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/default/taipan/svcomp-Reach-64bit-Taipan_Default-old.epf -i ../../../trunk/examples/svcomp/loops/n.c11_true-unreach-call_false-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-23 18:07:08,500 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 18:07:08,502 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 18:07:08,515 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 18:07:08,515 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 18:07:08,516 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 18:07:08,518 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 18:07:08,519 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 18:07:08,521 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 18:07:08,522 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 18:07:08,523 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 18:07:08,523 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 18:07:08,524 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 18:07:08,525 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 18:07:08,527 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 18:07:08,528 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 18:07:08,529 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 18:07:08,536 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 18:07:08,541 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 18:07:08,543 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 18:07:08,544 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 18:07:08,545 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 18:07:08,551 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 18:07:08,551 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 18:07:08,551 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 18:07:08,554 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 18:07:08,557 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 18:07:08,559 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 18:07:08,563 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 18:07:08,564 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 18:07:08,565 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 18:07:08,567 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-23 18:07:08,571 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-old.epf [2018-07-23 18:07:08,599 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 18:07:08,600 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 18:07:08,601 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-23 18:07:08,601 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-23 18:07:08,601 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-23 18:07:08,601 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-23 18:07:08,603 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-23 18:07:08,604 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-23 18:07:08,604 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-23 18:07:08,604 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-23 18:07:08,604 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-23 18:07:08,605 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-23 18:07:08,605 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-23 18:07:08,607 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-23 18:07:08,607 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-23 18:07:08,607 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-23 18:07:08,607 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-23 18:07:08,608 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-23 18:07:08,608 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-23 18:07:08,608 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 18:07:08,609 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-23 18:07:08,610 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-23 18:07:08,610 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-23 18:07:08,610 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 18:07:08,610 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 18:07:08,610 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-23 18:07:08,611 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-23 18:07:08,611 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-07-23 18:07:08,611 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-23 18:07:08,611 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-23 18:07:08,611 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 18:07:08,612 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-23 18:07:08,612 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-23 18:07:08,672 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 18:07:08,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 18:07:08,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 18:07:08,693 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-23 18:07:08,693 INFO L276 PluginConnector]: CDTParser initialized [2018-07-23 18:07:08,694 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11_true-unreach-call_false-termination.i [2018-07-23 18:07:09,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73db2bec5/cbab0ad995834b9b99fe5ba07958e067/FLAG9d33fad28 [2018-07-23 18:07:09,199 INFO L276 CDTParser]: Found 1 translation units. [2018-07-23 18:07:09,200 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11_true-unreach-call_false-termination.i [2018-07-23 18:07:09,205 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73db2bec5/cbab0ad995834b9b99fe5ba07958e067/FLAG9d33fad28 [2018-07-23 18:07:09,219 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73db2bec5/cbab0ad995834b9b99fe5ba07958e067 [2018-07-23 18:07:09,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 18:07:09,232 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-23 18:07:09,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-23 18:07:09,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-23 18:07:09,240 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-23 18:07:09,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:07:09" (1/1) ... [2018-07-23 18:07:09,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29cd6f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09, skipping insertion in model container [2018-07-23 18:07:09,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:07:09" (1/1) ... [2018-07-23 18:07:09,430 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-23 18:07:09,471 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 18:07:09,488 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-23 18:07:09,493 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 18:07:09,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09 WrapperNode [2018-07-23 18:07:09,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-23 18:07:09,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-23 18:07:09,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-23 18:07:09,509 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-23 18:07:09,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09" (1/1) ... [2018-07-23 18:07:09,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09" (1/1) ... [2018-07-23 18:07:09,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-23 18:07:09,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 18:07:09,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 18:07:09,532 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 18:07:09,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09" (1/1) ... [2018-07-23 18:07:09,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09" (1/1) ... [2018-07-23 18:07:09,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09" (1/1) ... [2018-07-23 18:07:09,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09" (1/1) ... [2018-07-23 18:07:09,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09" (1/1) ... [2018-07-23 18:07:09,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09" (1/1) ... [2018-07-23 18:07:09,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09" (1/1) ... [2018-07-23 18:07:09,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 18:07:09,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 18:07:09,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 18:07:09,556 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 18:07:09,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09" (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 [2018-07-23 18:07:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-23 18:07:09,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-23 18:07:09,615 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_n_c___true_unreach_call_false_termination_i____VERIFIER_assert [2018-07-23 18:07:09,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_n_c___true_unreach_call_false_termination_i____VERIFIER_assert [2018-07-23 18:07:09,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 18:07:09,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 18:07:09,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-23 18:07:09,616 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-23 18:07:09,896 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 18:07:09,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:07:09 BoogieIcfgContainer [2018-07-23 18:07:09,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 18:07:09,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 18:07:09,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 18:07:09,901 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 18:07:09,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:07:09" (1/3) ... [2018-07-23 18:07:09,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626bca16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:07:09, skipping insertion in model container [2018-07-23 18:07:09,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:07:09" (2/3) ... [2018-07-23 18:07:09,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626bca16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:07:09, skipping insertion in model container [2018-07-23 18:07:09,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:07:09" (3/3) ... [2018-07-23 18:07:09,905 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c11_true-unreach-call_false-termination.i [2018-07-23 18:07:09,916 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-23 18:07:09,924 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 18:07:09,992 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 18:07:09,993 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 18:07:09,993 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 18:07:09,994 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-23 18:07:09,994 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 18:07:09,994 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 18:07:09,994 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 18:07:09,994 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 18:07:09,995 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 18:07:10,016 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-07-23 18:07:10,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 18:07:10,024 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:07:10,025 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:07:10,026 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_n_c___true_unreach_call_false_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:07:10,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1683042458, now seen corresponding path program 1 times [2018-07-23 18:07:10,049 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:07:10,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:07:10,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:07:10,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:07:10,117 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:07:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:07:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:10,174 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 18:07:10,174 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 18:07:10,174 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 18:07:10,178 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-23 18:07:10,191 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-23 18:07:10,191 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 18:07:10,194 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-07-23 18:07:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:07:10,213 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-07-23 18:07:10,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-23 18:07:10,214 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-07-23 18:07:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:07:10,222 INFO L225 Difference]: With dead ends: 33 [2018-07-23 18:07:10,223 INFO L226 Difference]: Without dead ends: 14 [2018-07-23 18:07:10,226 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 [2018-07-23 18:07:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-23 18:07:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-23 18:07:10,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-23 18:07:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-07-23 18:07:10,268 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-07-23 18:07:10,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:07:10,268 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-07-23 18:07:10,268 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-23 18:07:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-07-23 18:07:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-23 18:07:10,269 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:07:10,270 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:07:10,270 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_n_c___true_unreach_call_false_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:07:10,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1081368048, now seen corresponding path program 1 times [2018-07-23 18:07:10,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:07:10,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:07:10,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:07:10,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:07:10,272 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:07:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:07:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:10,405 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 18:07:10,405 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-23 18:07:10,405 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 18:07:10,407 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 18:07:10,408 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 18:07:10,408 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-23 18:07:10,408 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-07-23 18:07:10,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:07:10,528 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-07-23 18:07:10,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 18:07:10,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-07-23 18:07:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:07:10,530 INFO L225 Difference]: With dead ends: 30 [2018-07-23 18:07:10,530 INFO L226 Difference]: Without dead ends: 18 [2018-07-23 18:07:10,531 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-23 18:07:10,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-23 18:07:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-07-23 18:07:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 18:07:10,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-07-23 18:07:10,537 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2018-07-23 18:07:10,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:07:10,537 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-07-23 18:07:10,537 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 18:07:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-07-23 18:07:10,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-23 18:07:10,538 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:07:10,539 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:07:10,540 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_n_c___true_unreach_call_false_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:07:10,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1382198968, now seen corresponding path program 1 times [2018-07-23 18:07:10,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:07:10,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:07:10,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:07:10,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:07:10,542 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:07:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:07:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:10,708 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:07:10,708 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 18:07:10,709 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-07-23 18:07:10,711 INFO L201 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [19], [23], [25], [30], [32], [39], [40], [41], [43] [2018-07-23 18:07:10,764 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 18:07:10,764 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 18:07:10,902 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-07-23 18:07:11,217 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-23 18:07:11,218 INFO L272 AbstractInterpreter]: Visited 14 different actions 104 times. Merged at 5 different actions 50 times. Widened at 1 different actions 6 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-07-23 18:07:11,246 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-23 18:07:11,247 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:07:11,247 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 [2018-07-23 18:07:11,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:07:11,261 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 18:07:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:07:11,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:07:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:11,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:07:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:11,770 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:07:11,770 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 18:07:11,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:07:11,785 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-23 18:07:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:07:11,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:07:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:11,843 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:07:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:11,858 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 18:07:11,858 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-07-23 18:07:11,859 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 18:07:11,859 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 18:07:11,859 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 18:07:11,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-07-23 18:07:11,860 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2018-07-23 18:07:11,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:07:11,927 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-07-23 18:07:11,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 18:07:11,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-07-23 18:07:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:07:11,929 INFO L225 Difference]: With dead ends: 34 [2018-07-23 18:07:11,929 INFO L226 Difference]: Without dead ends: 22 [2018-07-23 18:07:11,930 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-07-23 18:07:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-23 18:07:11,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-07-23 18:07:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-23 18:07:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-07-23 18:07:11,935 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2018-07-23 18:07:11,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:07:11,935 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-07-23 18:07:11,935 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 18:07:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-07-23 18:07:11,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 18:07:11,936 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:07:11,937 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:07:11,937 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_n_c___true_unreach_call_false_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:07:11,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1410541408, now seen corresponding path program 2 times [2018-07-23 18:07:11,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:07:11,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:07:11,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 18:07:11,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:07:11,939 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:07:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:07:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:12,158 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:07:12,158 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 18:07:12,158 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-23 18:07:12,159 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-23 18:07:12,159 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:07:12,159 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 18:07:12,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 18:07:12,169 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-23 18:07:12,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 18:07:12,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 18:07:12,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:07:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:12,248 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:07:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:12,514 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:07:12,514 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 18:07:12,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 18:07:12,530 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-23 18:07:12,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 18:07:12,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 18:07:12,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:07:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:12,569 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:07:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (5)] Exception during sending of exit command (exit): Broken pipe [2018-07-23 18:07:12,586 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 18:07:12,586 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 12 [2018-07-23 18:07:12,586 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 18:07:12,587 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 18:07:12,587 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 18:07:12,588 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-07-23 18:07:12,588 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-07-23 18:07:12,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:07:12,972 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-07-23 18:07:12,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 18:07:12,973 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-07-23 18:07:12,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:07:12,975 INFO L225 Difference]: With dead ends: 42 [2018-07-23 18:07:12,975 INFO L226 Difference]: Without dead ends: 26 [2018-07-23 18:07:12,976 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-07-23 18:07:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-23 18:07:12,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-07-23 18:07:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-23 18:07:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-07-23 18:07:12,982 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2018-07-23 18:07:12,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:07:12,983 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-07-23 18:07:12,983 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 18:07:12,983 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-07-23 18:07:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-23 18:07:12,984 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:07:12,984 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:07:12,984 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_n_c___true_unreach_call_false_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:07:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1576596472, now seen corresponding path program 3 times [2018-07-23 18:07:12,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:07:12,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:07:12,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 18:07:12,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:07:12,986 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:07:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:07:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:13,138 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:07:13,138 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 18:07:13,138 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-23 18:07:13,138 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-23 18:07:13,139 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:07:13,139 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 18:07:13,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 18:07:13,147 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-23 18:07:13,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-23 18:07:13,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 18:07:13,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:07:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:13,193 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:07:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:13,568 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:07:13,569 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-23 18:07:13,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 18:07:13,586 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-23 18:07:13,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-23 18:07:13,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 18:07:13,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:07:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:13,660 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:07:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:13,739 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 18:07:13,739 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8] total 17 [2018-07-23 18:07:13,739 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 18:07:13,740 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 18:07:13,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 18:07:13,741 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-07-23 18:07:13,741 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2018-07-23 18:07:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:07:13,870 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2018-07-23 18:07:13,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 18:07:13,874 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-07-23 18:07:13,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:07:13,875 INFO L225 Difference]: With dead ends: 50 [2018-07-23 18:07:13,875 INFO L226 Difference]: Without dead ends: 30 [2018-07-23 18:07:13,876 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-07-23 18:07:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-23 18:07:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-07-23 18:07:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 18:07:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-07-23 18:07:13,881 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2018-07-23 18:07:13,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:07:13,882 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-07-23 18:07:13,882 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 18:07:13,882 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-07-23 18:07:13,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-23 18:07:13,883 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 18:07:13,883 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 18:07:13,883 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_n_c___true_unreach_call_false_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 18:07:13,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1420319920, now seen corresponding path program 4 times [2018-07-23 18:07:13,884 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 18:07:13,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:07:13,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 18:07:13,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 18:07:13,885 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 18:07:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 18:07:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:14,057 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:07:14,057 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 18:07:14,058 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-23 18:07:14,058 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-23 18:07:14,058 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:07:14,058 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 [2018-07-23 18:07:14,073 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 18:07:14,073 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-23 18:07:14,110 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 18:07:14,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 18:07:14,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:07:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:14,149 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:07:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:14,336 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 18:07:14,336 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 [2018-07-23 18:07:14,352 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 18:07:14,353 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-23 18:07:14,381 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 18:07:14,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 18:07:14,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 18:07:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:14,403 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-23 18:07:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 18:07:14,419 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-23 18:07:14,419 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 16 [2018-07-23 18:07:14,419 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-23 18:07:14,420 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 18:07:14,420 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 18:07:14,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2018-07-23 18:07:14,421 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2018-07-23 18:07:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 18:07:14,543 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2018-07-23 18:07:14,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 18:07:14,543 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2018-07-23 18:07:14,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 18:07:14,544 INFO L225 Difference]: With dead ends: 48 [2018-07-23 18:07:14,544 INFO L226 Difference]: Without dead ends: 0 [2018-07-23 18:07:14,545 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2018-07-23 18:07:14,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-07-23 18:07:14,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-07-23 18:07:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-07-23 18:07:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-07-23 18:07:14,546 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2018-07-23 18:07:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 18:07:14,547 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-07-23 18:07:14,547 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 18:07:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-07-23 18:07:14,547 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-07-23 18:07:14,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-07-23 18:07:14,682 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-07-23 18:07:14,682 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-07-23 18:07:14,682 INFO L421 ceAbstractionStarter]: For program point __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_n_c___true_unreach_call_false_termination_i____VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-07-23 18:07:14,682 INFO L421 ceAbstractionStarter]: For program point L3''(lines 2 7) no Hoare annotation was computed. [2018-07-23 18:07:14,683 INFO L421 ceAbstractionStarter]: For program point __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_n_c___true_unreach_call_false_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-07-23 18:07:14,683 INFO L421 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-07-23 18:07:14,683 INFO L421 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-07-23 18:07:14,683 INFO L424 ceAbstractionStarter]: At program point __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_n_c___true_unreach_call_false_termination_i____VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-07-23 18:07:14,683 INFO L424 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-07-23 18:07:14,683 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-07-23 18:07:14,683 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-07-23 18:07:14,683 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-07-23 18:07:14,684 INFO L417 ceAbstractionStarter]: At program point L13'''(lines 13 18) the Hoare annotation is: (or (and (<= main_~len~0 0) (<= 0 main_~len~0)) (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= 1 main_~len~0) (<= main_~len~0 1)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2018-07-23 18:07:14,684 INFO L417 ceAbstractionStarter]: At program point L13''(lines 13 18) the Hoare annotation is: (or (and (<= main_~len~0 0) (<= 0 main_~len~0)) (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= 1 main_~len~0) (<= main_~len~0 1)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2018-07-23 18:07:14,684 INFO L421 ceAbstractionStarter]: For program point mainFINAL(lines 9 21) no Hoare annotation was computed. [2018-07-23 18:07:14,684 INFO L421 ceAbstractionStarter]: For program point L14''(lines 14 15) no Hoare annotation was computed. [2018-07-23 18:07:14,684 INFO L421 ceAbstractionStarter]: For program point L14(lines 14 15) no Hoare annotation was computed. [2018-07-23 18:07:14,685 INFO L421 ceAbstractionStarter]: For program point L13(lines 13 18) no Hoare annotation was computed. [2018-07-23 18:07:14,685 INFO L421 ceAbstractionStarter]: For program point mainEXIT(lines 9 21) no Hoare annotation was computed. [2018-07-23 18:07:14,685 INFO L424 ceAbstractionStarter]: At program point mainENTRY(lines 9 21) the Hoare annotation is: true [2018-07-23 18:07:14,685 INFO L421 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2018-07-23 18:07:14,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 06:07:14 BoogieIcfgContainer [2018-07-23 18:07:14,696 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 18:07:14,697 INFO L168 Benchmark]: Toolchain (without parser) took 5465.73 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.1 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -485.2 MB). Peak memory consumption was 261.9 MB. Max. memory is 7.1 GB. [2018-07-23 18:07:14,699 INFO L168 Benchmark]: CDTParser took 0.23 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. [2018-07-23 18:07:14,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.66 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. [2018-07-23 18:07:14,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.18 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. [2018-07-23 18:07:14,701 INFO L168 Benchmark]: Boogie Preprocessor took 23.85 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. [2018-07-23 18:07:14,702 INFO L168 Benchmark]: RCFGBuilder took 340.54 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -790.1 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2018-07-23 18:07:14,703 INFO L168 Benchmark]: TraceAbstraction took 4798.79 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 294.3 MB). Peak memory consumption was 294.3 MB. Max. memory is 7.1 GB. [2018-07-23 18:07:14,707 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 274.66 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 23.18 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 23.85 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 340.54 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -790.1 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4798.79 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 294.3 MB). Peak memory consumption was 294.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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: 13]: Loop Invariant Derived loop invariant: ((((len <= 0 && 0 <= len) || (4 <= len && len <= 4)) || (len <= 2 && 2 <= len)) || (1 <= len && len <= 1)) || (len <= 3 && 3 <= len) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 4.7s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 99 SDtfs, 14 SDslu, 336 SDs, 0 SdLazy, 220 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 370 GetRequests, 306 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 77 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 273 NumberOfCodeBlocks, 273 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 419 ConstructedInterpolants, 0 QuantifiedInterpolants, 45165 SizeOfPredicates, 16 NumberOfNonLiveVariables, 312 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 3/300 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/n.c11_true-unreach-call_false-termination.i_svcomp-Reach-64bit-Taipan_Default-old.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-23_18-07-14-721.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/n.c11_true-unreach-call_false-termination.i_svcomp-Reach-64bit-Taipan_Default-old.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_18-07-14-721.csv Received shutdown request...