java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-e6fd87c [2018-07-25 13:28:46,353 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-25 13:28:46,355 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-25 13:28:46,367 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-25 13:28:46,368 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-25 13:28:46,369 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-25 13:28:46,370 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-25 13:28:46,373 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-25 13:28:46,375 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-25 13:28:46,376 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-25 13:28:46,377 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-25 13:28:46,377 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-25 13:28:46,379 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-25 13:28:46,380 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-25 13:28:46,383 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-25 13:28:46,384 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-25 13:28:46,385 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-25 13:28:46,387 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-25 13:28:46,389 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-25 13:28:46,390 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-25 13:28:46,391 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-25 13:28:46,392 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-25 13:28:46,395 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-25 13:28:46,395 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-25 13:28:46,395 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-25 13:28:46,396 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-25 13:28:46,397 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-25 13:28:46,398 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-25 13:28:46,399 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-25 13:28:46,400 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-25 13:28:46,400 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-25 13:28:46,401 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-25 13:28:46,401 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-25 13:28:46,401 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-25 13:28:46,402 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-25 13:28:46,403 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-25 13:28:46,403 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf [2018-07-25 13:28:46,420 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-25 13:28:46,420 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-25 13:28:46,422 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-25 13:28:46,422 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-25 13:28:46,422 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-25 13:28:46,422 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-25 13:28:46,422 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-25 13:28:46,423 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-25 13:28:46,488 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-25 13:28:46,503 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-25 13:28:46,506 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-25 13:28:46,508 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-25 13:28:46,508 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-25 13:28:46,509 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl [2018-07-25 13:28:46,509 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl' [2018-07-25 13:28:46,575 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-25 13:28:46,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-07-25 13:28:46,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-25 13:28:46,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-25 13:28:46,578 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-25 13:28:46,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:28:46" (1/1) ... [2018-07-25 13:28:46,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:28:46" (1/1) ... [2018-07-25 13:28:46,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-25 13:28:46,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-25 13:28:46,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-25 13:28:46,625 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-25 13:28:46,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:28:46" (1/1) ... [2018-07-25 13:28:46,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:28:46" (1/1) ... [2018-07-25 13:28:46,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:28:46" (1/1) ... [2018-07-25 13:28:46,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:28:46" (1/1) ... [2018-07-25 13:28:46,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:28:46" (1/1) ... [2018-07-25 13:28:46,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:28:46" (1/1) ... [2018-07-25 13:28:46,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:28:46" (1/1) ... [2018-07-25 13:28:46,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-25 13:28:46,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-25 13:28:46,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-25 13:28:46,681 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-25 13:28:46,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:28:46" (1/1) ... [2018-07-25 13:28:46,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-25 13:28:46,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-25 13:28:47,650 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-25 13:28:47,650 INFO L202 PluginConnector]: Adding new model pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 01:28:47 BoogieIcfgContainer [2018-07-25 13:28:47,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-25 13:28:47,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-25 13:28:47,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-25 13:28:47,655 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-25 13:28:47,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 01:28:46" (1/2) ... [2018-07-25 13:28:47,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19179ea9 and model type pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.07 01:28:47, skipping insertion in model container [2018-07-25 13:28:47,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 01:28:47" (2/2) ... [2018-07-25 13:28:47,659 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl [2018-07-25 13:28:47,671 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-25 13:28:47,679 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-25 13:28:47,725 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-25 13:28:47,726 INFO L374 AbstractCegarLoop]: Interprodecural is true [2018-07-25 13:28:47,726 INFO L375 AbstractCegarLoop]: Hoare is true [2018-07-25 13:28:47,726 INFO L376 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-25 13:28:47,726 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-25 13:28:47,727 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-25 13:28:47,727 INFO L379 AbstractCegarLoop]: Difference is false [2018-07-25 13:28:47,727 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-25 13:28:47,727 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-25 13:28:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-25 13:28:47,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-25 13:28:47,754 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:28:47,755 INFO L354 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-25 13:28:47,756 INFO L415 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:28:47,762 INFO L82 PathProgramCache]: Analyzing trace with hash 998225, now seen corresponding path program 1 times [2018-07-25 13:28:47,771 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:28:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:28:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 13:28:47,971 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-25 13:28:47,971 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-25 13:28:47,976 INFO L451 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-25 13:28:47,991 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-25 13:28:47,991 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-25 13:28:47,994 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2018-07-25 13:28:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:28:48,099 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-07-25 13:28:48,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-25 13:28:48,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-07-25 13:28:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:28:48,112 INFO L225 Difference]: With dead ends: 11 [2018-07-25 13:28:48,113 INFO L226 Difference]: Without dead ends: 8 [2018-07-25 13:28:48,120 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-25 13:28:48,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-25 13:28:48,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-07-25 13:28:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-25 13:28:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-25 13:28:48,156 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-07-25 13:28:48,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:28:48,157 INFO L472 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-25 13:28:48,157 INFO L473 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-25 13:28:48,158 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-25 13:28:48,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-25 13:28:48,158 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:28:48,158 INFO L354 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-07-25 13:28:48,159 INFO L415 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:28:48,159 INFO L82 PathProgramCache]: Analyzing trace with hash 959374695, now seen corresponding path program 1 times [2018-07-25 13:28:48,160 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:28:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:28:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 13:28:48,227 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:28:48,227 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-25 13:28:48,230 INFO L451 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-25 13:28:48,230 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-25 13:28:48,230 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-25 13:28:48,231 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-07-25 13:28:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:28:48,293 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-07-25 13:28:48,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-25 13:28:48,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-07-25 13:28:48,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:28:48,294 INFO L225 Difference]: With dead ends: 12 [2018-07-25 13:28:48,295 INFO L226 Difference]: Without dead ends: 10 [2018-07-25 13:28:48,296 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-25 13:28:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-25 13:28:48,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-07-25 13:28:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-25 13:28:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-25 13:28:48,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-07-25 13:28:48,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:28:48,300 INFO L472 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-25 13:28:48,300 INFO L473 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-25 13:28:48,301 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-25 13:28:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-25 13:28:48,301 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:28:48,301 INFO L354 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-07-25 13:28:48,302 INFO L415 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:28:48,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1458806275, now seen corresponding path program 2 times [2018-07-25 13:28:48,302 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:28:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:28:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 13:28:48,419 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:28:48,419 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-25 13:28:48,421 INFO L451 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-25 13:28:48,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-25 13:28:48,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-25 13:28:48,423 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-07-25 13:28:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:28:48,504 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-25 13:28:48,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-25 13:28:48,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-07-25 13:28:48,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:28:48,505 INFO L225 Difference]: With dead ends: 14 [2018-07-25 13:28:48,505 INFO L226 Difference]: Without dead ends: 12 [2018-07-25 13:28:48,506 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-07-25 13:28:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-25 13:28:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-07-25 13:28:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-25 13:28:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-25 13:28:48,511 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-07-25 13:28:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:28:48,512 INFO L472 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-25 13:28:48,512 INFO L473 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-25 13:28:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-25 13:28:48,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-25 13:28:48,513 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 13:28:48,513 INFO L354 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-07-25 13:28:48,515 INFO L415 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 13:28:48,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1753411309, now seen corresponding path program 3 times [2018-07-25 13:28:48,515 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 13:28:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 13:28:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-25 13:28:48,603 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 13:28:48,604 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-25 13:28:48,604 INFO L451 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-25 13:28:48,604 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-25 13:28:48,605 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-25 13:28:48,605 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-07-25 13:28:48,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 13:28:48,623 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-25 13:28:48,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-25 13:28:48,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-07-25 13:28:48,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 13:28:48,625 INFO L225 Difference]: With dead ends: 11 [2018-07-25 13:28:48,625 INFO L226 Difference]: Without dead ends: 0 [2018-07-25 13:28:48,626 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-25 13:28:48,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-07-25 13:28:48,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-07-25 13:28:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-07-25 13:28:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-07-25 13:28:48,627 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2018-07-25 13:28:48,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 13:28:48,628 INFO L472 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-07-25 13:28:48,628 INFO L473 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-25 13:28:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-07-25 13:28:48,628 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-07-25 13:28:48,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-07-25 13:28:48,673 INFO L422 ceAbstractionStarter]: For program point L300(lines 300 311) no Hoare annotation was computed. [2018-07-25 13:28:48,674 INFO L425 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 66 376) the Hoare annotation is: true [2018-07-25 13:28:48,674 INFO L422 ceAbstractionStarter]: For program point L317(lines 310 318) no Hoare annotation was computed. [2018-07-25 13:28:48,674 INFO L422 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 66 376) no Hoare annotation was computed. [2018-07-25 13:28:48,674 INFO L422 ceAbstractionStarter]: For program point L251(lines 243 252) no Hoare annotation was computed. [2018-07-25 13:28:48,675 INFO L418 ceAbstractionStarter]: At program point L367(lines 367 374) the Hoare annotation is: false [2018-07-25 13:28:48,675 INFO L418 ceAbstractionStarter]: At program point ULTIMATE.startEXIT(lines 66 376) the Hoare annotation is: false [2018-07-25 13:28:48,675 INFO L422 ceAbstractionStarter]: For program point L256(lines 256 266) no Hoare annotation was computed. [2018-07-25 13:28:48,675 INFO L422 ceAbstractionStarter]: For program point L351(lines 346 352) no Hoare annotation was computed. [2018-07-25 13:28:48,675 INFO L422 ceAbstractionStarter]: For program point L273(lines 265 274) no Hoare annotation was computed. [2018-07-25 13:28:48,675 INFO L422 ceAbstractionStarter]: For program point L331(lines 331 337) no Hoare annotation was computed. [2018-07-25 13:28:48,676 INFO L418 ceAbstractionStarter]: At program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 375) the Hoare annotation is: false [2018-07-25 13:28:48,676 INFO L422 ceAbstractionStarter]: For program point L278(lines 278 288) no Hoare annotation was computed. [2018-07-25 13:28:48,678 INFO L418 ceAbstractionStarter]: At program point L373(lines 226 373) the Hoare annotation is: (let ((.cse0 (<= ~r1 0)) (.cse1 (<= 0 ~r1))) (or (and (not (= ~p1_old ~nomsg)) (<= ULTIMATE.start_assert_~arg 1) .cse0 (<= 1 ~mode1) (<= ~mode1 1) (<= 1 ~mode2) (<= ~mode2 1) (<= 1 ULTIMATE.start_assert_~arg) .cse1) (and .cse0 (<= 0 ~send1) (= ~mode1 (* 256 (div ~mode1 256))) (= ~mode2 (* 256 (div ~mode2 256))) (<= ~send1 127) (= 0 (+ ~nomsg 1)) .cse1))) [2018-07-25 13:28:48,678 INFO L422 ceAbstractionStarter]: For program point L340(lines 336 347) no Hoare annotation was computed. [2018-07-25 13:28:48,678 INFO L422 ceAbstractionStarter]: For program point L233(lines 233 244) no Hoare annotation was computed. [2018-07-25 13:28:48,679 INFO L418 ceAbstractionStarter]: At program point L361(lines 361 368) the Hoare annotation is: (and (not (= ~p1_old ~nomsg)) (<= ULTIMATE.start_assert_~arg 1) (<= ~r1 0) (<= 1 ~mode1) (<= ~mode1 1) (<= 1 ~mode2) (<= ~mode2 1) (<= 1 ULTIMATE.start_assert_~arg) (<= 0 ~r1)) [2018-07-25 13:28:48,679 INFO L422 ceAbstractionStarter]: For program point L295(lines 287 296) no Hoare annotation was computed. [2018-07-25 13:28:48,691 INFO L202 PluginConnector]: Adding new model pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.07 01:28:48 BoogieIcfgContainer [2018-07-25 13:28:48,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-25 13:28:48,692 INFO L168 Benchmark]: Toolchain (without parser) took 2116.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-07-25 13:28:48,694 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-25 13:28:48,695 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-25 13:28:48,696 INFO L168 Benchmark]: Boogie Preprocessor took 55.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-25 13:28:48,697 INFO L168 Benchmark]: RCFGBuilder took 969.99 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-07-25 13:28:48,698 INFO L168 Benchmark]: TraceAbstraction took 1039.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-07-25 13:28:48,702 INFO L336 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 969.99 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1039.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 375]: 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 - InvariantResult [Line: 361]: Loop Invariant Derived loop invariant: (((((((!(~p1_old == ~nomsg) && assert_~arg <= 1) && ~r1 <= 0) && 1 <= ~mode1) && ~mode1 <= 1) && 1 <= ~mode2) && ~mode2 <= 1) && 1 <= assert_~arg) && 0 <= ~r1 - InvariantResult [Line: 226]: Loop Invariant Derived loop invariant: ((((((((!(~p1_old == ~nomsg) && assert_~arg <= 1) && ~r1 <= 0) && 1 <= ~mode1) && ~mode1 <= 1) && 1 <= ~mode2) && ~mode2 <= 1) && 1 <= assert_~arg) && 0 <= ~r1) || ((((((~r1 <= 0 && 0 <= ~send1) && ~mode1 == 256 * (~mode1 / 256)) && ~mode2 == 256 * (~mode2 / 256)) && ~send1 <= 127) && 0 == ~nomsg + 1) && 0 <= ~r1) - InvariantResult [Line: 367]: Loop Invariant Derived loop invariant: false - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. SAFE Result, 0.9s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 12 SDtfs, 6 SDslu, 19 SDs, 0 SdLazy, 43 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=3, 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, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 9 NumberOfFragments, 95 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1157 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 11/20 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-07-25_13-28-48-715.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-25_13-28-48-715.csv Received shutdown request...