java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 11:24:06,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 11:24:06,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 11:24:06,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 11:24:06,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 11:24:06,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 11:24:06,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 11:24:06,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 11:24:06,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 11:24:06,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 11:24:06,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 11:24:06,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 11:24:06,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 11:24:06,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 11:24:06,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 11:24:06,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 11:24:06,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 11:24:06,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 11:24:06,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 11:24:06,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 11:24:06,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 11:24:06,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 11:24:06,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 11:24:06,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 11:24:06,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 11:24:06,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 11:24:06,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 11:24:06,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 11:24:06,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 11:24:06,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 11:24:06,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 11:24:06,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 11:24:06,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 11:24:06,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 11:24:06,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 11:24:06,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 11:24:06,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-02 11:24:06,599 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 11:24:06,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 11:24:06,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 11:24:06,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 11:24:06,601 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 11:24:06,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 11:24:06,601 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 11:24:06,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 11:24:06,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 11:24:06,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 11:24:06,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 11:24:06,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 11:24:06,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 11:24:06,602 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 11:24:06,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 11:24:06,603 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 11:24:06,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 11:24:06,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 11:24:06,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 11:24:06,604 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 11:24:06,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 11:24:06,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:24:06,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 11:24:06,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 11:24:06,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 11:24:06,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 11:24:06,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 11:24:06,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 11:24:06,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 11:24:06,645 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 11:24:06,657 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 11:24:06,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 11:24:06,662 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 11:24:06,662 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 11:24:06,663 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2019-10-02 11:24:06,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ad815c6c/50e214f493e149209eb92f8d9cc48158/FLAG41033f51a [2019-10-02 11:24:07,211 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 11:24:07,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2019-10-02 11:24:07,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ad815c6c/50e214f493e149209eb92f8d9cc48158/FLAG41033f51a [2019-10-02 11:24:07,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ad815c6c/50e214f493e149209eb92f8d9cc48158 [2019-10-02 11:24:07,589 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 11:24:07,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 11:24:07,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 11:24:07,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 11:24:07,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 11:24:07,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:24:07" (1/1) ... [2019-10-02 11:24:07,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602e7f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:24:07, skipping insertion in model container [2019-10-02 11:24:07,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:24:07" (1/1) ... [2019-10-02 11:24:07,607 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 11:24:07,623 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 11:24:07,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:24:07,875 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 11:24:07,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:24:08,043 INFO L192 MainTranslator]: Completed translation [2019-10-02 11:24:08,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:24:08 WrapperNode [2019-10-02 11:24:08,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 11:24:08,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 11:24:08,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 11:24:08,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 11:24:08,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:24:08" (1/1) ... [2019-10-02 11:24:08,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:24:08" (1/1) ... [2019-10-02 11:24:08,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:24:08" (1/1) ... [2019-10-02 11:24:08,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:24:08" (1/1) ... [2019-10-02 11:24:08,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:24:08" (1/1) ... [2019-10-02 11:24:08,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:24:08" (1/1) ... [2019-10-02 11:24:08,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:24:08" (1/1) ... [2019-10-02 11:24:08,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 11:24:08,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 11:24:08,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 11:24:08,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 11:24:08,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:24:08" (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 [2019-10-02 11:24:08,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 11:24:08,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 11:24:08,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 11:24:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 11:24:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 11:24:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-02 11:24:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-02 11:24:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 11:24:08,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-02 11:24:08,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-02 11:24:08,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 11:24:08,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-02 11:24:08,390 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 11:24:08,390 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-02 11:24:08,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:24:08 BoogieIcfgContainer [2019-10-02 11:24:08,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 11:24:08,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 11:24:08,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 11:24:08,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 11:24:08,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 11:24:07" (1/3) ... [2019-10-02 11:24:08,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384b247a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:24:08, skipping insertion in model container [2019-10-02 11:24:08,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:24:08" (2/3) ... [2019-10-02 11:24:08,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384b247a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:24:08, skipping insertion in model container [2019-10-02 11:24:08,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:24:08" (3/3) ... [2019-10-02 11:24:08,421 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2019-10-02 11:24:08,443 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 11:24:08,457 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 11:24:08,481 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 11:24:08,507 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 11:24:08,508 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 11:24:08,508 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 11:24:08,509 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 11:24:08,509 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 11:24:08,509 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 11:24:08,509 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 11:24:08,509 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 11:24:08,509 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 11:24:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-02 11:24:08,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-02 11:24:08,530 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:08,531 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:08,533 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash 242978043, now seen corresponding path program 1 times [2019-10-02 11:24:08,539 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:08,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:08,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:08,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:08,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:08,679 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:24:08,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 11:24:08,682 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 11:24:08,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 11:24:08,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 11:24:08,695 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-02 11:24:08,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:08,713 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2019-10-02 11:24:08,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 11:24:08,714 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-02 11:24:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:08,722 INFO L225 Difference]: With dead ends: 32 [2019-10-02 11:24:08,723 INFO L226 Difference]: Without dead ends: 15 [2019-10-02 11:24:08,726 INFO L640 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 [2019-10-02 11:24:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-02 11:24:08,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-02 11:24:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-02 11:24:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-10-02 11:24:08,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-10-02 11:24:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:08,763 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-10-02 11:24:08,763 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 11:24:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-10-02 11:24:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-02 11:24:08,764 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:08,764 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:08,765 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:08,765 INFO L82 PathProgramCache]: Analyzing trace with hash 242949213, now seen corresponding path program 1 times [2019-10-02 11:24:08,765 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:08,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:08,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:08,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:08,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:08,860 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:24:08,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 11:24:08,862 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 11:24:08,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 11:24:08,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 11:24:08,862 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2019-10-02 11:24:08,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:08,903 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-10-02 11:24:08,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 11:24:08,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-10-02 11:24:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:08,905 INFO L225 Difference]: With dead ends: 24 [2019-10-02 11:24:08,905 INFO L226 Difference]: Without dead ends: 21 [2019-10-02 11:24:08,906 INFO L640 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 [2019-10-02 11:24:08,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-02 11:24:08,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2019-10-02 11:24:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-02 11:24:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-02 11:24:08,910 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2019-10-02 11:24:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:08,911 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-02 11:24:08,911 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 11:24:08,911 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-02 11:24:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-02 11:24:08,912 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:08,912 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:08,912 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:08,912 INFO L82 PathProgramCache]: Analyzing trace with hash 713101374, now seen corresponding path program 1 times [2019-10-02 11:24:08,913 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:08,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:08,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:08,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:08,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:09,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:24:09,010 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:24:09,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:09,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 11:24:09,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:24:09,103 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:09,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2019-10-02 11:24:09,104 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 11:24:09,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 11:24:09,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-02 11:24:09,105 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-10-02 11:24:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:09,212 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2019-10-02 11:24:09,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 11:24:09,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-02 11:24:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:09,214 INFO L225 Difference]: With dead ends: 48 [2019-10-02 11:24:09,214 INFO L226 Difference]: Without dead ends: 39 [2019-10-02 11:24:09,215 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:24:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-02 11:24:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-10-02 11:24:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-02 11:24:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-02 11:24:09,222 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2019-10-02 11:24:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:09,223 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-02 11:24:09,223 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 11:24:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-02 11:24:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-02 11:24:09,224 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:09,224 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:09,224 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:09,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:09,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1308348629, now seen corresponding path program 1 times [2019-10-02 11:24:09,225 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:09,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:09,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:09,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:09,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 11:24:09,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:24:09,355 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 11:24:09,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 11:24:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:09,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 11:24:09,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-02 11:24:09,444 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:09,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-10-02 11:24:09,445 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 11:24:09,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 11:24:09,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:24:09,446 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2019-10-02 11:24:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:09,641 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2019-10-02 11:24:09,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 11:24:09,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-10-02 11:24:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:09,644 INFO L225 Difference]: With dead ends: 66 [2019-10-02 11:24:09,644 INFO L226 Difference]: Without dead ends: 50 [2019-10-02 11:24:09,645 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:24:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-02 11:24:09,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2019-10-02 11:24:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-02 11:24:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-10-02 11:24:09,654 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 21 [2019-10-02 11:24:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:09,654 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-10-02 11:24:09,655 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 11:24:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-10-02 11:24:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-02 11:24:09,656 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:09,656 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:09,656 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1611011581, now seen corresponding path program 1 times [2019-10-02 11:24:09,657 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:09,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:09,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:09,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:09,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-02 11:24:09,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:24:09,841 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:24:09,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:09,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-02 11:24:09,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:24:09,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 11:24:09,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-10-02 11:24:09,956 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 11:24:09,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 11:24:09,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:24:09,957 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2019-10-02 11:24:10,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:10,030 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2019-10-02 11:24:10,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 11:24:10,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-10-02 11:24:10,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:10,032 INFO L225 Difference]: With dead ends: 73 [2019-10-02 11:24:10,033 INFO L226 Difference]: Without dead ends: 48 [2019-10-02 11:24:10,033 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:24:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-02 11:24:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2019-10-02 11:24:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-02 11:24:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-10-02 11:24:10,048 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 35 [2019-10-02 11:24:10,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:10,048 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-10-02 11:24:10,048 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 11:24:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-10-02 11:24:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-02 11:24:10,051 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:10,051 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:10,051 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:10,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:10,052 INFO L82 PathProgramCache]: Analyzing trace with hash 351043197, now seen corresponding path program 2 times [2019-10-02 11:24:10,052 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:10,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:10,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:10,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:10,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-02 11:24:10,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:24:10,256 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 11:24:10,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 11:24:10,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-02 11:24:10,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:10,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 11:24:10,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-10-02 11:24:10,328 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:10,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-02 11:24:10,329 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 11:24:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 11:24:10,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:24:10,330 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 6 states. [2019-10-02 11:24:10,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:10,411 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2019-10-02 11:24:10,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 11:24:10,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2019-10-02 11:24:10,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:10,413 INFO L225 Difference]: With dead ends: 85 [2019-10-02 11:24:10,413 INFO L226 Difference]: Without dead ends: 0 [2019-10-02 11:24:10,414 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:24:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-02 11:24:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-02 11:24:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-02 11:24:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-02 11:24:10,421 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2019-10-02 11:24:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:10,421 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-02 11:24:10,421 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 11:24:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-02 11:24:10,422 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-02 11:24:10,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-02 11:24:10,483 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-02 11:24:10,483 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-02 11:24:10,483 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-02 11:24:10,483 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-02 11:24:10,484 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-02 11:24:10,484 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-02 11:24:10,484 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-02 11:24:10,484 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 5 21) no Hoare annotation was computed. [2019-10-02 11:24:10,484 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2019-10-02 11:24:10,484 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 5 21) no Hoare annotation was computed. [2019-10-02 11:24:10,484 INFO L443 ceAbstractionStarter]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2019-10-02 11:24:10,485 INFO L439 ceAbstractionStarter]: At program point L11-3(lines 11 13) the Hoare annotation is: (= main_~a~0 1) [2019-10-02 11:24:10,485 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 5 21) the Hoare annotation is: true [2019-10-02 11:24:10,485 INFO L439 ceAbstractionStarter]: At program point L16(lines 6 21) the Hoare annotation is: false [2019-10-02 11:24:10,485 INFO L443 ceAbstractionStarter]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2019-10-02 11:24:10,485 INFO L439 ceAbstractionStarter]: At program point L12-3(lines 12 13) the Hoare annotation is: (= main_~a~0 1) [2019-10-02 11:24:10,486 INFO L443 ceAbstractionStarter]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2019-10-02 11:24:10,486 INFO L439 ceAbstractionStarter]: At program point L10-3(lines 10 13) the Hoare annotation is: (= main_~a~0 1) [2019-10-02 11:24:10,486 INFO L443 ceAbstractionStarter]: For program point L10-4(lines 6 21) no Hoare annotation was computed. [2019-10-02 11:24:10,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:24:10 BoogieIcfgContainer [2019-10-02 11:24:10,502 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-02 11:24:10,507 INFO L168 Benchmark]: Toolchain (without parser) took 2913.51 ms. Allocated memory was 138.9 MB in the beginning and 221.8 MB in the end (delta: 82.8 MB). Free memory was 86.0 MB in the beginning and 100.3 MB in the end (delta: -14.4 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. [2019-10-02 11:24:10,508 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 105.0 MB in the beginning and 104.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-02 11:24:10,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 451.93 ms. Allocated memory was 138.9 MB in the beginning and 198.7 MB in the end (delta: 59.8 MB). Free memory was 85.6 MB in the beginning and 158.9 MB in the end (delta: -73.3 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. [2019-10-02 11:24:10,512 INFO L168 Benchmark]: Boogie Preprocessor took 42.44 ms. Allocated memory is still 198.7 MB. Free memory was 158.9 MB in the beginning and 157.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-10-02 11:24:10,513 INFO L168 Benchmark]: RCFGBuilder took 312.43 ms. Allocated memory is still 198.7 MB. Free memory was 157.5 MB in the beginning and 142.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2019-10-02 11:24:10,518 INFO L168 Benchmark]: TraceAbstraction took 2097.82 ms. Allocated memory was 198.7 MB in the beginning and 221.8 MB in the end (delta: 23.1 MB). Free memory was 142.4 MB in the beginning and 100.3 MB in the end (delta: 42.0 MB). Peak memory consumption was 65.1 MB. Max. memory is 7.1 GB. [2019-10-02 11:24:10,526 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 105.0 MB in the beginning and 104.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 451.93 ms. Allocated memory was 138.9 MB in the beginning and 198.7 MB in the end (delta: 59.8 MB). Free memory was 85.6 MB in the beginning and 158.9 MB in the end (delta: -73.3 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.44 ms. Allocated memory is still 198.7 MB. Free memory was 158.9 MB in the beginning and 157.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.43 ms. Allocated memory is still 198.7 MB. Free memory was 157.5 MB in the beginning and 142.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2097.82 ms. Allocated memory was 198.7 MB in the beginning and 221.8 MB in the end (delta: 23.1 MB). Free memory was 142.4 MB in the beginning and 100.3 MB in the end (delta: 42.0 MB). Peak memory consumption was 65.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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: 10]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. SAFE Result, 1.9s OverallTime, 6 OverallIterations, 8 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 84 SDtfs, 98 SDslu, 145 SDs, 0 SdLazy, 108 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=5, 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: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 38 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 33 NumberOfFragments, 14 HoareAnnotationTreeSize, 8 FomulaSimplifications, 521 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 240 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 12918 SizeOfPredicates, 7 NumberOfNonLiveVariables, 326 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 374/382 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...