java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/programs/abstractInterpretation/regression/open/int/loop-nested-assume-safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:09:35,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:09:35,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:09:35,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:09:35,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:09:35,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:09:35,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:09:35,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:09:35,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:09:35,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:09:35,982 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:09:35,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:09:35,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:09:35,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:09:35,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:09:35,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:09:35,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:09:35,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:09:35,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:09:36,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:09:36,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:09:36,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:09:36,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:09:36,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:09:36,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 11:09:36,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 11:09:36,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 11:09:36,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 11:09:36,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 11:09:36,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 11:09:36,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 11:09:36,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 11:09:36,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 11:09:36,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 11:09:36,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 11:09:36,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 11:09:36,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 11:09:36,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 11:09:36,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:09:36,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:09:36,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:09:36,063 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:09:36,078 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:09:36,082 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:09:36,084 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:09:36,084 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:09:36,085 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/abstractInterpretation/regression/open/int/loop-nested-assume-safe.bpl [2019-08-05 11:09:36,086 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/abstractInterpretation/regression/open/int/loop-nested-assume-safe.bpl' [2019-08-05 11:09:36,113 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:09:36,114 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:09:36,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:09:36,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:09:36,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:09:36,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:09:36" (1/1) ... [2019-08-05 11:09:36,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:09:36" (1/1) ... [2019-08-05 11:09:36,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:09:36,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:09:36,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:09:36,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:09:36,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:09:36" (1/1) ... [2019-08-05 11:09:36,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:09:36" (1/1) ... [2019-08-05 11:09:36,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:09:36" (1/1) ... [2019-08-05 11:09:36,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:09:36" (1/1) ... [2019-08-05 11:09:36,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:09:36" (1/1) ... [2019-08-05 11:09:36,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:09:36" (1/1) ... [2019-08-05 11:09:36,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:09:36" (1/1) ... [2019-08-05 11:09:36,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:09:36,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:09:36,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:09:36,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:09:36,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:09:36" (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:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-08-05 11:09:36,256 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2019-08-05 11:09:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-05 11:09:36,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-05 11:09:36,587 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-05 11:09:36,588 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-08-05 11:09:36,590 INFO L202 PluginConnector]: Adding new model loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:09:36 BoogieIcfgContainer [2019-08-05 11:09:36,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:09:36,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:09:36,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:09:36,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:09:36,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:09:36" (1/2) ... [2019-08-05 11:09:36,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c67171e and model type loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:09:36, skipping insertion in model container [2019-08-05 11:09:36,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:09:36" (2/2) ... [2019-08-05 11:09:36,601 INFO L109 eAbstractionObserver]: Analyzing ICFG loop-nested-assume-safe.bpl [2019-08-05 11:09:36,611 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:09:36,619 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 11:09:36,636 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 11:09:36,660 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:09:36,660 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:09:36,661 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:09:36,661 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:09:36,661 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:09:36,661 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:09:36,661 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:09:36,662 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:09:36,662 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:09:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2019-08-05 11:09:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 11:09:36,683 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:09:36,683 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 11:09:36,686 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:09:36,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:09:36,692 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2019-08-05 11:09:36,743 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:09:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:09:36,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:09:36,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:09:36,818 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 11:09:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:09:36,893 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:09:36,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 11:09:36,900 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:09:36,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:09:36,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:09:36,925 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 4 states. [2019-08-05 11:09:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:09:37,083 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-08-05 11:09:37,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 11:09:37,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-08-05 11:09:37,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:09:37,094 INFO L225 Difference]: With dead ends: 7 [2019-08-05 11:09:37,094 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 11:09:37,096 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:09:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 11:09:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-05 11:09:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-05 11:09:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-08-05 11:09:37,128 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2019-08-05 11:09:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:09:37,128 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-08-05 11:09:37,128 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:09:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-08-05 11:09:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 11:09:37,129 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:09:37,129 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-08-05 11:09:37,130 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:09:37,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:09:37,130 INFO L82 PathProgramCache]: Analyzing trace with hash 28884073, now seen corresponding path program 1 times [2019-08-05 11:09:37,131 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:09:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:09:37,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 11:09:37,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:09:37,188 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 11:09:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:09:37,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:09:37,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 11:09:37,210 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 11:09:37,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 11:09:37,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:09:37,211 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2019-08-05 11:09:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:09:37,300 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-05 11:09:37,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 11:09:37,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-08-05 11:09:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:09:37,302 INFO L225 Difference]: With dead ends: 8 [2019-08-05 11:09:37,302 INFO L226 Difference]: Without dead ends: 8 [2019-08-05 11:09:37,303 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-08-05 11:09:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-05 11:09:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-08-05 11:09:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-08-05 11:09:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-08-05 11:09:37,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2019-08-05 11:09:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:09:37,306 INFO L475 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-08-05 11:09:37,307 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 11:09:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-08-05 11:09:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-08-05 11:09:37,307 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:09:37,308 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2019-08-05 11:09:37,308 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:09:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:09:37,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1987798322, now seen corresponding path program 2 times [2019-08-05 11:09:37,310 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:09:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:09:37,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-05 11:09:37,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:09:37,497 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 11:09:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-08-05 11:09:37,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:09:37,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-05 11:09:37,542 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 11:09:37,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 11:09:37,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:09:37,543 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2019-08-05 11:09:37,767 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2019-08-05 11:09:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:09:37,805 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-08-05 11:09:37,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 11:09:37,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-08-05 11:09:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:09:37,806 INFO L225 Difference]: With dead ends: 7 [2019-08-05 11:09:37,806 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 11:09:37,807 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-08-05 11:09:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 11:09:37,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 11:09:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 11:09:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 11:09:37,809 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2019-08-05 11:09:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:09:37,809 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 11:09:37,809 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 11:09:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 11:09:37,809 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 11:09:37,817 INFO L202 PluginConnector]: Adding new model loop-nested-assume-safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:09:37 BoogieIcfgContainer [2019-08-05 11:09:37,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:09:37,820 INFO L168 Benchmark]: Toolchain (without parser) took 1704.70 ms. Allocated memory was 137.9 MB in the beginning and 172.5 MB in the end (delta: 34.6 MB). Free memory was 110.8 MB in the beginning and 140.5 MB in the end (delta: -29.7 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. [2019-08-05 11:09:37,821 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 112.0 MB in the beginning and 111.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-08-05 11:09:37,822 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.17 ms. Allocated memory is still 137.9 MB. Free memory was 110.8 MB in the beginning and 108.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:09:37,824 INFO L168 Benchmark]: Boogie Preprocessor took 21.09 ms. Allocated memory is still 137.9 MB. Free memory was 108.7 MB in the beginning and 107.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-08-05 11:09:37,825 INFO L168 Benchmark]: RCFGBuilder took 405.75 ms. Allocated memory is still 137.9 MB. Free memory was 107.4 MB in the beginning and 97.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-08-05 11:09:37,826 INFO L168 Benchmark]: TraceAbstraction took 1226.35 ms. Allocated memory was 137.9 MB in the beginning and 172.5 MB in the end (delta: 34.6 MB). Free memory was 97.5 MB in the beginning and 140.5 MB in the end (delta: -42.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 11:09:37,836 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 112.0 MB in the beginning and 111.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.17 ms. Allocated memory is still 137.9 MB. Free memory was 110.8 MB in the beginning and 108.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.09 ms. Allocated memory is still 137.9 MB. Free memory was 108.7 MB in the beginning and 107.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 405.75 ms. Allocated memory is still 137.9 MB. Free memory was 107.4 MB in the beginning and 97.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1226.35 ms. Allocated memory was 137.9 MB in the beginning and 172.5 MB in the end (delta: 34.6 MB). Free memory was 97.5 MB in the beginning and 140.5 MB in the end (delta: -42.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. SAFE Result, 1.1s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 7 SDtfs, 4 SDslu, 6 SDs, 0 SdLazy, 21 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=2, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 192 SizeOfPredicates, 4 NumberOfNonLiveVariables, 36 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 5/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...