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/concurrent/CPS1-1617-Sheet03-Exercise03.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 09:52:12,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 09:52:12,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 09:52:12,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 09:52:12,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 09:52:12,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 09:52:12,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 09:52:12,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 09:52:12,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 09:52:12,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 09:52:12,118 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 09:52:12,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 09:52:12,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 09:52:12,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 09:52:12,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 09:52:12,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 09:52:12,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 09:52:12,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 09:52:12,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 09:52:12,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 09:52:12,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 09:52:12,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 09:52:12,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 09:52:12,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 09:52:12,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 09:52:12,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 09:52:12,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 09:52:12,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 09:52:12,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 09:52:12,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 09:52:12,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 09:52:12,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 09:52:12,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 09:52:12,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 09:52:12,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 09:52:12,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 09:52:12,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 09:52:12,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 09:52:12,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 09:52:12,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 09:52:12,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 09:52:12,194 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 09:52:12,208 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 09:52:12,212 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 09:52:12,214 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 09:52:12,214 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 09:52:12,215 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/CPS1-1617-Sheet03-Exercise03.bpl [2019-08-05 09:52:12,216 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/CPS1-1617-Sheet03-Exercise03.bpl' [2019-08-05 09:52:12,253 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 09:52:12,255 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 09:52:12,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 09:52:12,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 09:52:12,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 09:52:12,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:12" (1/1) ... [2019-08-05 09:52:12,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:12" (1/1) ... [2019-08-05 09:52:12,294 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 09:52:12,295 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 09:52:12,295 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 09:52:12,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 09:52:12,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 09:52:12,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 09:52:12,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 09:52:12,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:12" (1/1) ... [2019-08-05 09:52:12,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:12" (1/1) ... [2019-08-05 09:52:12,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:12" (1/1) ... [2019-08-05 09:52:12,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:12" (1/1) ... [2019-08-05 09:52:12,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:12" (1/1) ... [2019-08-05 09:52:12,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:12" (1/1) ... [2019-08-05 09:52:12,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:12" (1/1) ... [2019-08-05 09:52:12,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 09:52:12,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 09:52:12,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 09:52:12,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 09:52:12,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:12" (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 09:52:12,403 INFO L130 BoogieDeclarations]: Found specification of procedure Thread2 [2019-08-05 09:52:12,403 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread2 [2019-08-05 09:52:12,403 INFO L130 BoogieDeclarations]: Found specification of procedure Thread1 [2019-08-05 09:52:12,404 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread1 [2019-08-05 09:52:12,404 INFO L130 BoogieDeclarations]: Found specification of procedure ~init [2019-08-05 09:52:12,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ~init [2019-08-05 09:52:12,404 INFO L130 BoogieDeclarations]: Found specification of procedure Thread0 [2019-08-05 09:52:12,404 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread0 [2019-08-05 09:52:12,808 INFO L275 CfgBuilder]: Using library mode [2019-08-05 09:52:12,808 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 09:52:12,810 INFO L202 PluginConnector]: Adding new model CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 09:52:12 BoogieIcfgContainer [2019-08-05 09:52:12,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 09:52:12,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 09:52:12,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 09:52:12,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 09:52:12,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:12" (1/2) ... [2019-08-05 09:52:12,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7885b0a6 and model type CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 09:52:12, skipping insertion in model container [2019-08-05 09:52:12,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 09:52:12" (2/2) ... [2019-08-05 09:52:12,823 INFO L109 eAbstractionObserver]: Analyzing ICFG CPS1-1617-Sheet03-Exercise03.bpl [2019-08-05 09:52:12,836 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 09:52:12,844 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 09:52:12,856 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 09:52:12,880 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 09:52:12,881 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 09:52:12,881 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 09:52:12,881 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 09:52:12,881 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 09:52:12,882 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 09:52:12,882 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 09:52:12,882 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 09:52:12,882 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 09:52:12,896 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-08-05 09:52:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 09:52:12,904 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 09:52:12,905 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 09:52:12,908 INFO L418 AbstractCegarLoop]: === Iteration 1 === [Thread0Err0ASSERT_VIOLATIONASSERT]=== [2019-08-05 09:52:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 09:52:12,913 INFO L82 PathProgramCache]: Analyzing trace with hash 47858, now seen corresponding path program 1 times [2019-08-05 09:52:12,961 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 09:52:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 09:52:12,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-08-05 09:52:12,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 09:52:13,032 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 09:52:13,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 09:52:13,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 09:52:13,039 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 09:52:13,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 09:52:13,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 09:52:13,053 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2019-08-05 09:52:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 09:52:13,096 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2019-08-05 09:52:13,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 09:52:13,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-05 09:52:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 09:52:13,109 INFO L225 Difference]: With dead ends: 14 [2019-08-05 09:52:13,109 INFO L226 Difference]: Without dead ends: 5 [2019-08-05 09:52:13,111 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 09:52:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-08-05 09:52:13,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-08-05 09:52:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-05 09:52:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-08-05 09:52:13,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-08-05 09:52:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 09:52:13,143 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-08-05 09:52:13,143 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 09:52:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-08-05 09:52:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 09:52:13,144 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 09:52:13,144 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 09:52:13,145 INFO L418 AbstractCegarLoop]: === Iteration 2 === [Thread0Err0ASSERT_VIOLATIONASSERT]=== [2019-08-05 09:52:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 09:52:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1481670, now seen corresponding path program 1 times [2019-08-05 09:52:13,146 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 09:52:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 09:52:13,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 09:52:13,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 09:52:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 09:52:13,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 09:52:13,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 09:52:13,237 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 09:52:13,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 09:52:13,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 09:52:13,238 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2019-08-05 09:52:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 09:52:13,267 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 09:52:13,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 09:52:13,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 09:52:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 09:52:13,269 INFO L225 Difference]: With dead ends: 6 [2019-08-05 09:52:13,270 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 09:52:13,271 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 09:52:13,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 09:52:13,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-05 09:52:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-05 09:52:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-08-05 09:52:13,273 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-08-05 09:52:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 09:52:13,274 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-08-05 09:52:13,274 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 09:52:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-08-05 09:52:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 09:52:13,275 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 09:52:13,275 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-08-05 09:52:13,275 INFO L418 AbstractCegarLoop]: === Iteration 3 === [Thread0Err0ASSERT_VIOLATIONASSERT]=== [2019-08-05 09:52:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 09:52:13,276 INFO L82 PathProgramCache]: Analyzing trace with hash 45929842, now seen corresponding path program 2 times [2019-08-05 09:52:13,277 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 09:52:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 09:52:13,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 09:52:13,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 09:52:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 09:52:13,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 09:52:13,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-05 09:52:13,366 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 09:52:13,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 09:52:13,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-05 09:52:13,367 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2019-08-05 09:52:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 09:52:13,404 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-08-05 09:52:13,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 09:52:13,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-08-05 09:52:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 09:52:13,405 INFO L225 Difference]: With dead ends: 7 [2019-08-05 09:52:13,406 INFO L226 Difference]: Without dead ends: 7 [2019-08-05 09:52:13,406 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-05 09:52:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-08-05 09:52:13,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-08-05 09:52:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-05 09:52:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-05 09:52:13,408 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-08-05 09:52:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 09:52:13,409 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-05 09:52:13,409 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 09:52:13,409 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-05 09:52:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 09:52:13,410 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 09:52:13,410 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-08-05 09:52:13,410 INFO L418 AbstractCegarLoop]: === Iteration 4 === [Thread0Err0ASSERT_VIOLATIONASSERT]=== [2019-08-05 09:52:13,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 09:52:13,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1423823174, now seen corresponding path program 3 times [2019-08-05 09:52:13,412 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 09:52:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-08-05 09:52:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-08-05 09:52:13,464 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-08-05 09:52:13,491 INFO L202 PluginConnector]: Adding new model CPS1-1617-Sheet03-Exercise03.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 09:52:13 BoogieIcfgContainer [2019-08-05 09:52:13,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 09:52:13,496 INFO L168 Benchmark]: Toolchain (without parser) took 1238.94 ms. Allocated memory is still 137.9 MB. Free memory was 108.6 MB in the beginning and 61.7 MB in the end (delta: 46.9 MB). Peak memory consumption was 46.9 MB. Max. memory is 7.1 GB. [2019-08-05 09:52:13,497 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 109.8 MB in the beginning and 109.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-08-05 09:52:13,499 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.10 ms. Allocated memory is still 137.9 MB. Free memory was 108.6 MB in the beginning and 106.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-08-05 09:52:13,500 INFO L168 Benchmark]: Boogie Preprocessor took 32.88 ms. Allocated memory is still 137.9 MB. Free memory was 106.5 MB in the beginning and 105.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-05 09:52:13,502 INFO L168 Benchmark]: RCFGBuilder took 479.12 ms. Allocated memory is still 137.9 MB. Free memory was 105.4 MB in the beginning and 93.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2019-08-05 09:52:13,502 INFO L168 Benchmark]: TraceAbstraction took 680.54 ms. Allocated memory is still 137.9 MB. Free memory was 93.1 MB in the beginning and 61.7 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 7.1 GB. [2019-08-05 09:52:13,510 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 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 109.8 MB in the beginning and 109.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.10 ms. Allocated memory is still 137.9 MB. Free memory was 108.6 MB in the beginning and 106.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.88 ms. Allocated memory is still 137.9 MB. Free memory was 106.5 MB in the beginning and 105.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 479.12 ms. Allocated memory is still 137.9 MB. Free memory was 105.4 MB in the beginning and 93.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 680.54 ms. Allocated memory is still 137.9 MB. Free memory was 93.1 MB in the beginning and 61.7 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: assertion can be violated assertion can be violated We found a FailurePath: [L31] i := 1; VAL [i=1] [L32] COND TRUE i <= 3 [L33] x_local := x; [L34] x_local := x_local + 1; [L35] x := x_local; [L36] i := i + 1; VAL [i=2, x=-1, x_local=-1] [L32] COND TRUE i <= 3 [L33] x_local := x; [L34] x_local := x_local + 1; [L35] x := x_local; [L36] i := i + 1; VAL [i=3, x=0, x_local=0] [L32] COND TRUE i <= 3 [L33] x_local := x; [L34] x_local := x_local + 1; [L35] x := x_local; [L36] i := i + 1; VAL [i=4, x=1, x_local=1] [L32] COND FALSE !(i <= 3) [L38] finished_processes := finished_processes + 1; VAL [finished_processes=3, i=4, x=1, x_local=1] [L39] assert finished_processes == 3 ==> x != 1; VAL [finished_processes=3, i=4, x=1, x_local=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 13 locations, 1 error locations. UNSAFE Result, 0.6s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 12 SDs, 0 SdLazy, 13 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, 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, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 69 SizeOfPredicates, 2 NumberOfNonLiveVariables, 54 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...