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/loopAcceleration/loopAccelerationWerner/twoLoopsSameVars.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:18:24,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:18:24,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:18:24,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:18:24,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:18:24,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:18:24,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:18:24,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:18:24,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:18:24,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:18:24,797 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:18:24,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:18:24,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:18:24,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:18:24,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:18:24,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:18:24,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:18:24,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:18:24,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:18:24,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:18:24,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:18:24,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:18:24,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:18:24,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:18:24,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 11:18:24,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 11:18:24,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 11:18:24,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 11:18:24,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 11:18:24,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 11:18:24,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 11:18:24,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 11:18:24,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 11:18:24,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 11:18:24,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 11:18:24,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 11:18:24,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 11:18:24,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 11:18:24,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:18:24,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:18:24,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:18:24,892 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:18:24,908 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:18:24,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:18:24,914 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:18:24,916 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:18:24,917 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/loopAcceleration/loopAccelerationWerner/twoLoopsSameVars.bpl [2019-08-05 11:18:24,918 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/loopAcceleration/loopAccelerationWerner/twoLoopsSameVars.bpl' [2019-08-05 11:18:24,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:18:24,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:18:24,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:18:24,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:18:24,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:18:24,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:18:24" (1/1) ... [2019-08-05 11:18:24,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:18:24" (1/1) ... [2019-08-05 11:18:24,990 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 11:18:24,991 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 11:18:24,991 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 11:18:24,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:18:24,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:18:24,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:18:24,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:18:25,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:18:24" (1/1) ... [2019-08-05 11:18:25,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:18:24" (1/1) ... [2019-08-05 11:18:25,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:18:24" (1/1) ... [2019-08-05 11:18:25,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:18:24" (1/1) ... [2019-08-05 11:18:25,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:18:24" (1/1) ... [2019-08-05 11:18:25,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:18:24" (1/1) ... [2019-08-05 11:18:25,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:18:24" (1/1) ... [2019-08-05 11:18:25,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:18:25,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:18:25,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:18:25,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:18:25,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:18:24" (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 11:18:25,087 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2019-08-05 11:18:25,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-05 11:18:25,088 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-05 11:18:25,289 INFO L275 CfgBuilder]: Using library mode [2019-08-05 11:18:25,289 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 11:18:25,290 INFO L202 PluginConnector]: Adding new model twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:18:25 BoogieIcfgContainer [2019-08-05 11:18:25,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:18:25,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:18:25,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:18:25,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:18:25,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:18:24" (1/2) ... [2019-08-05 11:18:25,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6f008 and model type twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:18:25, skipping insertion in model container [2019-08-05 11:18:25,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:18:25" (2/2) ... [2019-08-05 11:18:25,298 INFO L109 eAbstractionObserver]: Analyzing ICFG twoLoopsSameVars.bpl [2019-08-05 11:18:25,308 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:18:25,315 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-08-05 11:18:25,331 INFO L252 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-08-05 11:18:25,355 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:18:25,356 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:18:25,356 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:18:25,356 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:18:25,356 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:18:25,356 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:18:25,357 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:18:25,357 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:18:25,357 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:18:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-08-05 11:18:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 11:18:25,378 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:18:25,379 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 11:18:25,381 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT, mainErr1ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:18:25,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:18:25,387 INFO L82 PathProgramCache]: Analyzing trace with hash 29984, now seen corresponding path program 1 times [2019-08-05 11:18:25,435 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:18:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:18:25,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-08-05 11:18:25,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:18:25,507 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 11:18:25,510 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:18:25,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 11:18:25,515 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:18:25,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:18:25,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:18:25,528 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-08-05 11:18:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:18:25,607 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-08-05 11:18:25,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:18:25,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-05 11:18:25,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:18:25,620 INFO L225 Difference]: With dead ends: 9 [2019-08-05 11:18:25,620 INFO L226 Difference]: Without dead ends: 8 [2019-08-05 11:18:25,622 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 11:18:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-05 11:18:25,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-08-05 11:18:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-08-05 11:18:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-08-05 11:18:25,655 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 3 [2019-08-05 11:18:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:18:25,655 INFO L475 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-08-05 11:18:25,655 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:18:25,656 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-08-05 11:18:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 11:18:25,656 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:18:25,656 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 11:18:25,657 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT, mainErr1ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:18:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:18:25,657 INFO L82 PathProgramCache]: Analyzing trace with hash 927558, now seen corresponding path program 1 times [2019-08-05 11:18:25,659 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:18:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:18:25,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:18:25,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:18:25,805 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 11:18:25,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:18:25,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 11:18:25,807 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:18:25,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:18:25,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:18:25,808 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-08-05 11:18:25,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:18:25,965 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-08-05 11:18:25,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:18:25,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 11:18:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:18:25,967 INFO L225 Difference]: With dead ends: 9 [2019-08-05 11:18:25,967 INFO L226 Difference]: Without dead ends: 9 [2019-08-05 11:18:25,968 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:18:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-08-05 11:18:25,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-08-05 11:18:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 11:18:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-08-05 11:18:25,970 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2019-08-05 11:18:25,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:18:25,970 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-08-05 11:18:25,971 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:18:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-08-05 11:18:25,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 11:18:25,971 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:18:25,972 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-08-05 11:18:25,972 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT, mainErr1ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:18:25,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:18:25,972 INFO L82 PathProgramCache]: Analyzing trace with hash 28752352, now seen corresponding path program 2 times [2019-08-05 11:18:25,973 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:18:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:18:25,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 11:18:25,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:18:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-08-05 11:18:26,045 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:18:26,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 11:18:26,045 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:18:26,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:18:26,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:18:26,046 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-08-05 11:18:26,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:18:26,094 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-08-05 11:18:26,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:18:26,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-08-05 11:18:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:18:26,096 INFO L225 Difference]: With dead ends: 9 [2019-08-05 11:18:26,096 INFO L226 Difference]: Without dead ends: 9 [2019-08-05 11:18:26,096 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 11:18:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-08-05 11:18:26,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-08-05 11:18:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 11:18:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-08-05 11:18:26,099 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-08-05 11:18:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:18:26,099 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-08-05 11:18:26,100 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:18:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-08-05 11:18:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-08-05 11:18:26,100 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:18:26,100 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-08-05 11:18:26,101 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT, mainErr1ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:18:26,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:18:26,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1862868300, now seen corresponding path program 1 times [2019-08-05 11:18:26,102 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:18:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:18:26,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:18:26,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:18:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-08-05 11:18:26,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:18:26,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-05 11:18:26,146 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:18:26,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:18:26,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:18:26,147 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-08-05 11:18:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:18:26,201 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2019-08-05 11:18:26,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:18:26,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-08-05 11:18:26,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:18:26,204 INFO L225 Difference]: With dead ends: 10 [2019-08-05 11:18:26,204 INFO L226 Difference]: Without dead ends: 10 [2019-08-05 11:18:26,204 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 11:18:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-08-05 11:18:26,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-08-05 11:18:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-08-05 11:18:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-08-05 11:18:26,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2019-08-05 11:18:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:18:26,222 INFO L475 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-08-05 11:18:26,222 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:18:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-08-05 11:18:26,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-08-05 11:18:26,223 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:18:26,223 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2019-08-05 11:18:26,223 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT, mainErr1ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:18:26,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:18:26,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1914340514, now seen corresponding path program 2 times [2019-08-05 11:18:26,224 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:18:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:18:26,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 11:18:26,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:18:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-08-05 11:18:26,356 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:18:26,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 11:18:26,357 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:18:26,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:18:26,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:18:26,358 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2019-08-05 11:18:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:18:26,439 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-08-05 11:18:26,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:18:26,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-08-05 11:18:26,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:18:26,440 INFO L225 Difference]: With dead ends: 9 [2019-08-05 11:18:26,440 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 11:18:26,440 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:18:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 11:18:26,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 11:18:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 11:18:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 11:18:26,442 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2019-08-05 11:18:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:18:26,442 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 11:18:26,442 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:18:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 11:18:26,442 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 11:18:26,448 INFO L202 PluginConnector]: Adding new model twoLoopsSameVars.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:18:26 BoogieIcfgContainer [2019-08-05 11:18:26,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:18:26,451 INFO L168 Benchmark]: Toolchain (without parser) took 1497.40 ms. Allocated memory was 141.6 MB in the beginning and 175.6 MB in the end (delta: 34.1 MB). Free memory was 111.4 MB in the beginning and 140.7 MB in the end (delta: -29.4 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. [2019-08-05 11:18:26,452 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 141.6 MB. Free memory was 112.4 MB in the beginning and 112.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-08-05 11:18:26,453 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.90 ms. Allocated memory is still 141.6 MB. Free memory was 111.1 MB in the beginning and 109.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-08-05 11:18:26,454 INFO L168 Benchmark]: Boogie Preprocessor took 25.06 ms. Allocated memory is still 141.6 MB. Free memory was 109.2 MB in the beginning and 108.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:18:26,455 INFO L168 Benchmark]: RCFGBuilder took 271.26 ms. Allocated memory is still 141.6 MB. Free memory was 108.1 MB in the beginning and 98.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-08-05 11:18:26,456 INFO L168 Benchmark]: TraceAbstraction took 1156.71 ms. Allocated memory was 141.6 MB in the beginning and 175.6 MB in the end (delta: 34.1 MB). Free memory was 98.5 MB in the beginning and 140.7 MB in the end (delta: -42.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 11:18:26,460 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 0.25 ms. Allocated memory is still 141.6 MB. Free memory was 112.4 MB in the beginning and 112.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.90 ms. Allocated memory is still 141.6 MB. Free memory was 111.1 MB in the beginning and 109.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.06 ms. Allocated memory is still 141.6 MB. Free memory was 109.2 MB in the beginning and 108.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 271.26 ms. Allocated memory is still 141.6 MB. Free memory was 108.1 MB in the beginning and 98.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1156.71 ms. Allocated memory was 141.6 MB in the beginning and 175.6 MB in the end (delta: 34.1 MB). Free memory was 98.5 MB in the beginning and 140.7 MB in the end (delta: -42.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 2 error locations. SAFE Result, 1.0s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 22 SDtfs, 7 SDslu, 0 SDs, 0 SdLazy, 56 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=4, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 282 SizeOfPredicates, 3 NumberOfNonLiveVariables, 66 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 12/14 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...