1/1) ... [2018-07-24 10:58:08,421 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 10:58:08,475 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 10:58:08,494 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 10:58:08,510 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 10:58:08,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08 WrapperNode [2018-07-24 10:58:08,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 10:58:08,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 10:58:08,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 10:58:08,538 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 10:58:08,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08" (1/1) ... [2018-07-24 10:58:08,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08" (1/1) ... [2018-07-24 10:58:08,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 10:58:08,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 10:58:08,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 10:58:08,566 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 10:58:08,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08" (1/1) ... [2018-07-24 10:58:08,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08" (1/1) ... [2018-07-24 10:58:08,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08" (1/1) ... [2018-07-24 10:58:08,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08" (1/1) ... [2018-07-24 10:58:08,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08" (1/1) ... [2018-07-24 10:58:08,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08" (1/1) ... [2018-07-24 10:58:08,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08" (1/1) ... [2018-07-24 10:58:08,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 10:58:08,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 10:58:08,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 10:58:08,601 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 10:58:08,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08" (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 [2018-07-24 10:58:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 10:58:08,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 10:58:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__nondet [2018-07-24 10:58:08,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__nondet [2018-07-24 10:58:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 10:58:08,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 10:58:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 10:58:08,685 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 10:58:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assert [2018-07-24 10:58:08,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assert [2018-07-24 10:58:09,100 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 10:58:09,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 10:58:09 BoogieIcfgContainer [2018-07-24 10:58:09,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 10:58:09,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 10:58:09,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 10:58:09,116 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 10:58:09,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 10:58:08" (1/3) ... [2018-07-24 10:58:09,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7001db0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 10:58:09, skipping insertion in model container [2018-07-24 10:58:09,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:58:08" (2/3) ... [2018-07-24 10:58:09,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7001db0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 10:58:09, skipping insertion in model container [2018-07-24 10:58:09,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 10:58:09" (3/3) ... [2018-07-24 10:58:09,124 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call.c [2018-07-24 10:58:09,138 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 10:58:09,150 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 10:58:09,205 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 10:58:09,206 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 10:58:09,206 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 10:58:09,206 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 10:58:09,206 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 10:58:09,206 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 10:58:09,207 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 10:58:09,207 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 10:58:09,207 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 10:58:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-07-24 10:58:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-24 10:58:09,233 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:09,234 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:09,234 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1030098894, now seen corresponding path program 1 times [2018-07-24 10:58:09,243 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:09,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:09,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:09,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:09,294 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:09,385 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:58:09,386 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-24 10:58:09,386 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:58:09,393 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-24 10:58:09,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-24 10:58:09,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-24 10:58:09,414 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-07-24 10:58:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:09,447 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2018-07-24 10:58:09,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-24 10:58:09,449 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-07-24 10:58:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:09,459 INFO L225 Difference]: With dead ends: 44 [2018-07-24 10:58:09,460 INFO L226 Difference]: Without dead ends: 25 [2018-07-24 10:58:09,464 INFO L573 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 [2018-07-24 10:58:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-24 10:58:09,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-07-24 10:58:09,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-24 10:58:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2018-07-24 10:58:09,503 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2018-07-24 10:58:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:09,504 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2018-07-24 10:58:09,504 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-24 10:58:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2018-07-24 10:58:09,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-24 10:58:09,505 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:09,505 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:09,506 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:09,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1176183033, now seen corresponding path program 1 times [2018-07-24 10:58:09,507 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:09,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:09,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:09,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:09,509 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:09,582 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:58:09,582 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 10:58:09,582 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:58:09,587 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 10:58:09,588 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 10:58:09,588 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 10:58:09,589 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2018-07-24 10:58:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:09,719 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2018-07-24 10:58:09,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 10:58:09,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2018-07-24 10:58:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:09,721 INFO L225 Difference]: With dead ends: 46 [2018-07-24 10:58:09,721 INFO L226 Difference]: Without dead ends: 31 [2018-07-24 10:58:09,722 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 10:58:09,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-24 10:58:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-07-24 10:58:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-24 10:58:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-07-24 10:58:09,735 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2018-07-24 10:58:09,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:09,735 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-07-24 10:58:09,735 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 10:58:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-07-24 10:58:09,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-24 10:58:09,737 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:09,737 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:09,738 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:09,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1045124110, now seen corresponding path program 1 times [2018-07-24 10:58:09,738 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:09,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:09,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:09,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:09,739 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:09,827 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:09,827 INFO L191 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 [2018-07-24 10:58:09,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:09,844 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:09,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-24 10:58:09,925 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-24 10:58:10,019 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 10:58:10,020 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2018-07-24 10:58:10,020 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:58:10,020 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 10:58:10,020 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 10:58:10,021 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-24 10:58:10,021 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2018-07-24 10:58:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:10,125 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2018-07-24 10:58:10,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 10:58:10,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2018-07-24 10:58:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:10,130 INFO L225 Difference]: With dead ends: 53 [2018-07-24 10:58:10,131 INFO L226 Difference]: Without dead ends: 36 [2018-07-24 10:58:10,132 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-24 10:58:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-24 10:58:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-07-24 10:58:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-24 10:58:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2018-07-24 10:58:10,154 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2018-07-24 10:58:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:10,155 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2018-07-24 10:58:10,155 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 10:58:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2018-07-24 10:58:10,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-24 10:58:10,156 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:10,157 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:10,157 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:10,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1102382412, now seen corresponding path program 1 times [2018-07-24 10:58:10,157 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:10,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:10,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:10,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:10,160 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:10,211 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:10,211 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:10,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:10,222 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:10,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:10,260 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:10,510 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:10,510 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:10,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:10,529 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:10,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:10,565 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:10,617 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:10,618 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 6 [2018-07-24 10:58:10,618 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:10,618 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 10:58:10,619 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 10:58:10,619 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-24 10:58:10,619 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 4 states. [2018-07-24 10:58:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:10,719 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2018-07-24 10:58:10,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 10:58:10,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-07-24 10:58:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:10,721 INFO L225 Difference]: With dead ends: 69 [2018-07-24 10:58:10,721 INFO L226 Difference]: Without dead ends: 46 [2018-07-24 10:58:10,722 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-24 10:58:10,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-07-24 10:58:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2018-07-24 10:58:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-24 10:58:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2018-07-24 10:58:10,729 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2018-07-24 10:58:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:10,729 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2018-07-24 10:58:10,730 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 10:58:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2018-07-24 10:58:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-24 10:58:10,731 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:10,731 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:10,731 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:10,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1808032045, now seen corresponding path program 2 times [2018-07-24 10:58:10,732 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:10,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:10,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:10,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:10,733 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:10,806 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:10,806 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:10,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:58:10,821 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:10,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:58:10,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:10,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:10,871 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:11,062 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:11,062 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:11,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:58:11,080 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:11,113 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:58:11,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:11,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:11,125 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:11,158 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:11,158 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-07-24 10:58:11,158 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:11,159 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 10:58:11,159 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 10:58:11,159 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-24 10:58:11,160 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2018-07-24 10:58:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:11,245 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2018-07-24 10:58:11,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 10:58:11,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-07-24 10:58:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:11,247 INFO L225 Difference]: With dead ends: 84 [2018-07-24 10:58:11,248 INFO L226 Difference]: Without dead ends: 54 [2018-07-24 10:58:11,249 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-24 10:58:11,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-24 10:58:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2018-07-24 10:58:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-07-24 10:58:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2018-07-24 10:58:11,256 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 28 [2018-07-24 10:58:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:11,257 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2018-07-24 10:58:11,257 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 10:58:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2018-07-24 10:58:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-24 10:58:11,258 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:11,258 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:11,259 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1489232678, now seen corresponding path program 3 times [2018-07-24 10:58:11,259 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:11,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:11,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:11,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:11,261 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:11,359 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:11,359 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-07-24 10:58:11,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:58:11,377 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:11,420 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-07-24 10:58:11,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:11,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:11,711 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 10:58:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-07-24 10:58:11,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-07-24 10:58:12,203 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 10:58:12,203 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 8] total 19 [2018-07-24 10:58:12,204 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:58:12,204 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 10:58:12,204 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 10:58:12,205 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2018-07-24 10:58:12,205 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 9 states. [2018-07-24 10:58:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:12,409 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2018-07-24 10:58:12,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 10:58:12,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2018-07-24 10:58:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:12,414 INFO L225 Difference]: With dead ends: 88 [2018-07-24 10:58:12,415 INFO L226 Difference]: Without dead ends: 86 [2018-07-24 10:58:12,415 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2018-07-24 10:58:12,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-07-24 10:58:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2018-07-24 10:58:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-24 10:58:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2018-07-24 10:58:12,429 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 32 [2018-07-24 10:58:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:12,429 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2018-07-24 10:58:12,429 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 10:58:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2018-07-24 10:58:12,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-24 10:58:12,431 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:12,431 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:12,431 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:12,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1153463970, now seen corresponding path program 1 times [2018-07-24 10:58:12,432 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:12,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:12,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:12,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:12,433 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:12,534 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:12,535 INFO L191 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 [2018-07-24 10:58:12,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:12,542 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:12,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:12,570 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:12,738 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:12,739 INFO L191 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 [2018-07-24 10:58:12,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:12,755 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:12,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:12,794 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:12,905 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:12,905 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-07-24 10:58:12,905 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:12,906 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 10:58:12,906 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 10:58:12,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-24 10:58:12,907 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 6 states. [2018-07-24 10:58:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:13,073 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2018-07-24 10:58:13,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 10:58:13,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2018-07-24 10:58:13,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:13,082 INFO L225 Difference]: With dead ends: 155 [2018-07-24 10:58:13,082 INFO L226 Difference]: Without dead ends: 108 [2018-07-24 10:58:13,083 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-24 10:58:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-07-24 10:58:13,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2018-07-24 10:58:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-24 10:58:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2018-07-24 10:58:13,108 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 32 [2018-07-24 10:58:13,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:13,108 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2018-07-24 10:58:13,108 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 10:58:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2018-07-24 10:58:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-24 10:58:13,113 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:13,113 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:13,113 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:13,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1043573733, now seen corresponding path program 2 times [2018-07-24 10:58:13,114 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:13,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:13,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:13,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:13,116 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:13,212 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:13,213 INFO L191 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 [2018-07-24 10:58:13,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:58:13,221 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:13,251 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:58:13,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:13,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:13,322 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:13,564 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:13,564 INFO L191 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 [2018-07-24 10:58:13,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:58:13,582 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:13,615 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:58:13,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:13,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:13,627 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:13,681 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:13,681 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 7, 7] total 16 [2018-07-24 10:58:13,681 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:13,682 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 10:58:13,682 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 10:58:13,682 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2018-07-24 10:58:13,683 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand 9 states. [2018-07-24 10:58:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:14,064 INFO L93 Difference]: Finished difference Result 233 states and 296 transitions. [2018-07-24 10:58:14,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 10:58:14,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2018-07-24 10:58:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:14,067 INFO L225 Difference]: With dead ends: 233 [2018-07-24 10:58:14,068 INFO L226 Difference]: Without dead ends: 178 [2018-07-24 10:58:14,069 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2018-07-24 10:58:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-07-24 10:58:14,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2018-07-24 10:58:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-24 10:58:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 175 transitions. [2018-07-24 10:58:14,086 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 175 transitions. Word has length 36 [2018-07-24 10:58:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:14,086 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 175 transitions. [2018-07-24 10:58:14,086 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 10:58:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 175 transitions. [2018-07-24 10:58:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-24 10:58:14,088 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:14,088 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:14,088 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:14,089 INFO L82 PathProgramCache]: Analyzing trace with hash 229978860, now seen corresponding path program 3 times [2018-07-24 10:58:14,089 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:14,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:14,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:14,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:14,090 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:14,187 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:14,187 INFO L191 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 [2018-07-24 10:58:14,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:58:14,195 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:58:14,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-07-24 10:58:14,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:14,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-07-24 10:58:14,447 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-07-24 10:58:14,770 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 10:58:14,770 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 9] total 22 [2018-07-24 10:58:14,771 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:58:14,771 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 10:58:14,772 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 10:58:14,772 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2018-07-24 10:58:14,772 INFO L87 Difference]: Start difference. First operand 143 states and 175 transitions. Second operand 9 states. [2018-07-24 10:58:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:15,182 INFO L93 Difference]: Finished difference Result 153 states and 186 transitions. [2018-07-24 10:58:15,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 10:58:15,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2018-07-24 10:58:15,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:15,185 INFO L225 Difference]: With dead ends: 153 [2018-07-24 10:58:15,185 INFO L226 Difference]: Without dead ends: 151 [2018-07-24 10:58:15,186 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2018-07-24 10:58:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-24 10:58:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 143. [2018-07-24 10:58:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-24 10:58:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 175 transitions. [2018-07-24 10:58:15,202 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 175 transitions. Word has length 40 [2018-07-24 10:58:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:15,203 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 175 transitions. [2018-07-24 10:58:15,203 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 10:58:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 175 transitions. [2018-07-24 10:58:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-24 10:58:15,205 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:15,205 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:15,205 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:15,205 INFO L82 PathProgramCache]: Analyzing trace with hash 228131818, now seen corresponding path program 1 times [2018-07-24 10:58:15,205 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:15,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:15,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:15,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:15,207 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-07-24 10:58:15,253 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:58:15,253 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 10:58:15,253 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:58:15,253 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 10:58:15,254 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 10:58:15,254 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 10:58:15,254 INFO L87 Difference]: Start difference. First operand 143 states and 175 transitions. Second operand 3 states. [2018-07-24 10:58:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:15,286 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2018-07-24 10:58:15,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 10:58:15,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2018-07-24 10:58:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:15,288 INFO L225 Difference]: With dead ends: 219 [2018-07-24 10:58:15,288 INFO L226 Difference]: Without dead ends: 149 [2018-07-24 10:58:15,289 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 10:58:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-24 10:58:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2018-07-24 10:58:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-24 10:58:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 175 transitions. [2018-07-24 10:58:15,303 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 175 transitions. Word has length 40 [2018-07-24 10:58:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:15,304 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 175 transitions. [2018-07-24 10:58:15,304 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 10:58:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 175 transitions. [2018-07-24 10:58:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-24 10:58:15,306 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:15,306 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:15,306 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash 285390120, now seen corresponding path program 1 times [2018-07-24 10:58:15,313 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:15,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:15,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:15,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:15,314 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:15,412 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:15,413 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:15,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:15,423 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:15,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:15,450 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:15,581 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:15,582 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:15,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:15,599 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:15,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 10:58:15,888 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 10:58:15,934 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-07-24 10:58:15,935 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [8, 8, 8] total 18 [2018-07-24 10:58:15,935 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:58:15,935 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 10:58:15,935 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 10:58:15,936 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2018-07-24 10:58:15,936 INFO L87 Difference]: Start difference. First operand 143 states and 175 transitions. Second operand 4 states. [2018-07-24 10:58:16,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:16,011 INFO L93 Difference]: Finished difference Result 285 states and 350 transitions. [2018-07-24 10:58:16,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 10:58:16,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2018-07-24 10:58:16,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:16,014 INFO L225 Difference]: With dead ends: 285 [2018-07-24 10:58:16,014 INFO L226 Difference]: Without dead ends: 181 [2018-07-24 10:58:16,015 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2018-07-24 10:58:16,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-24 10:58:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 160. [2018-07-24 10:58:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-24 10:58:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 185 transitions. [2018-07-24 10:58:16,029 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 185 transitions. Word has length 40 [2018-07-24 10:58:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:16,030 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 185 transitions. [2018-07-24 10:58:16,030 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 10:58:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 185 transitions. [2018-07-24 10:58:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-07-24 10:58:16,033 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:16,033 INFO L353 BasicCegarLoop]: trace histogram [12, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:16,033 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:16,034 INFO L82 PathProgramCache]: Analyzing trace with hash -631971868, now seen corresponding path program 1 times [2018-07-24 10:58:16,034 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:16,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:16,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:16,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:16,035 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 126 proven. 50 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-07-24 10:58:16,224 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:16,224 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:16,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:16,238 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:16,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 124 proven. 50 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-07-24 10:58:16,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 126 proven. 50 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-07-24 10:58:16,608 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:16,608 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:16,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:16,624 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:16,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 124 proven. 50 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-07-24 10:58:16,677 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 126 proven. 50 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-07-24 10:58:16,723 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:16,723 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 14 [2018-07-24 10:58:16,724 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:16,724 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 10:58:16,724 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 10:58:16,724 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-24 10:58:16,725 INFO L87 Difference]: Start difference. First operand 160 states and 185 transitions. Second operand 8 states. [2018-07-24 10:58:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:16,866 INFO L93 Difference]: Finished difference Result 310 states and 365 transitions. [2018-07-24 10:58:16,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 10:58:16,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2018-07-24 10:58:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:16,872 INFO L225 Difference]: With dead ends: 310 [2018-07-24 10:58:16,872 INFO L226 Difference]: Without dead ends: 207 [2018-07-24 10:58:16,873 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-24 10:58:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-07-24 10:58:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 186. [2018-07-24 10:58:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-07-24 10:58:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 214 transitions. [2018-07-24 10:58:16,885 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 214 transitions. Word has length 71 [2018-07-24 10:58:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:16,885 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 214 transitions. [2018-07-24 10:58:16,885 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 10:58:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 214 transitions. [2018-07-24 10:58:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-24 10:58:16,887 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:16,888 INFO L353 BasicCegarLoop]: trace histogram [14, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:16,888 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:16,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1426940796, now seen corresponding path program 2 times [2018-07-24 10:58:16,888 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:16,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:16,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:16,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:16,890 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 174 proven. 72 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-07-24 10:58:17,229 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:17,229 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:17,236 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:58:17,237 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:17,277 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:58:17,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:17,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 172 proven. 72 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 10:58:17,297 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 174 proven. 72 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-07-24 10:58:17,446 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:17,446 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:17,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:58:17,462 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:17,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:58:17,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:17,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 172 proven. 72 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 10:58:17,525 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 174 proven. 72 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-07-24 10:58:17,569 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:17,569 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 16 [2018-07-24 10:58:17,569 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:17,569 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 10:58:17,570 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 10:58:17,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-24 10:58:17,572 INFO L87 Difference]: Start difference. First operand 186 states and 214 transitions. Second operand 9 states. [2018-07-24 10:58:17,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:17,977 INFO L93 Difference]: Finished difference Result 353 states and 413 transitions. [2018-07-24 10:58:17,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 10:58:17,977 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2018-07-24 10:58:17,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:17,979 INFO L225 Difference]: With dead ends: 353 [2018-07-24 10:58:17,979 INFO L226 Difference]: Without dead ends: 235 [2018-07-24 10:58:17,980 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-24 10:58:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-07-24 10:58:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 214. [2018-07-24 10:58:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-07-24 10:58:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 245 transitions. [2018-07-24 10:58:17,992 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 245 transitions. Word has length 79 [2018-07-24 10:58:17,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:17,993 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 245 transitions. [2018-07-24 10:58:17,993 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 10:58:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 245 transitions. [2018-07-24 10:58:17,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-24 10:58:17,995 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:17,995 INFO L353 BasicCegarLoop]: trace histogram [16, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:17,995 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:17,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1137647580, now seen corresponding path program 3 times [2018-07-24 10:58:17,995 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:17,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:17,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:17,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:17,997 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 230 proven. 98 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-07-24 10:58:18,152 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:18,152 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:18,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:58:18,160 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:58:18,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-07-24 10:58:18,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:18,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 28 proven. 231 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-07-24 10:58:18,563 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2018-07-24 10:58:18,842 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:18,843 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:18,859 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:58:18,859 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:58:18,892 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-07-24 10:58:18,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:18,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 28 proven. 231 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-07-24 10:58:18,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2018-07-24 10:58:18,982 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:18,982 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8, 10, 8] total 24 [2018-07-24 10:58:18,982 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:18,982 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-24 10:58:18,983 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-24 10:58:18,983 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-07-24 10:58:18,984 INFO L87 Difference]: Start difference. First operand 214 states and 245 transitions. Second operand 18 states. [2018-07-24 10:58:20,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:20,058 INFO L93 Difference]: Finished difference Result 561 states and 660 transitions. [2018-07-24 10:58:20,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-24 10:58:20,059 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2018-07-24 10:58:20,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:20,063 INFO L225 Difference]: With dead ends: 561 [2018-07-24 10:58:20,063 INFO L226 Difference]: Without dead ends: 427 [2018-07-24 10:58:20,064 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=358, Invalid=1282, Unknown=0, NotChecked=0, Total=1640 [2018-07-24 10:58:20,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-07-24 10:58:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 393. [2018-07-24 10:58:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-07-24 10:58:20,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 451 transitions. [2018-07-24 10:58:20,088 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 451 transitions. Word has length 87 [2018-07-24 10:58:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:20,089 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 451 transitions. [2018-07-24 10:58:20,089 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-24 10:58:20,089 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 451 transitions. [2018-07-24 10:58:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-07-24 10:58:20,092 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:20,092 INFO L353 BasicCegarLoop]: trace histogram [18, 16, 16, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:20,093 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash 220500928, now seen corresponding path program 1 times [2018-07-24 10:58:20,093 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:20,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:20,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:20,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:20,095 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 294 proven. 128 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-07-24 10:58:20,394 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:20,394 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:20,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:20,403 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:20,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 292 proven. 128 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-07-24 10:58:20,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 294 proven. 128 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-07-24 10:58:20,618 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:20,619 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:20,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:20,634 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:20,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 292 proven. 128 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-07-24 10:58:20,702 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 294 proven. 128 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (22)] Exception during sending of exit command (exit): Broken pipe [2018-07-24 10:58:20,758 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:20,759 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 20 [2018-07-24 10:58:20,759 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:20,759 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 10:58:20,759 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 10:58:20,759 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-24 10:58:20,760 INFO L87 Difference]: Start difference. First operand 393 states and 451 transitions. Second operand 11 states. [2018-07-24 10:58:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:20,914 INFO L93 Difference]: Finished difference Result 755 states and 875 transitions. [2018-07-24 10:58:20,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 10:58:20,915 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2018-07-24 10:58:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:20,918 INFO L225 Difference]: With dead ends: 755 [2018-07-24 10:58:20,918 INFO L226 Difference]: Without dead ends: 454 [2018-07-24 10:58:20,920 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-24 10:58:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2018-07-24 10:58:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 421. [2018-07-24 10:58:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2018-07-24 10:58:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 482 transitions. [2018-07-24 10:58:20,946 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 482 transitions. Word has length 95 [2018-07-24 10:58:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:20,946 INFO L471 AbstractCegarLoop]: Abstraction has 421 states and 482 transitions. [2018-07-24 10:58:20,946 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 10:58:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 482 transitions. [2018-07-24 10:58:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-24 10:58:20,949 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:20,949 INFO L353 BasicCegarLoop]: trace histogram [20, 18, 18, 17, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:20,949 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:20,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1128818920, now seen corresponding path program 2 times [2018-07-24 10:58:20,950 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:20,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:20,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:20,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:20,951 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 366 proven. 162 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2018-07-24 10:58:21,737 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:21,737 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:21,746 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:58:21,747 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:21,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:58:21,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:21,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 364 proven. 162 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-07-24 10:58:21,807 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 366 proven. 162 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2018-07-24 10:58:22,030 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:22,031 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 24 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 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:22,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:58:22,047 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:22,105 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:58:22,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:22,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 364 proven. 162 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-07-24 10:58:22,123 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 366 proven. 162 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2018-07-24 10:58:22,165 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:22,165 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 22 [2018-07-24 10:58:22,166 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:22,166 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-24 10:58:22,166 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-24 10:58:22,166 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-24 10:58:22,167 INFO L87 Difference]: Start difference. First operand 421 states and 482 transitions. Second operand 12 states. [2018-07-24 10:58:22,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:22,436 INFO L93 Difference]: Finished difference Result 818 states and 949 transitions. [2018-07-24 10:58:22,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 10:58:22,444 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 103 [2018-07-24 10:58:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:22,447 INFO L225 Difference]: With dead ends: 818 [2018-07-24 10:58:22,448 INFO L226 Difference]: Without dead ends: 501 [2018-07-24 10:58:22,449 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-24 10:58:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2018-07-24 10:58:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 465. [2018-07-24 10:58:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2018-07-24 10:58:22,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 531 transitions. [2018-07-24 10:58:22,479 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 531 transitions. Word has length 103 [2018-07-24 10:58:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:22,480 INFO L471 AbstractCegarLoop]: Abstraction has 465 states and 531 transitions. [2018-07-24 10:58:22,480 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-24 10:58:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 531 transitions. [2018-07-24 10:58:22,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-24 10:58:22,482 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:22,483 INFO L353 BasicCegarLoop]: trace histogram [22, 20, 20, 19, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:22,483 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:22,483 INFO L82 PathProgramCache]: Analyzing trace with hash 991510920, now seen corresponding path program 3 times [2018-07-24 10:58:22,483 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:22,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:22,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:22,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:22,484 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 446 proven. 200 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2018-07-24 10:58:22,675 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:22,675 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:22,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:58:22,686 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:58:22,705 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-07-24 10:58:22,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:22,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 40 proven. 447 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-07-24 10:58:22,912 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 4 proven. 81 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2018-07-24 10:58:23,169 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:23,169 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 26 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 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:23,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:58:23,185 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:58:23,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-07-24 10:58:23,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:23,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 40 proven. 447 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-07-24 10:58:23,248 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 4 proven. 81 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2018-07-24 10:58:23,333 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:23,333 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9, 10, 9] total 28 [2018-07-24 10:58:23,333 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:23,334 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-24 10:58:23,334 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-24 10:58:23,334 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2018-07-24 10:58:23,335 INFO L87 Difference]: Start difference. First operand 465 states and 531 transitions. Second operand 21 states. [2018-07-24 10:58:25,637 WARN L169 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-07-24 10:58:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:25,916 INFO L93 Difference]: Finished difference Result 913 states and 1058 transitions. [2018-07-24 10:58:25,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-24 10:58:25,917 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 111 [2018-07-24 10:58:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:25,920 INFO L225 Difference]: With dead ends: 913 [2018-07-24 10:58:25,920 INFO L226 Difference]: Without dead ends: 564 [2018-07-24 10:58:25,923 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=802, Invalid=3104, Unknown=0, NotChecked=0, Total=3906 [2018-07-24 10:58:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2018-07-24 10:58:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 525. [2018-07-24 10:58:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-07-24 10:58:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 598 transitions. [2018-07-24 10:58:25,948 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 598 transitions. Word has length 111 [2018-07-24 10:58:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:25,948 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 598 transitions. [2018-07-24 10:58:25,948 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-24 10:58:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 598 transitions. [2018-07-24 10:58:25,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-24 10:58:25,950 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:25,950 INFO L353 BasicCegarLoop]: trace histogram [24, 22, 22, 21, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:25,950 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash 991101856, now seen corresponding path program 4 times [2018-07-24 10:58:25,951 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:25,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:25,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:25,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:25,952 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 534 proven. 242 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-07-24 10:58:26,096 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:26,096 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:26,103 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:58:26,104 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:58:26,137 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:58:26,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:26,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 149 proven. 872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:26,465 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 74 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:26,977 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:26,977 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 28 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 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:26,993 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:58:26,993 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:58:27,043 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:58:27,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:27,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 149 proven. 872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:27,073 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 74 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:58:27,202 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:27,202 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 25, 25, 25] total 48 [2018-07-24 10:58:27,202 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:27,203 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-24 10:58:27,203 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-24 10:58:27,204 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2018-07-24 10:58:27,204 INFO L87 Difference]: Start difference. First operand 525 states and 598 transitions. Second operand 37 states. [2018-07-24 10:58:28,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:28,573 INFO L93 Difference]: Finished difference Result 1205 states and 1399 transitions. [2018-07-24 10:58:28,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-24 10:58:28,577 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 119 [2018-07-24 10:58:28,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:28,581 INFO L225 Difference]: With dead ends: 1205 [2018-07-24 10:58:28,581 INFO L226 Difference]: Without dead ends: 808 [2018-07-24 10:58:28,585 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 423 SyntacticMatches, 20 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=361, Invalid=1991, Unknown=0, NotChecked=0, Total=2352 [2018-07-24 10:58:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2018-07-24 10:58:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 760. [2018-07-24 10:58:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-07-24 10:58:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 847 transitions. [2018-07-24 10:58:28,626 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 847 transitions. Word has length 119 [2018-07-24 10:58:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:28,626 INFO L471 AbstractCegarLoop]: Abstraction has 760 states and 847 transitions. [2018-07-24 10:58:28,626 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-24 10:58:28,626 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 847 transitions. [2018-07-24 10:58:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-24 10:58:28,628 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:28,628 INFO L353 BasicCegarLoop]: trace histogram [26, 24, 24, 23, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:28,628 INFO L414 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:28,629 INFO L82 PathProgramCache]: Analyzing trace with hash 670469184, now seen corresponding path program 5 times [2018-07-24 10:58:28,629 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:28,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:28,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:28,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:28,630 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 630 proven. 288 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2018-07-24 10:58:29,020 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:29,020 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:29,029 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-24 10:58:29,029 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:29,061 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-07-24 10:58:29,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:29,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 628 proven. 288 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2018-07-24 10:58:29,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 630 proven. 288 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2018-07-24 10:58:29,825 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:29,825 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 30 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 30 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:29,841 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-24 10:58:29,842 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:29,976 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-07-24 10:58:29,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:29,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 628 proven. 288 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2018-07-24 10:58:29,999 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 630 proven. 288 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2018-07-24 10:58:30,069 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:30,069 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15] total 28 [2018-07-24 10:58:30,069 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:30,070 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 10:58:30,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 10:58:30,071 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-24 10:58:30,071 INFO L87 Difference]: Start difference. First operand 760 states and 847 transitions. Second operand 15 states. [2018-07-24 10:58:30,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:30,236 INFO L93 Difference]: Finished difference Result 1483 states and 1667 transitions. [2018-07-24 10:58:30,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 10:58:30,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 127 [2018-07-24 10:58:30,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:30,246 INFO L225 Difference]: With dead ends: 1483 [2018-07-24 10:58:30,246 INFO L226 Difference]: Without dead ends: 870 [2018-07-24 10:58:30,248 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-24 10:58:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2018-07-24 10:58:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 824. [2018-07-24 10:58:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 824 states. [2018-07-24 10:58:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 916 transitions. [2018-07-24 10:58:30,290 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 916 transitions. Word has length 127 [2018-07-24 10:58:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:30,291 INFO L471 AbstractCegarLoop]: Abstraction has 824 states and 916 transitions. [2018-07-24 10:58:30,291 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 10:58:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 916 transitions. [2018-07-24 10:58:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-24 10:58:30,293 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:30,293 INFO L353 BasicCegarLoop]: trace histogram [28, 26, 26, 25, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:30,294 INFO L414 AbstractCegarLoop]: === Iteration 20 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:30,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2081070048, now seen corresponding path program 6 times [2018-07-24 10:58:30,294 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:30,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:30,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:30,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:30,295 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 734 proven. 338 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2018-07-24 10:58:31,446 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:31,446 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:31,456 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-24 10:58:31,457 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-07-24 10:58:31,476 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-07-24 10:58:31,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:31,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 52 proven. 735 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2018-07-24 10:58:31,668 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 5 proven. 104 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2018-07-24 10:58:31,898 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:31,898 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 32 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 32 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:31,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-24 10:58:31,917 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-07-24 10:58:31,958 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-07-24 10:58:31,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:31,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 749 proven. 38 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2018-07-24 10:58:32,410 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 737 proven. 50 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2018-07-24 10:58:32,617 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:32,617 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8, 9, 9] total 40 [2018-07-24 10:58:32,617 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:32,617 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-24 10:58:32,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-24 10:58:32,619 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1257, Unknown=0, NotChecked=0, Total=1560 [2018-07-24 10:58:32,619 INFO L87 Difference]: Start difference. First operand 824 states and 916 transitions. Second operand 24 states. [2018-07-24 10:58:33,574 WARN L169 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-07-24 10:58:34,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:34,294 INFO L93 Difference]: Finished difference Result 1853 states and 2078 transitions. [2018-07-24 10:58:34,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-24 10:58:34,295 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 135 [2018-07-24 10:58:34,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:34,301 INFO L225 Difference]: With dead ends: 1853 [2018-07-24 10:58:34,301 INFO L226 Difference]: Without dead ends: 1192 [2018-07-24 10:58:34,305 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 515 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1012, Invalid=3680, Unknown=0, NotChecked=0, Total=4692 [2018-07-24 10:58:34,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2018-07-24 10:58:34,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1065. [2018-07-24 10:58:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2018-07-24 10:58:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1182 transitions. [2018-07-24 10:58:34,359 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1182 transitions. Word has length 135 [2018-07-24 10:58:34,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:34,359 INFO L471 AbstractCegarLoop]: Abstraction has 1065 states and 1182 transitions. [2018-07-24 10:58:34,360 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-24 10:58:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1182 transitions. [2018-07-24 10:58:34,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-24 10:58:34,362 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:34,362 INFO L353 BasicCegarLoop]: trace histogram [31, 29, 29, 27, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:34,363 INFO L414 AbstractCegarLoop]: === Iteration 21 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:34,363 INFO L82 PathProgramCache]: Analyzing trace with hash -843776373, now seen corresponding path program 1 times [2018-07-24 10:58:34,363 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:34,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:34,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:34,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:34,364 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 904 proven. 392 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2018-07-24 10:58:34,592 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:34,592 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:34,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:34,603 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:34,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 902 proven. 392 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2018-07-24 10:58:34,656 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 904 proven. 392 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2018-07-24 10:58:35,482 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:35,482 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 34 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 34 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:35,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:35,498 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:58:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:35,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 902 proven. 392 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2018-07-24 10:58:35,596 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 904 proven. 392 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2018-07-24 10:58:35,646 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:35,646 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17] total 32 [2018-07-24 10:58:35,646 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:35,646 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 10:58:35,647 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 10:58:35,647 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-24 10:58:35,647 INFO L87 Difference]: Start difference. First operand 1065 states and 1182 transitions. Second operand 17 states. [2018-07-24 10:58:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:36,057 INFO L93 Difference]: Finished difference Result 2115 states and 2358 transitions. [2018-07-24 10:58:36,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-24 10:58:36,057 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 147 [2018-07-24 10:58:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:36,064 INFO L225 Difference]: With dead ends: 2115 [2018-07-24 10:58:36,064 INFO L226 Difference]: Without dead ends: 1229 [2018-07-24 10:58:36,067 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-24 10:58:36,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2018-07-24 10:58:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1125. [2018-07-24 10:58:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1125 states. [2018-07-24 10:58:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1247 transitions. [2018-07-24 10:58:36,126 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1247 transitions. Word has length 147 [2018-07-24 10:58:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:36,127 INFO L471 AbstractCegarLoop]: Abstraction has 1125 states and 1247 transitions. [2018-07-24 10:58:36,127 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 10:58:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1247 transitions. [2018-07-24 10:58:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-24 10:58:36,130 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:36,130 INFO L353 BasicCegarLoop]: trace histogram [32, 30, 30, 28, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:36,130 INFO L414 AbstractCegarLoop]: === Iteration 22 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:36,131 INFO L82 PathProgramCache]: Analyzing trace with hash 75349156, now seen corresponding path program 2 times [2018-07-24 10:58:36,131 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:36,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:36,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:58:36,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:36,132 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 966 proven. 450 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2018-07-24 10:58:36,434 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:36,434 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:36,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:58:36,442 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:36,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:58:36,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:36,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 7 proven. 1365 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2018-07-24 10:58:36,581 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 6 proven. 1366 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2018-07-24 10:58:37,269 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:37,269 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 36 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 36 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:37,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:58:37,286 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:37,367 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:58:37,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:37,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 7 proven. 1365 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2018-07-24 10:58:37,402 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 6 proven. 1366 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2018-07-24 10:58:37,515 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:37,515 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19, 19, 19] total 37 [2018-07-24 10:58:37,515 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:37,515 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 10:58:37,516 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 10:58:37,516 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=792, Unknown=0, NotChecked=0, Total=1332 [2018-07-24 10:58:37,516 INFO L87 Difference]: Start difference. First operand 1125 states and 1247 transitions. Second operand 20 states. [2018-07-24 10:58:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:38,032 INFO L93 Difference]: Finished difference Result 2314 states and 2615 transitions. [2018-07-24 10:58:38,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-24 10:58:38,033 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 151 [2018-07-24 10:58:38,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:38,038 INFO L225 Difference]: With dead ends: 2314 [2018-07-24 10:58:38,038 INFO L226 Difference]: Without dead ends: 1384 [2018-07-24 10:58:38,042 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1100, Invalid=1656, Unknown=0, NotChecked=0, Total=2756 [2018-07-24 10:58:38,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2018-07-24 10:58:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 853. [2018-07-24 10:58:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2018-07-24 10:58:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 972 transitions. [2018-07-24 10:58:38,100 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 972 transitions. Word has length 151 [2018-07-24 10:58:38,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:38,100 INFO L471 AbstractCegarLoop]: Abstraction has 853 states and 972 transitions. [2018-07-24 10:58:38,100 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-24 10:58:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 972 transitions. [2018-07-24 10:58:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-24 10:58:38,102 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:38,103 INFO L353 BasicCegarLoop]: trace histogram [34, 32, 32, 30, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:38,103 INFO L414 AbstractCegarLoop]: === Iteration 23 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:38,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1093377724, now seen corresponding path program 3 times [2018-07-24 10:58:38,103 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:38,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:38,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:38,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:38,105 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 1094 proven. 512 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2018-07-24 10:58:38,513 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:38,513 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:38,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:58:38,523 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:58:38,540 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-07-24 10:58:38,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:38,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 64 proven. 1095 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2018-07-24 10:58:38,713 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 4 proven. 129 refuted. 0 times theorem prover too weak. 1988 trivial. 0 not checked. [2018-07-24 10:58:39,144 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:39,145 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 38 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 38 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:39,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:58:39,160 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:58:39,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-07-24 10:58:39,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:39,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 64 proven. 1095 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2018-07-24 10:58:39,262 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 4 proven. 129 refuted. 0 times theorem prover too weak. 1988 trivial. 0 not checked. [2018-07-24 10:58:39,328 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:39,329 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 9, 10, 9] total 34 [2018-07-24 10:58:39,329 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:39,329 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-24 10:58:39,330 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-24 10:58:39,330 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2018-07-24 10:58:39,330 INFO L87 Difference]: Start difference. First operand 853 states and 972 transitions. Second operand 27 states. [2018-07-24 10:58:41,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:41,255 INFO L93 Difference]: Finished difference Result 1761 states and 2016 transitions. [2018-07-24 10:58:41,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-24 10:58:41,255 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 159 [2018-07-24 10:58:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:41,259 INFO L225 Difference]: With dead ends: 1761 [2018-07-24 10:58:41,259 INFO L226 Difference]: Without dead ends: 1076 [2018-07-24 10:58:41,263 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1612, Invalid=5870, Unknown=0, NotChecked=0, Total=7482 [2018-07-24 10:58:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2018-07-24 10:58:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 910. [2018-07-24 10:58:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2018-07-24 10:58:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1031 transitions. [2018-07-24 10:58:41,327 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1031 transitions. Word has length 159 [2018-07-24 10:58:41,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:41,327 INFO L471 AbstractCegarLoop]: Abstraction has 910 states and 1031 transitions. [2018-07-24 10:58:41,327 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-24 10:58:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1031 transitions. [2018-07-24 10:58:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-07-24 10:58:41,330 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:41,331 INFO L353 BasicCegarLoop]: trace histogram [54, 51, 51, 51, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:41,331 INFO L414 AbstractCegarLoop]: === Iteration 24 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:41,331 INFO L82 PathProgramCache]: Analyzing trace with hash 312030396, now seen corresponding path program 4 times [2018-07-24 10:58:41,331 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:41,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:41,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:41,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:41,332 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5435 backedges. 2460 proven. 578 refuted. 0 times theorem prover too weak. 2397 trivial. 0 not checked. [2018-07-24 10:58:41,639 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:41,639 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:41,647 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:58:41,647 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:58:41,697 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:58:41,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:41,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5435 backedges. 2456 proven. 578 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2018-07-24 10:58:41,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5435 backedges. 2460 proven. 578 refuted. 0 times theorem prover too weak. 2397 trivial. 0 not checked. [2018-07-24 10:58:43,017 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:43,017 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 40 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 40 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:43,033 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:58:43,033 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:58:43,155 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:58:43,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:43,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5435 backedges. 2456 proven. 578 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2018-07-24 10:58:43,205 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5435 backedges. 2460 proven. 578 refuted. 0 times theorem prover too weak. 2397 trivial. 0 not checked. [2018-07-24 10:58:43,470 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:43,471 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20] total 38 [2018-07-24 10:58:43,471 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:43,474 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 10:58:43,475 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 10:58:43,475 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-24 10:58:43,476 INFO L87 Difference]: Start difference. First operand 910 states and 1031 transitions. Second operand 20 states. [2018-07-24 10:58:43,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:43,904 INFO L93 Difference]: Finished difference Result 1828 states and 2074 transitions. [2018-07-24 10:58:43,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-24 10:58:43,906 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 246 [2018-07-24 10:58:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:43,911 INFO L225 Difference]: With dead ends: 1828 [2018-07-24 10:58:43,912 INFO L226 Difference]: Without dead ends: 1101 [2018-07-24 10:58:43,914 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 966 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-24 10:58:43,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2018-07-24 10:58:43,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 887. [2018-07-24 10:58:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2018-07-24 10:58:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 996 transitions. [2018-07-24 10:58:43,989 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 996 transitions. Word has length 246 [2018-07-24 10:58:43,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:43,990 INFO L471 AbstractCegarLoop]: Abstraction has 887 states and 996 transitions. [2018-07-24 10:58:43,990 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-24 10:58:43,990 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 996 transitions. [2018-07-24 10:58:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-07-24 10:58:43,993 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:43,994 INFO L353 BasicCegarLoop]: trace histogram [57, 54, 54, 54, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:43,994 INFO L414 AbstractCegarLoop]: === Iteration 25 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:43,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1761836637, now seen corresponding path program 5 times [2018-07-24 10:58:43,994 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:43,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:43,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:43,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:43,995 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6077 backedges. 2748 proven. 648 refuted. 0 times theorem prover too weak. 2681 trivial. 0 not checked. [2018-07-24 10:58:44,751 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:44,751 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:44,768 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-24 10:58:44,769 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:44,927 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-07-24 10:58:44,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:44,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6077 backedges. 2744 proven. 648 refuted. 0 times theorem prover too weak. 2685 trivial. 0 not checked. [2018-07-24 10:58:44,981 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6077 backedges. 2748 proven. 648 refuted. 0 times theorem prover too weak. 2681 trivial. 0 not checked. [2018-07-24 10:58:45,621 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:45,621 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 42 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 42 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:45,636 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-24 10:58:45,637 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:58:45,868 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-07-24 10:58:45,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:45,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6077 backedges. 2744 proven. 648 refuted. 0 times theorem prover too weak. 2685 trivial. 0 not checked. [2018-07-24 10:58:45,923 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6077 backedges. 2748 proven. 648 refuted. 0 times theorem prover too weak. 2681 trivial. 0 not checked. [2018-07-24 10:58:46,150 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:46,151 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 21] total 40 [2018-07-24 10:58:46,151 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:46,151 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-24 10:58:46,152 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-24 10:58:46,152 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-24 10:58:46,152 INFO L87 Difference]: Start difference. First operand 887 states and 996 transitions. Second operand 21 states. [2018-07-24 10:58:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:46,349 INFO L93 Difference]: Finished difference Result 1673 states and 1893 transitions. [2018-07-24 10:58:46,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-24 10:58:46,350 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 258 [2018-07-24 10:58:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:46,353 INFO L225 Difference]: With dead ends: 1673 [2018-07-24 10:58:46,353 INFO L226 Difference]: Without dead ends: 985 [2018-07-24 10:58:46,355 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1051 GetRequests, 1013 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-24 10:58:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2018-07-24 10:58:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 943. [2018-07-24 10:58:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2018-07-24 10:58:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1057 transitions. [2018-07-24 10:58:46,432 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1057 transitions. Word has length 258 [2018-07-24 10:58:46,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:46,432 INFO L471 AbstractCegarLoop]: Abstraction has 943 states and 1057 transitions. [2018-07-24 10:58:46,432 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-24 10:58:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1057 transitions. [2018-07-24 10:58:46,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-07-24 10:58:46,436 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:58:46,436 INFO L353 BasicCegarLoop]: trace histogram [60, 57, 57, 57, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:58:46,436 INFO L414 AbstractCegarLoop]: === Iteration 26 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:58:46,437 INFO L82 PathProgramCache]: Analyzing trace with hash 540666890, now seen corresponding path program 6 times [2018-07-24 10:58:46,437 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:58:46,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:46,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:58:46,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:58:46,438 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:58:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:58:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6755 backedges. 3052 proven. 722 refuted. 0 times theorem prover too weak. 2981 trivial. 0 not checked. [2018-07-24 10:58:47,401 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:47,401 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:58:47,409 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-24 10:58:47,410 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-07-24 10:58:47,472 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-07-24 10:58:47,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:47,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6755 backedges. 3134 proven. 1 refuted. 0 times theorem prover too weak. 3620 trivial. 0 not checked. [2018-07-24 10:58:48,110 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6755 backedges. 3060 proven. 75 refuted. 0 times theorem prover too weak. 3620 trivial. 0 not checked. [2018-07-24 10:58:48,356 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:58:48,356 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 44 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 44 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:58:48,373 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-24 10:58:48,373 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-07-24 10:58:48,425 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-07-24 10:58:48,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:58:48,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:58:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6755 backedges. 3134 proven. 1 refuted. 0 times theorem prover too weak. 3620 trivial. 0 not checked. [2018-07-24 10:58:48,483 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:58:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6755 backedges. 3060 proven. 75 refuted. 0 times theorem prover too weak. 3620 trivial. 0 not checked. [2018-07-24 10:58:48,633 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:58:48,634 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 9, 10, 9] total 34 [2018-07-24 10:58:48,634 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:58:48,634 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-24 10:58:48,635 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-24 10:58:48,635 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=812, Unknown=0, NotChecked=0, Total=1122 [2018-07-24 10:58:48,636 INFO L87 Difference]: Start difference. First operand 943 states and 1057 transitions. Second operand 30 states. [2018-07-24 10:58:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:58:49,768 INFO L93 Difference]: Finished difference Result 1799 states and 2043 transitions. [2018-07-24 10:58:49,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-24 10:58:49,769 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 270 [2018-07-24 10:58:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:58:49,769 INFO L225 Difference]: With dead ends: 1799 [2018-07-24 10:58:49,769 INFO L226 Difference]: Without dead ends: 0 [2018-07-24 10:58:49,775 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1141 GetRequests, 1086 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=858, Invalid=2112, Unknown=0, NotChecked=0, Total=2970 [2018-07-24 10:58:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-07-24 10:58:49,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-07-24 10:58:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-07-24 10:58:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-07-24 10:58:49,776 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 270 [2018-07-24 10:58:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:58:49,777 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-07-24 10:58:49,777 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-24 10:58:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-07-24 10:58:49,777 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-07-24 10:58:49,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-07-24 10:58:51,651 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:51,683 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:51,751 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:51,765 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:51,828 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:51,855 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,049 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,105 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,163 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,183 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,255 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,439 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,461 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,510 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,635 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,651 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,805 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,815 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,892 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,901 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:52,962 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:53,007 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:53,043 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 10:58:53,159 WARN L169 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 1009 DAG size of output: 446 [2018-07-24 10:58:53,419 WARN L169 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 1 [2018-07-24 10:58:53,983 WARN L169 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2018-07-24 10:58:54,139 WARN L169 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2018-07-24 10:58:57,424 WARN L169 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 420 DAG size of output: 23 [2018-07-24 10:58:57,427 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-07-24 10:58:57,428 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-07-24 10:58:57,428 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-07-24 10:58:57,428 INFO L424 ceAbstractionStarter]: At program point __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__nondetENTRY(lines 15 19) the Hoare annotation is: true [2018-07-24 10:58:57,428 INFO L421 ceAbstractionStarter]: For program point __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__nondetFINAL(lines 15 19) no Hoare annotation was computed. [2018-07-24 10:58:57,428 INFO L421 ceAbstractionStarter]: For program point __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__nondetEXIT(lines 15 19) no Hoare annotation was computed. [2018-07-24 10:58:57,428 INFO L417 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (<= ~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__last~0 3) [2018-07-24 10:58:57,429 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-07-24 10:58:57,429 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-07-24 10:58:57,429 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-07-24 10:58:57,429 INFO L421 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-07-24 10:58:57,429 INFO L421 ceAbstractionStarter]: For program point L24(lines 24 34) no Hoare annotation was computed. [2018-07-24 10:58:57,429 INFO L421 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-07-24 10:58:57,429 INFO L421 ceAbstractionStarter]: For program point L26(lines 26 27) no Hoare annotation was computed. [2018-07-24 10:58:57,429 INFO L417 ceAbstractionStarter]: At program point L31'(lines 31 32) the Hoare annotation is: (or (and (= main_~b~0 main_~a~0) (<= 200000 main_~c~0) (<= main_~c~0 200000)) (< 3 |old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__last~0)|)) [2018-07-24 10:58:57,429 INFO L421 ceAbstractionStarter]: For program point L26''''(lines 24 34) no Hoare annotation was computed. [2018-07-24 10:58:57,429 INFO L421 ceAbstractionStarter]: For program point L24''(lines 21 35) no Hoare annotation was computed. [2018-07-24 10:58:57,429 INFO L417 ceAbstractionStarter]: At program point L33(lines 24 34) the Hoare annotation is: (or (and (= main_~b~0 0) (= main_~c~0 0) (= main_~a~0 0)) (and (= main_~b~0 main_~a~0) (<= 200000 main_~c~0) (<= main_~c~0 200000)) (< 3 |old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__last~0)|)) [2018-07-24 10:58:57,429 INFO L421 ceAbstractionStarter]: For program point mainEXIT(lines 21 35) no Hoare annotation was computed. [2018-07-24 10:58:57,430 INFO L417 ceAbstractionStarter]: At program point mainENTRY(lines 21 35) the Hoare annotation is: (or (<= ~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__last~0 3) (< 3 |old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__last~0)|)) [2018-07-24 10:58:57,430 INFO L421 ceAbstractionStarter]: For program point L26''(lines 26 27) no Hoare annotation was computed. [2018-07-24 10:58:57,430 INFO L421 ceAbstractionStarter]: For program point L28'(lines 24 34) no Hoare annotation was computed. [2018-07-24 10:58:57,430 INFO L417 ceAbstractionStarter]: At program point L26'''(lines 26 27) the Hoare annotation is: (let ((.cse1 (<= main_~c~0 200000)) (.cse0 (= main_~b~0 main_~a~0))) (or (and .cse0 .cse1 (<= 1 main_~st~0)) (< 3 |old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__last~0)|) (and .cse0 (<= (+ ~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__last~0 1) main_~c~0) .cse1) (and .cse0 (<= main_~c~0 15) (<= ~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__last~0 3)))) [2018-07-24 10:58:57,430 INFO L421 ceAbstractionStarter]: For program point __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertErr0AssertViolationERROR_FUNCTION(line 10) no Hoare annotation was computed. [2018-07-24 10:58:57,430 INFO L424 ceAbstractionStarter]: At program point __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertENTRY(lines 8 13) the Hoare annotation is: true [2018-07-24 10:58:57,430 INFO L421 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2018-07-24 10:58:57,430 INFO L421 ceAbstractionStarter]: For program point L9(lines 9 11) no Hoare annotation was computed. [2018-07-24 10:58:57,430 INFO L421 ceAbstractionStarter]: For program point __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c____VERIFIER_assertEXIT(lines 8 13) no Hoare annotation was computed. [2018-07-24 10:58:57,430 INFO L421 ceAbstractionStarter]: For program point L9''(lines 8 13) no Hoare annotation was computed. [2018-07-24 10:58:57,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 10:58:57 BoogieIcfgContainer [2018-07-24 10:58:57,445 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 10:58:57,446 INFO L168 Benchmark]: Toolchain (without parser) took 49233.13 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-07-24 10:58:57,447 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 10:58:57,448 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 10:58:57,448 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.78 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 10:58:57,449 INFO L168 Benchmark]: Boogie Preprocessor took 34.58 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 10:58:57,449 INFO L168 Benchmark]: RCFGBuilder took 500.35 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.3 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2018-07-24 10:58:57,450 INFO L168 Benchmark]: TraceAbstraction took 48335.12 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 540.5 MB). Free memory was 2.2 GB in the beginning and 2.8 GB in the end (delta: -554.4 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-07-24 10:58:57,453 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 321.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 27.78 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.58 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 500.35 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.3 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 48335.12 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 540.5 MB). Free memory was 2.2 GB in the beginning and 2.8 GB in the end (delta: -554.4 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((b == 0 && c == 0) && a == 0) || ((b == a && 200000 <= c) && c <= 200000)) || 3 < \old(__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__last) - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: ((((b == a && c <= 200000) && 1 <= st) || 3 < \old(__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__last)) || ((b == a && __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__last + 1 <= c) && c <= 200000)) || ((b == a && c <= 15) && __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_industry_pattern_nested_true_unreach_call_c__last <= 3) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. SAFE Result, 48.2s OverallTime, 26 OverallIterations, 60 TraceHistogramMax, 14.3s AutomataDifference, 0.0s DeadEndRemovalTime, 7.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 742 SDtfs, 1499 SDslu, 4761 SDs, 0 SdLazy, 4802 SolverSat, 204 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9907 GetRequests, 9187 SyntacticMatches, 25 SemanticMatches, 695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 22.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1125occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 26 MinimizatonAttempts, 1561 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 162 PreInvPairs, 430 NumberOfFragments, 92 HoareAnnotationTreeSize, 162 FomulaSimplifications, 3487597 FormulaSimplificationTreeSizeReduction, 3.3s HoareSimplificationTime, 9 FomulaSimplificationsInter, 355765 FormulaSimplificationTreeSizeReductionInter, 4.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 21.2s InterpolantComputationTime, 7225 NumberOfCodeBlocks, 5879 NumberOfCodeBlocksAsserted, 157 NumberOfCheckSat, 11845 ConstructedInterpolants, 0 QuantifiedInterpolants, 4056477 SizeOfPredicates, 128 NumberOfNonLiveVariables, 5952 ConjunctsInSsa, 634 ConjunctsInUnsatCore, 112 InterpolantComputations, 9 PerfectInterpolantSequences, 125468/154425 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_10-58-57-466.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_10-58-57-466.csv Received shutdown request...