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/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:57:32,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:57:32,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:57:32,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:57:32,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:57:32,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:57:32,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:57:32,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:57:32,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:57:32,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:57:32,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:57:32,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:57:32,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:57:32,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:57:32,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:57:32,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:57:32,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:57:32,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:57:32,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:57:32,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:57:32,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:57:32,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:57:32,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:57:32,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:57:32,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:57:32,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:57:32,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:57:32,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:57:32,425 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 [2019-09-20 12:57:32,465 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:57:32,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:57:32,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:57:32,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:57:32,466 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:57:32,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:57:32,467 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:57:32,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:57:32,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:57:32,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:57:32,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:57:32,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:57:32,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:57:32,473 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:57:32,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:57:32,473 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:57:32,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:57:32,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:57:32,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:57:32,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:57:32,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:57:32,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:57:32,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:57:32,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:57:32,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:57:32,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:57:32,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:57:32,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:57:32,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:57:32,528 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:57:32,545 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:57:32,549 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:57:32,550 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:57:32,551 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:57:32,552 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2019-09-20 12:57:32,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da1b7f115/c0693c5024c045b3a08e5ad524990316/FLAGc5e3e8f88 [2019-09-20 12:57:33,078 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:57:33,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2019-09-20 12:57:33,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da1b7f115/c0693c5024c045b3a08e5ad524990316/FLAGc5e3e8f88 [2019-09-20 12:57:33,471 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da1b7f115/c0693c5024c045b3a08e5ad524990316 [2019-09-20 12:57:33,480 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:57:33,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:57:33,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:33,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:57:33,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:57:33,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f55d4e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33, skipping insertion in model container [2019-09-20 12:57:33,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,500 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:57:33,520 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:57:33,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:33,766 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:57:33,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:33,936 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:57:33,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33 WrapperNode [2019-09-20 12:57:33,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:33,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:57:33,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:57:33,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:57:33,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:34,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:34,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:57:34,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:57:34,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:57:34,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:57:34,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (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 [2019-09-20 12:57:34,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:57:34,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:57:34,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:57:34,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:57:34,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:57:34,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 12:57:34,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:57:34,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-09-20 12:57:34,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:57:34,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 12:57:34,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 12:57:34,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 12:57:34,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 12:57:34,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:57:34,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:57:34,396 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:57:34,397 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-20 12:57:34,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:34 BoogieIcfgContainer [2019-09-20 12:57:34,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:57:34,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:57:34,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:57:34,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:57:34,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:57:33" (1/3) ... [2019-09-20 12:57:34,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b91a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:34, skipping insertion in model container [2019-09-20 12:57:34,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (2/3) ... [2019-09-20 12:57:34,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b91a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:34, skipping insertion in model container [2019-09-20 12:57:34,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:34" (3/3) ... [2019-09-20 12:57:34,406 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2019-09-20 12:57:34,416 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:57:34,427 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:57:34,443 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:57:34,471 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:57:34,471 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:57:34,471 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:57:34,472 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:57:34,472 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:57:34,472 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:57:34,472 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:57:34,472 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:57:34,472 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:57:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-09-20 12:57:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-20 12:57:34,499 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:34,500 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:34,502 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:34,508 INFO L82 PathProgramCache]: Analyzing trace with hash -99599224, now seen corresponding path program 1 times [2019-09-20 12:57:34,510 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:34,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:34,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:34,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:34,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:34,652 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:34,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:57:34,656 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:57:34,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:57:34,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:57:34,670 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2019-09-20 12:57:34,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:34,691 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2019-09-20 12:57:34,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:57:34,693 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2019-09-20 12:57:34,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:34,699 INFO L225 Difference]: With dead ends: 62 [2019-09-20 12:57:34,700 INFO L226 Difference]: Without dead ends: 28 [2019-09-20 12:57:34,703 INFO L636 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 [2019-09-20 12:57:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-20 12:57:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-20 12:57:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-20 12:57:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-09-20 12:57:34,740 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2019-09-20 12:57:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:34,740 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-09-20 12:57:34,741 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:57:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-09-20 12:57:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-20 12:57:34,742 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:34,742 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:34,742 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:34,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:34,743 INFO L82 PathProgramCache]: Analyzing trace with hash 930552028, now seen corresponding path program 1 times [2019-09-20 12:57:34,743 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:34,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:34,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:34,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:34,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:34,806 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:34,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:57:34,808 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:57:34,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:57:34,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:57:34,809 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-09-20 12:57:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:34,908 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2019-09-20 12:57:34,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:57:34,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-09-20 12:57:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:34,912 INFO L225 Difference]: With dead ends: 56 [2019-09-20 12:57:34,912 INFO L226 Difference]: Without dead ends: 36 [2019-09-20 12:57:34,913 INFO L636 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 [2019-09-20 12:57:34,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-20 12:57:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-09-20 12:57:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-20 12:57:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-09-20 12:57:34,922 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2019-09-20 12:57:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:34,923 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-09-20 12:57:34,923 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:57:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-09-20 12:57:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-20 12:57:34,924 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:34,924 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:34,925 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:34,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:34,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1358146588, now seen corresponding path program 1 times [2019-09-20 12:57:34,926 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:34,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:34,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:34,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:34,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 12:57:35,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:35,016 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 [2019-09-20 12:57:35,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:35,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:57:35,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Stream closed [2019-09-20 12:57:35,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:35,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-20 12:57:35,144 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:57:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:57:35,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:57:35,145 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-09-20 12:57:35,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:35,235 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2019-09-20 12:57:35,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 12:57:35,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-09-20 12:57:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:35,239 INFO L225 Difference]: With dead ends: 65 [2019-09-20 12:57:35,239 INFO L226 Difference]: Without dead ends: 44 [2019-09-20 12:57:35,242 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:57:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-20 12:57:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2019-09-20 12:57:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-20 12:57:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-09-20 12:57:35,258 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2019-09-20 12:57:35,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:35,258 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-09-20 12:57:35,262 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:57:35,262 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-09-20 12:57:35,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-20 12:57:35,264 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:35,264 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:35,264 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:35,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1752396196, now seen corresponding path program 2 times [2019-09-20 12:57:35,265 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:35,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:35,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:35,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:35,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 12:57:35,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:35,440 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) [2019-09-20 12:57:35,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:35,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-20 12:57:35,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:35,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-20 12:57:35,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:35,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-20 12:57:35,597 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:57:35,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2019-09-20 12:57:35,598 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-20 12:57:35,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-20 12:57:35,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:57:35,601 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 10 states. [2019-09-20 12:57:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:35,842 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2019-09-20 12:57:35,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-20 12:57:35,843 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2019-09-20 12:57:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:35,844 INFO L225 Difference]: With dead ends: 83 [2019-09-20 12:57:35,844 INFO L226 Difference]: Without dead ends: 54 [2019-09-20 12:57:35,845 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-09-20 12:57:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-20 12:57:35,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2019-09-20 12:57:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-20 12:57:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2019-09-20 12:57:35,854 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 32 [2019-09-20 12:57:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:35,855 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2019-09-20 12:57:35,855 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-20 12:57:35,855 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2019-09-20 12:57:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-20 12:57:35,856 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:35,856 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:35,856 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:35,857 INFO L82 PathProgramCache]: Analyzing trace with hash 515659703, now seen corresponding path program 1 times [2019-09-20 12:57:35,857 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:35,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:35,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:35,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:35,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-20 12:57:35,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:35,930 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 [2019-09-20 12:57:35,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:35,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-20 12:57:35,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-20 12:57:36,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:36,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-20 12:57:36,018 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:57:36,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:57:36,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:57:36,020 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2019-09-20 12:57:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:36,112 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2019-09-20 12:57:36,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:57:36,114 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2019-09-20 12:57:36,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:36,116 INFO L225 Difference]: With dead ends: 89 [2019-09-20 12:57:36,116 INFO L226 Difference]: Without dead ends: 62 [2019-09-20 12:57:36,117 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:57:36,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-20 12:57:36,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2019-09-20 12:57:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-20 12:57:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2019-09-20 12:57:36,130 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 38 [2019-09-20 12:57:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:36,131 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2019-09-20 12:57:36,131 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:57:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2019-09-20 12:57:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-20 12:57:36,133 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:36,134 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:36,134 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:36,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:36,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1489958921, now seen corresponding path program 2 times [2019-09-20 12:57:36,135 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:36,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:36,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:36,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:36,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-20 12:57:36,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:36,260 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:36,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:57:36,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-20 12:57:36,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:36,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-20 12:57:36,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:36,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-20 12:57:36,354 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:57:36,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2019-09-20 12:57:36,355 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-20 12:57:36,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-20 12:57:36,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:57:36,356 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 10 states. [2019-09-20 12:57:36,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:36,611 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2019-09-20 12:57:36,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-20 12:57:36,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2019-09-20 12:57:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:36,614 INFO L225 Difference]: With dead ends: 95 [2019-09-20 12:57:36,615 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 12:57:36,616 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-09-20 12:57:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 12:57:36,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 12:57:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 12:57:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 12:57:36,619 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2019-09-20 12:57:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:36,619 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 12:57:36,619 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-20 12:57:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 12:57:36,620 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 12:57:36,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-20 12:57:36,752 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-09-20 12:57:36,752 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-09-20 12:57:36,753 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-20 12:57:36,753 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-20 12:57:36,753 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-20 12:57:36,753 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-20 12:57:36,753 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-20 12:57:36,753 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 14 58) no Hoare annotation was computed. [2019-09-20 12:57:36,754 INFO L443 ceAbstractionStarter]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2019-09-20 12:57:36,754 INFO L439 ceAbstractionStarter]: At program point L23-3(lines 23 24) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2019-09-20 12:57:36,754 INFO L443 ceAbstractionStarter]: For program point L23-4(lines 23 24) no Hoare annotation was computed. [2019-09-20 12:57:36,754 INFO L443 ceAbstractionStarter]: For program point L19-2(lines 19 20) no Hoare annotation was computed. [2019-09-20 12:57:36,754 INFO L439 ceAbstractionStarter]: At program point L19-3(lines 19 20) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2019-09-20 12:57:36,755 INFO L443 ceAbstractionStarter]: For program point L19-4(lines 19 20) no Hoare annotation was computed. [2019-09-20 12:57:36,755 INFO L443 ceAbstractionStarter]: For program point L32-1(lines 32 33) no Hoare annotation was computed. [2019-09-20 12:57:36,755 INFO L439 ceAbstractionStarter]: At program point L32-3(lines 32 33) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2019-09-20 12:57:36,755 INFO L443 ceAbstractionStarter]: For program point L32-4(lines 15 58) no Hoare annotation was computed. [2019-09-20 12:57:36,756 INFO L443 ceAbstractionStarter]: For program point L28-1(lines 28 29) no Hoare annotation was computed. [2019-09-20 12:57:36,757 INFO L439 ceAbstractionStarter]: At program point L28-3(lines 28 29) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2019-09-20 12:57:36,757 INFO L443 ceAbstractionStarter]: For program point L28-4(lines 28 29) no Hoare annotation was computed. [2019-09-20 12:57:36,757 INFO L443 ceAbstractionStarter]: For program point L41(lines 41 50) no Hoare annotation was computed. [2019-09-20 12:57:36,757 INFO L439 ceAbstractionStarter]: At program point L41-2(lines 39 51) the Hoare annotation is: (or (= 0 main_~found~0) (and (<= 0 main_~j~0) (<= main_~nc_B~0 0) (= main_~i~0 0)) (= 1 main_~found~0)) [2019-09-20 12:57:36,757 INFO L443 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2019-09-20 12:57:36,758 INFO L443 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2019-09-20 12:57:36,758 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 14 58) no Hoare annotation was computed. [2019-09-20 12:57:36,758 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 14 58) the Hoare annotation is: true [2019-09-20 12:57:36,758 INFO L439 ceAbstractionStarter]: At program point L55(line 55) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2019-09-20 12:57:36,758 INFO L443 ceAbstractionStarter]: For program point L55-1(line 55) no Hoare annotation was computed. [2019-09-20 12:57:36,759 INFO L443 ceAbstractionStarter]: For program point L39-2(lines 39 51) no Hoare annotation was computed. [2019-09-20 12:57:36,759 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2019-09-20 12:57:36,759 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2019-09-20 12:57:36,759 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2019-09-20 12:57:36,759 INFO L443 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2019-09-20 12:57:36,760 INFO L443 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2019-09-20 12:57:36,760 INFO L443 ceAbstractionStarter]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2019-09-20 12:57:36,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 12:57:36 BoogieIcfgContainer [2019-09-20 12:57:36,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 12:57:36,797 INFO L168 Benchmark]: Toolchain (without parser) took 3308.08 ms. Allocated memory was 138.9 MB in the beginning and 220.2 MB in the end (delta: 81.3 MB). Free memory was 86.2 MB in the beginning and 72.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 95.5 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:36,799 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 138.9 MB. Free memory was 104.8 MB in the beginning and 104.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 12:57:36,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 453.54 ms. Allocated memory was 138.9 MB in the beginning and 197.7 MB in the end (delta: 58.7 MB). Free memory was 86.0 MB in the beginning and 175.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:36,803 INFO L168 Benchmark]: Boogie Preprocessor took 68.91 ms. Allocated memory is still 197.7 MB. Free memory was 175.1 MB in the beginning and 173.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:36,804 INFO L168 Benchmark]: RCFGBuilder took 391.25 ms. Allocated memory is still 197.7 MB. Free memory was 173.3 MB in the beginning and 154.6 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:36,810 INFO L168 Benchmark]: TraceAbstraction took 2388.69 ms. Allocated memory was 197.7 MB in the beginning and 220.2 MB in the end (delta: 22.5 MB). Free memory was 154.0 MB in the beginning and 72.0 MB in the end (delta: 82.0 MB). Peak memory consumption was 104.6 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:36,817 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 138.9 MB. Free memory was 104.8 MB in the beginning and 104.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 453.54 ms. Allocated memory was 138.9 MB in the beginning and 197.7 MB in the end (delta: 58.7 MB). Free memory was 86.0 MB in the beginning and 175.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.91 ms. Allocated memory is still 197.7 MB. Free memory was 175.1 MB in the beginning and 173.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 391.25 ms. Allocated memory is still 197.7 MB. Free memory was 173.3 MB in the beginning and 154.6 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2388.69 ms. Allocated memory was 197.7 MB in the beginning and 220.2 MB in the end (delta: 22.5 MB). Free memory was 154.0 MB in the beginning and 72.0 MB in the end (delta: 82.0 MB). Peak memory consumption was 104.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 39]: Loop Invariant Derived loop invariant: (0 == found || ((0 <= j && nc_B <= 0) && i == 0)) || 1 == found - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 1 error locations. SAFE Result, 2.2s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 160 SDtfs, 126 SDslu, 392 SDs, 0 SdLazy, 304 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 177 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 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, 48 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 23 PreInvPairs, 51 NumberOfFragments, 57 HoareAnnotationTreeSize, 23 FomulaSimplifications, 244 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 326 NumberOfCodeBlocks, 300 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 316 ConstructedInterpolants, 0 QuantifiedInterpolants, 14058 SizeOfPredicates, 10 NumberOfNonLiveVariables, 397 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 88/128 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...