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/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:02:24,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:02:24,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:02:24,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:02:24,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:02:24,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:02:24,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:02:24,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:02:24,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:02:24,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:02:24,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:02:24,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:02:24,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:02:24,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:02:24,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:02:24,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:02:24,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:02:24,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:02:24,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:02:24,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:02:24,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:02:24,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:02:24,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:02:24,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:02:24,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:02:24,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:02:24,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:02:24,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:02:24,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:02:24,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:02:24,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:02:24,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:02:24,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:02:24,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:02:24,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:02:24,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:02:24,272 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 [2019-09-03 20:02:24,292 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:02:24,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:02:24,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:02:24,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:02:24,294 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:02:24,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:02:24,294 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:02:24,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:02:24,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:02:24,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:02:24,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:02:24,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:02:24,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:02:24,295 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:02:24,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:02:24,296 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:02:24,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:02:24,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:02:24,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:02:24,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:02:24,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:02:24,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:02:24,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:02:24,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:02:24,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:02:24,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:02:24,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:02:24,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:02:24,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:02:24,326 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:02:24,341 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:02:24,344 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:02:24,347 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:02:24,348 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:02:24,349 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2019-09-03 20:02:24,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac06b8687/78c07bd5bd2f4495b3f9641f7d768855/FLAG759954d39 [2019-09-03 20:02:24,858 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:02:24,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2019-09-03 20:02:24,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac06b8687/78c07bd5bd2f4495b3f9641f7d768855/FLAG759954d39 [2019-09-03 20:02:25,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac06b8687/78c07bd5bd2f4495b3f9641f7d768855 [2019-09-03 20:02:25,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:02:25,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:02:25,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:02:25,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:02:25,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:02:25,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:02:25" (1/1) ... [2019-09-03 20:02:25,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c9c9c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:25, skipping insertion in model container [2019-09-03 20:02:25,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:02:25" (1/1) ... [2019-09-03 20:02:25,287 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:02:25,304 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:02:25,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:02:25,525 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:02:25,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:02:25,566 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:02:25,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:25 WrapperNode [2019-09-03 20:02:25,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:02:25,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:02:25,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:02:25,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:02:25,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:25" (1/1) ... [2019-09-03 20:02:25,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:25" (1/1) ... [2019-09-03 20:02:25,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:25" (1/1) ... [2019-09-03 20:02:25,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:25" (1/1) ... [2019-09-03 20:02:25,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:25" (1/1) ... [2019-09-03 20:02:25,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:25" (1/1) ... [2019-09-03 20:02:25,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:25" (1/1) ... [2019-09-03 20:02:25,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:02:25,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:02:25,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:02:25,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:02:25,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:25" (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 [2019-09-03 20:02:25,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:02:25,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:02:25,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:02:25,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:02:25,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:02:25,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:02:25,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:02:25,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:02:25,747 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:02:25,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:02:25,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:02:25,952 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:02:25,952 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:02:25,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:02:25 BoogieIcfgContainer [2019-09-03 20:02:25,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:02:25,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:02:25,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:02:25,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:02:25,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:02:25" (1/3) ... [2019-09-03 20:02:25,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24366ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:02:25, skipping insertion in model container [2019-09-03 20:02:25,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:25" (2/3) ... [2019-09-03 20:02:25,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24366ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:02:25, skipping insertion in model container [2019-09-03 20:02:25,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:02:25" (3/3) ... [2019-09-03 20:02:25,976 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2019-09-03 20:02:25,991 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:02:26,000 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:02:26,020 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:02:26,058 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:02:26,059 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:02:26,059 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:02:26,059 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:02:26,060 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:02:26,060 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:02:26,060 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:02:26,060 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:02:26,060 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:02:26,106 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-03 20:02:26,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 20:02:26,112 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:26,113 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:26,115 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:26,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1995182865, now seen corresponding path program 1 times [2019-09-03 20:02:26,120 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:26,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:26,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:26,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:26,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:26,237 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:02:26,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:02:26,241 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:02:26,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:02:26,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:02:26,254 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-03 20:02:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:26,273 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-09-03 20:02:26,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:02:26,274 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-09-03 20:02:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:26,283 INFO L225 Difference]: With dead ends: 33 [2019-09-03 20:02:26,283 INFO L226 Difference]: Without dead ends: 14 [2019-09-03 20:02:26,286 INFO L628 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 [2019-09-03 20:02:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-03 20:02:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-03 20:02:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-03 20:02:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-03 20:02:26,322 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-09-03 20:02:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:26,323 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-03 20:02:26,323 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:02:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-03 20:02:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 20:02:26,324 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:26,325 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:26,326 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2005341596, now seen corresponding path program 1 times [2019-09-03 20:02:26,328 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:26,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:26,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:26,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:26,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:26,583 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:02:26,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-03 20:02:26,585 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:02:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:02:26,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:02:26,587 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-09-03 20:02:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:26,727 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-09-03 20:02:26,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:02:26,728 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-09-03 20:02:26,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:26,731 INFO L225 Difference]: With dead ends: 26 [2019-09-03 20:02:26,731 INFO L226 Difference]: Without dead ends: 21 [2019-09-03 20:02:26,733 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:02:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-03 20:02:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2019-09-03 20:02:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-03 20:02:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-03 20:02:26,740 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2019-09-03 20:02:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:26,740 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-03 20:02:26,740 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:02:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-03 20:02:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-03 20:02:26,741 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:26,742 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:26,742 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:26,742 INFO L82 PathProgramCache]: Analyzing trace with hash -763628086, now seen corresponding path program 1 times [2019-09-03 20:02:26,743 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:26,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:26,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:26,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:26,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:26,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:02:26,847 INFO L223 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) [2019-09-03 20:02:26,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:02:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:26,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-03 20:02:26,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:27,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:02:27,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2019-09-03 20:02:27,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:02:27,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:02:27,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:02:27,005 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2019-09-03 20:02:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:27,082 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2019-09-03 20:02:27,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:02:27,083 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-09-03 20:02:27,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:27,084 INFO L225 Difference]: With dead ends: 31 [2019-09-03 20:02:27,084 INFO L226 Difference]: Without dead ends: 23 [2019-09-03 20:02:27,085 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:02:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-03 20:02:27,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2019-09-03 20:02:27,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-03 20:02:27,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-03 20:02:27,091 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-09-03 20:02:27,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:27,091 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-03 20:02:27,091 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:02:27,091 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-03 20:02:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 20:02:27,092 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:27,093 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:27,093 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:27,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:27,093 INFO L82 PathProgramCache]: Analyzing trace with hash 345235238, now seen corresponding path program 1 times [2019-09-03 20:02:27,094 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:27,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:27,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:27,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:27,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:27,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:02:27,405 INFO L223 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:02:27,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:27,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-03 20:02:27,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:27,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:27,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:02:27,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-09-03 20:02:27,678 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:02:27,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:02:27,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:02:27,679 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 19 states. [2019-09-03 20:02:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:27,907 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-09-03 20:02:27,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:02:27,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 17 [2019-09-03 20:02:27,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:27,910 INFO L225 Difference]: With dead ends: 44 [2019-09-03 20:02:27,910 INFO L226 Difference]: Without dead ends: 30 [2019-09-03 20:02:27,911 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:02:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-03 20:02:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-09-03 20:02:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-03 20:02:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-09-03 20:02:27,924 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 17 [2019-09-03 20:02:27,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:27,924 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-09-03 20:02:27,924 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:02:27,925 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-09-03 20:02:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-03 20:02:27,925 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:27,925 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:27,926 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:27,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:27,926 INFO L82 PathProgramCache]: Analyzing trace with hash 423463818, now seen corresponding path program 2 times [2019-09-03 20:02:27,926 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:27,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:27,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:27,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:27,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:28,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:02:28,114 INFO L223 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) [2019-09-03 20:02:28,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:02:28,159 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:02:28,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:28,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 20:02:28,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:28,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:02:28,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2019-09-03 20:02:28,383 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:02:28,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:02:28,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:02:28,384 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 20 states. [2019-09-03 20:02:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:29,085 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2019-09-03 20:02:29,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 20:02:29,086 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2019-09-03 20:02:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:29,087 INFO L225 Difference]: With dead ends: 60 [2019-09-03 20:02:29,087 INFO L226 Difference]: Without dead ends: 47 [2019-09-03 20:02:29,089 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:02:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-03 20:02:29,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2019-09-03 20:02:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-03 20:02:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2019-09-03 20:02:29,103 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 26 [2019-09-03 20:02:29,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:29,103 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2019-09-03 20:02:29,103 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:02:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2019-09-03 20:02:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-03 20:02:29,104 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:29,104 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:29,105 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:29,105 INFO L82 PathProgramCache]: Analyzing trace with hash 45653034, now seen corresponding path program 3 times [2019-09-03 20:02:29,105 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:29,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:29,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:29,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:29,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-03 20:02:29,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:02:29,414 INFO L223 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) [2019-09-03 20:02:29,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:02:29,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-03 20:02:29,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:29,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-03 20:02:29,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:29,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:29,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:02:29,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 28 [2019-09-03 20:02:29,880 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 20:02:29,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 20:02:29,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:02:29,881 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 28 states. [2019-09-03 20:02:30,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:30,399 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2019-09-03 20:02:30,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:02:30,399 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 29 [2019-09-03 20:02:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:30,400 INFO L225 Difference]: With dead ends: 58 [2019-09-03 20:02:30,400 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 20:02:30,402 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:02:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 20:02:30,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 20:02:30,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 20:02:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 20:02:30,403 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2019-09-03 20:02:30,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:30,403 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 20:02:30,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 20:02:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 20:02:30,403 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 20:02:30,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-03 20:02:30,735 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 21 [2019-09-03 20:02:30,739 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-03 20:02:30,740 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-03 20:02:30,740 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-03 20:02:30,740 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-03 20:02:30,740 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-03 20:02:30,741 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-03 20:02:30,741 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 22) the Hoare annotation is: true [2019-09-03 20:02:30,741 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2019-09-03 20:02:30,741 INFO L443 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2019-09-03 20:02:30,741 INFO L443 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2019-09-03 20:02:30,741 INFO L443 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2019-09-03 20:02:30,741 INFO L443 ceAbstractionStarter]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2019-09-03 20:02:30,742 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2019-09-03 20:02:30,742 INFO L439 ceAbstractionStarter]: At program point L15-3(lines 15 19) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0))) (or (and (= main_~n~0 0) (= main_~i~0 0)) (let ((.cse0 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse0 (* 2 main_~k~0)))) (and (<= main_~i~0 .cse1) (<= .cse1 main_~i~0) (<= main_~n~0 main_~k~0)))) [2019-09-03 20:02:30,742 INFO L439 ceAbstractionStarter]: At program point L15-4(lines 15 19) the Hoare annotation is: (and (or (<= main_~n~0 0) (< main_~n~0 (+ main_~k~0 1))) (<= main_~k~0 main_~n~0)) [2019-09-03 20:02:30,742 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-09-03 20:02:30,742 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-09-03 20:02:30,743 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-09-03 20:02:30,743 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-09-03 20:02:30,743 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-09-03 20:02:30,743 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-09-03 20:02:30,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:02:30 BoogieIcfgContainer [2019-09-03 20:02:30,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:02:30,758 INFO L168 Benchmark]: Toolchain (without parser) took 5488.49 ms. Allocated memory was 133.2 MB in the beginning and 260.6 MB in the end (delta: 127.4 MB). Free memory was 89.7 MB in the beginning and 87.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 130.0 MB. Max. memory is 7.1 GB. [2019-09-03 20:02:30,759 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 133.2 MB. Free memory was 107.5 MB in the beginning and 107.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:02:30,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.76 ms. Allocated memory is still 133.2 MB. Free memory was 89.5 MB in the beginning and 80.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-09-03 20:02:30,761 INFO L168 Benchmark]: Boogie Preprocessor took 121.98 ms. Allocated memory was 133.2 MB in the beginning and 199.2 MB in the end (delta: 66.1 MB). Free memory was 80.2 MB in the beginning and 175.8 MB in the end (delta: -95.6 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2019-09-03 20:02:30,762 INFO L168 Benchmark]: RCFGBuilder took 268.36 ms. Allocated memory is still 199.2 MB. Free memory was 175.8 MB in the beginning and 164.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-03 20:02:30,763 INFO L168 Benchmark]: TraceAbstraction took 4793.33 ms. Allocated memory was 199.2 MB in the beginning and 260.6 MB in the end (delta: 61.3 MB). Free memory was 163.4 MB in the beginning and 87.1 MB in the end (delta: 76.3 MB). Peak memory consumption was 137.6 MB. Max. memory is 7.1 GB. [2019-09-03 20:02:30,767 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 133.2 MB. Free memory was 107.5 MB in the beginning and 107.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.76 ms. Allocated memory is still 133.2 MB. Free memory was 89.5 MB in the beginning and 80.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.98 ms. Allocated memory was 133.2 MB in the beginning and 199.2 MB in the end (delta: 66.1 MB). Free memory was 80.2 MB in the beginning and 175.8 MB in the end (delta: -95.6 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 268.36 ms. Allocated memory is still 199.2 MB. Free memory was 175.8 MB in the beginning and 164.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4793.33 ms. Allocated memory was 199.2 MB in the beginning and 260.6 MB in the end (delta: 61.3 MB). Free memory was 163.4 MB in the beginning and 87.1 MB in the end (delta: 76.3 MB). Peak memory consumption was 137.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 15]: Loop Invariant Derived loop invariant: ((n == 0 && i == 0) || ((i + 1 <= 2 * n && 2 * n <= i + 1) && i + 1 <= 2 * k)) || ((i <= 2 * n && 2 * n <= i) && n <= k) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 4.6s OverallTime, 6 OverallIterations, 6 TraceHistogramMax, 1.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 69 SDtfs, 114 SDslu, 291 SDs, 0 SdLazy, 824 SolverSat, 91 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 16 PreInvPairs, 30 NumberOfFragments, 62 HoareAnnotationTreeSize, 16 FomulaSimplifications, 157 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 650 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 32083 SizeOfPredicates, 12 NumberOfNonLiveVariables, 208 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 10/184 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...