java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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-ff8eab6 [2018-09-26 08:19:27,414 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 08:19:27,416 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 08:19:27,428 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 08:19:27,429 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 08:19:27,430 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 08:19:27,431 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 08:19:27,433 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 08:19:27,436 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 08:19:27,437 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 08:19:27,438 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 08:19:27,455 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-26 08:19:27,455 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-26 08:19:27,456 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-26 08:19:27,457 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-26 08:19:27,458 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-26 08:19:27,459 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-26 08:19:27,460 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-26 08:19:27,460 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-26 08:19:27,461 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-26 08:19:27,464 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf [2018-09-26 08:19:27,472 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 08:19:27,473 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 08:19:27,474 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 08:19:27,474 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-09-26 08:19:27,475 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 08:19:27,475 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-09-26 08:19:27,475 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-09-26 08:19:27,475 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 08:19:27,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 08:19:27,549 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 08:19:27,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 08:19:27,557 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 08:19:27,557 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 08:19:27,558 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl [2018-09-26 08:19:27,559 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl' [2018-09-26 08:19:27,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 08:19:27,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 08:19:27,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 08:19:27,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 08:19:27,675 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 08:19:27,697 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 26.09 08:19:27" (1/1) ... [2018-09-26 08:19:27,719 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 26.09 08:19:27" (1/1) ... [2018-09-26 08:19:27,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 08:19:27,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 08:19:27,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 08:19:27,737 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 08:19:27,748 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 26.09 08:19:27" (1/1) ... [2018-09-26 08:19:27,748 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 26.09 08:19:27" (1/1) ... [2018-09-26 08:19:27,751 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 26.09 08:19:27" (1/1) ... [2018-09-26 08:19:27,752 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 26.09 08:19:27" (1/1) ... [2018-09-26 08:19:27,760 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 26.09 08:19:27" (1/1) ... [2018-09-26 08:19:27,763 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 26.09 08:19:27" (1/1) ... [2018-09-26 08:19:27,765 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 26.09 08:19:27" (1/1) ... [2018-09-26 08:19:27,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 08:19:27,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 08:19:27,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 08:19:27,770 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 08:19:27,771 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 26.09 08:19:27" (1/1) ... [2018-09-26 08:19:27,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 08:19:27,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 08:19:28,804 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 08:19:28,805 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 26.09 08:19:28 BoogieIcfgContainer [2018-09-26 08:19:28,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 08:19:28,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 08:19:28,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 08:19:28,813 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 08:19:28,814 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 26.09 08:19:27" (1/2) ... [2018-09-26 08:19:28,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c2c5ca and model type pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 08:19:28, skipping insertion in model container [2018-09-26 08:19:28,815 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 26.09 08:19:28" (2/2) ... [2018-09-26 08:19:28,818 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c_19.bpl [2018-09-26 08:19:28,829 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-09-26 08:19:28,841 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 08:19:28,893 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 08:19:28,894 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 08:19:28,894 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 08:19:28,895 INFO L383 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-09-26 08:19:28,895 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 08:19:28,895 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 08:19:28,895 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 08:19:28,895 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 08:19:28,896 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 08:19:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-26 08:19:28,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 08:19:28,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:19:28,933 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 08:19:28,935 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:19:28,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:19:28,945 INFO L82 PathProgramCache]: Analyzing trace with hash 998225, now seen corresponding path program 1 times [2018-09-26 08:19:28,953 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:19:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:19:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:19:29,185 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 08:19:29,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 08:19:29,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 08:19:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 08:19:29,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 08:19:29,211 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2018-09-26 08:19:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:19:29,287 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-26 08:19:29,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 08:19:29,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-26 08:19:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:19:29,300 INFO L225 Difference]: With dead ends: 11 [2018-09-26 08:19:29,301 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 08:19:29,304 INFO L605 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 [2018-09-26 08:19:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 08:19:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-09-26 08:19:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 08:19:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 08:19:29,344 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 08:19:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:19:29,345 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 08:19:29,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 08:19:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 08:19:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 08:19:29,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:19:29,346 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-26 08:19:29,346 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:19:29,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:19:29,347 INFO L82 PathProgramCache]: Analyzing trace with hash 959374695, now seen corresponding path program 1 times [2018-09-26 08:19:29,347 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:19:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:19:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:19:29,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:19:29,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-26 08:19:29,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 08:19:29,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 08:19:29,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-26 08:19:29,425 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-09-26 08:19:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:19:29,538 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-26 08:19:29,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 08:19:29,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-09-26 08:19:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:19:29,541 INFO L225 Difference]: With dead ends: 12 [2018-09-26 08:19:29,541 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 08:19:29,542 INFO L605 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 [2018-09-26 08:19:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 08:19:29,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-09-26 08:19:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 08:19:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 08:19:29,549 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-26 08:19:29,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:19:29,550 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 08:19:29,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 08:19:29,550 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 08:19:29,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 08:19:29,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:19:29,551 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-26 08:19:29,552 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:19:29,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:19:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1458806275, now seen corresponding path program 2 times [2018-09-26 08:19:29,553 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:19:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:19:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:19:29,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:19:29,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-26 08:19:29,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 08:19:29,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 08:19:29,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 08:19:29,677 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-09-26 08:19:29,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:19:29,792 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-26 08:19:29,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 08:19:29,793 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-09-26 08:19:29,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:19:29,795 INFO L225 Difference]: With dead ends: 14 [2018-09-26 08:19:29,796 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 08:19:29,796 INFO L605 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 [2018-09-26 08:19:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 08:19:29,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-09-26 08:19:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 08:19:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 08:19:29,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-26 08:19:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:19:29,807 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 08:19:29,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 08:19:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 08:19:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 08:19:29,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:19:29,808 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-26 08:19:29,808 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:19:29,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:19:29,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1753411309, now seen corresponding path program 3 times [2018-09-26 08:19:29,810 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:19:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:19:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-26 08:19:29,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:19:29,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-26 08:19:29,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 08:19:29,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 08:19:29,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 08:19:29,945 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-09-26 08:19:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:19:29,976 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 08:19:29,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 08:19:29,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-09-26 08:19:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:19:29,981 INFO L225 Difference]: With dead ends: 11 [2018-09-26 08:19:29,981 INFO L226 Difference]: Without dead ends: 0 [2018-09-26 08:19:29,982 INFO L605 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 [2018-09-26 08:19:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-26 08:19:29,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-26 08:19:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-26 08:19:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-26 08:19:29,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2018-09-26 08:19:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:19:29,985 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-26 08:19:29,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 08:19:29,985 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-26 08:19:29,985 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-26 08:19:29,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-26 08:19:30,041 INFO L426 ceAbstractionStarter]: For program point L300(lines 300 311) no Hoare annotation was computed. [2018-09-26 08:19:30,041 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 66 376) the Hoare annotation is: true [2018-09-26 08:19:30,042 INFO L426 ceAbstractionStarter]: For program point L317(lines 310 318) no Hoare annotation was computed. [2018-09-26 08:19:30,042 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 66 376) no Hoare annotation was computed. [2018-09-26 08:19:30,042 INFO L426 ceAbstractionStarter]: For program point L251(lines 243 252) no Hoare annotation was computed. [2018-09-26 08:19:30,042 INFO L422 ceAbstractionStarter]: At program point L367(lines 367 374) the Hoare annotation is: false [2018-09-26 08:19:30,042 INFO L422 ceAbstractionStarter]: At program point ULTIMATE.startEXIT(lines 66 376) the Hoare annotation is: false [2018-09-26 08:19:30,042 INFO L426 ceAbstractionStarter]: For program point L256(lines 256 266) no Hoare annotation was computed. [2018-09-26 08:19:30,043 INFO L426 ceAbstractionStarter]: For program point L351(lines 346 352) no Hoare annotation was computed. [2018-09-26 08:19:30,043 INFO L426 ceAbstractionStarter]: For program point L273(lines 265 274) no Hoare annotation was computed. [2018-09-26 08:19:30,043 INFO L426 ceAbstractionStarter]: For program point L331(lines 331 337) no Hoare annotation was computed. [2018-09-26 08:19:30,043 INFO L422 ceAbstractionStarter]: At program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 375) the Hoare annotation is: false [2018-09-26 08:19:30,043 INFO L426 ceAbstractionStarter]: For program point L278(lines 278 288) no Hoare annotation was computed. [2018-09-26 08:19:30,045 INFO L422 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))) [2018-09-26 08:19:30,045 INFO L426 ceAbstractionStarter]: For program point L340(lines 336 347) no Hoare annotation was computed. [2018-09-26 08:19:30,046 INFO L426 ceAbstractionStarter]: For program point L233(lines 233 244) no Hoare annotation was computed. [2018-09-26 08:19:30,046 INFO L422 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)) [2018-09-26 08:19:30,046 INFO L426 ceAbstractionStarter]: For program point L295(lines 287 296) no Hoare annotation was computed. [2018-09-26 08:19:30,061 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 26.09 08:19:30 BoogieIcfgContainer [2018-09-26 08:19:30,062 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 08:19:30,063 INFO L168 Benchmark]: Toolchain (without parser) took 2392.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-09-26 08:19:30,065 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 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. [2018-09-26 08:19:30,066 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.30 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. [2018-09-26 08:19:30,066 INFO L168 Benchmark]: Boogie Preprocessor took 32.43 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. [2018-09-26 08:19:30,067 INFO L168 Benchmark]: RCFGBuilder took 1036.22 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-09-26 08:19:30,068 INFO L168 Benchmark]: TraceAbstraction took 1254.92 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-09-26 08:19:30,072 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 0.24 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 61.30 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 32.43 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 1036.22 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1254.92 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 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, 1.1s 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, 0.2s 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, 0.4s 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-0-2018-09-26_08-19-30-087.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-0-2018-09-26_08-19-30-087.csv Received shutdown request...