java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/programs/regression/bpl/AutomizerBpl-pdr.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/toy.cil.c_34.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 16:17:56,044 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 16:17:56,047 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 16:17:56,064 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 16:17:56,064 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 16:17:56,066 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 16:17:56,067 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 16:17:56,070 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 16:17:56,071 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 16:17:56,074 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 16:17:56,075 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 16:17:56,076 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 16:17:56,080 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 16:17:56,081 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 16:17:56,083 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 16:17:56,088 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 16:17:56,089 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 16:17:56,094 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 16:17:56,098 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 16:17:56,099 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 16:17:56,100 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 16:17:56,105 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 16:17:56,108 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 16:17:56,108 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 16:17:56,108 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 16:17:56,109 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 16:17:56,111 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 16:17:56,112 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 16:17:56,113 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 16:17:56,114 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 16:17:56,114 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 16:17:56,115 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-23 16:17:56,115 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-23 16:17:56,115 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-23 16:17:56,116 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-23 16:17:56,117 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-23 16:17:56,117 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/regression/bpl/AutomizerBpl-pdr.epf [2018-07-23 16:17:56,125 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 16:17:56,125 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 16:17:56,126 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 16:17:56,126 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=PDR [2018-07-23 16:17:56,127 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 16:17:56,127 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 16:17:56,173 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 16:17:56,192 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 16:17:56,199 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 16:17:56,201 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 16:17:56,201 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 16:17:56,202 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/toy.cil.c_34.bpl [2018-07-23 16:17:56,202 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/toy.cil.c_34.bpl' [2018-07-23 16:17:56,281 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 16:17:56,283 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 16:17:56,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 16:17:56,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 16:17:56,284 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 16:17:56,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:17:56" (1/1) ... [2018-07-23 16:17:56,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:17:56" (1/1) ... [2018-07-23 16:17:56,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:17:56" (1/1) ... [2018-07-23 16:17:56,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:17:56" (1/1) ... [2018-07-23 16:17:56,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:17:56" (1/1) ... [2018-07-23 16:17:56,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:17:56" (1/1) ... [2018-07-23 16:17:56,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:17:56" (1/1) ... [2018-07-23 16:17:56,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 16:17:56,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 16:17:56,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 16:17:56,349 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 16:17:56,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:17:56" (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 [2018-07-23 16:17:56,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 16:17:56,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 16:17:57,831 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 16:17:57,832 INFO L202 PluginConnector]: Adding new model toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 04:17:57 BoogieIcfgContainer [2018-07-23 16:17:57,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 16:17:57,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 16:17:57,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 16:17:57,839 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 16:17:57,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:17:56" (1/2) ... [2018-07-23 16:17:57,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b0a99d and model type toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 04:17:57, skipping insertion in model container [2018-07-23 16:17:57,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 04:17:57" (2/2) ... [2018-07-23 16:17:57,842 INFO L112 eAbstractionObserver]: Analyzing ICFG toy.cil.c_34.bpl [2018-07-23 16:17:57,853 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:PDR Determinization: PREDICATE_ABSTRACTION [2018-07-23 16:17:57,867 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 16:17:57,911 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 16:17:57,912 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 16:17:57,912 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 16:17:57,913 INFO L375 AbstractCegarLoop]: Compute interpolants for PDR [2018-07-23 16:17:57,913 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 16:17:57,913 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 16:17:57,913 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 16:17:57,913 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 16:17:57,914 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 16:17:57,929 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-07-23 16:17:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 16:17:57,938 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 16:17:57,939 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 16:17:57,940 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 16:17:57,945 INFO L82 PathProgramCache]: Analyzing trace with hash 89968813, now seen corresponding path program 1 times [2018-07-23 16:17:57,951 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 16:17:58,141 WARN L169 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-23 16:17:58,454 WARN L169 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-07-23 16:17:58,802 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 16:17:58,802 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-23 16:17:58,807 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 16:17:58,813 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 16:17:58,814 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-23 16:17:58,817 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 5 states. [2018-07-23 16:17:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 16:17:58,990 INFO L93 Difference]: Finished difference Result 35 states and 52 transitions. [2018-07-23 16:17:58,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 16:17:58,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-07-23 16:17:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 16:17:59,008 INFO L225 Difference]: With dead ends: 35 [2018-07-23 16:17:59,008 INFO L226 Difference]: Without dead ends: 24 [2018-07-23 16:17:59,012 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-23 16:17:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-23 16:17:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2018-07-23 16:17:59,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 16:17:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2018-07-23 16:17:59,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 8 [2018-07-23 16:17:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 16:17:59,061 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2018-07-23 16:17:59,061 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 16:17:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2018-07-23 16:17:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-23 16:17:59,062 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 16:17:59,062 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 16:17:59,062 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 16:17:59,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1788119378, now seen corresponding path program 1 times [2018-07-23 16:17:59,063 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 16:17:59,468 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2018-07-23 16:18:00,770 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2018-07-23 16:18:00,848 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 16:18:00,848 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-23 16:18:00,850 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 16:18:00,850 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 16:18:00,851 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-07-23 16:18:00,851 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand 7 states. [2018-07-23 16:18:01,252 WARN L169 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 194 [2018-07-23 16:18:01,604 WARN L169 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 195 [2018-07-23 16:18:02,343 WARN L169 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 194 [2018-07-23 16:18:02,765 WARN L169 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 194 [2018-07-23 16:18:03,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 16:18:03,437 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2018-07-23 16:18:03,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 16:18:03,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-07-23 16:18:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 16:18:03,440 INFO L225 Difference]: With dead ends: 39 [2018-07-23 16:18:03,440 INFO L226 Difference]: Without dead ends: 37 [2018-07-23 16:18:03,442 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 277 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2018-07-23 16:18:03,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-23 16:18:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-07-23 16:18:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-23 16:18:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2018-07-23 16:18:03,465 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 12 [2018-07-23 16:18:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 16:18:03,465 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2018-07-23 16:18:03,465 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 16:18:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2018-07-23 16:18:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 16:18:03,466 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 16:18:03,466 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 16:18:03,467 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 16:18:03,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1141495670, now seen corresponding path program 1 times [2018-07-23 16:18:03,467 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 16:18:04,527 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 187 [2018-07-23 16:18:05,915 WARN L169 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2018-07-23 16:18:06,550 WARN L169 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2018-07-23 16:18:07,084 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 16:18:07,084 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-07-23 16:18:07,085 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 16:18:07,085 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 16:18:07,085 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2018-07-23 16:18:07,086 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 8 states. [2018-07-23 16:18:07,530 WARN L169 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 212 [2018-07-23 16:18:07,812 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2018-07-23 16:18:08,128 WARN L169 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 212 [2018-07-23 16:18:09,266 WARN L169 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 194 [2018-07-23 16:18:09,710 WARN L169 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 194 [2018-07-23 16:18:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 16:18:10,540 INFO L93 Difference]: Finished difference Result 58 states and 85 transitions. [2018-07-23 16:18:10,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 16:18:10,541 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-07-23 16:18:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 16:18:10,543 INFO L225 Difference]: With dead ends: 58 [2018-07-23 16:18:10,543 INFO L226 Difference]: Without dead ends: 56 [2018-07-23 16:18:10,544 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 938 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2018-07-23 16:18:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-07-23 16:18:10,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 23. [2018-07-23 16:18:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 16:18:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2018-07-23 16:18:10,575 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 13 [2018-07-23 16:18:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 16:18:10,575 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2018-07-23 16:18:10,576 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 16:18:10,576 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2018-07-23 16:18:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 16:18:10,577 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 16:18:10,577 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-23 16:18:10,577 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 16:18:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1406268936, now seen corresponding path program 1 times [2018-07-23 16:18:10,577 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 16:18:11,213 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 141 [2018-07-23 16:18:11,827 WARN L169 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2018-07-23 16:18:12,697 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 16:18:12,697 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-23 16:18:12,698 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 16:18:12,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 16:18:12,698 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2018-07-23 16:18:12,699 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand 6 states. [2018-07-23 16:18:13,099 WARN L169 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 238 [2018-07-23 16:18:13,420 WARN L169 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 174 [2018-07-23 16:18:14,112 WARN L169 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2018-07-23 16:18:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 16:18:14,611 INFO L93 Difference]: Finished difference Result 46 states and 68 transitions. [2018-07-23 16:18:14,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 16:18:14,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-07-23 16:18:14,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 16:18:14,613 INFO L225 Difference]: With dead ends: 46 [2018-07-23 16:18:14,613 INFO L226 Difference]: Without dead ends: 44 [2018-07-23 16:18:14,614 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 868 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2018-07-23 16:18:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-23 16:18:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2018-07-23 16:18:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-23 16:18:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-07-23 16:18:14,681 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 14 [2018-07-23 16:18:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 16:18:14,682 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-07-23 16:18:14,682 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 16:18:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-07-23 16:18:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-23 16:18:14,683 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 16:18:14,683 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-23 16:18:14,683 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 16:18:14,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1625296163, now seen corresponding path program 1 times [2018-07-23 16:18:14,684 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 16:18:16,165 WARN L169 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2018-07-23 16:18:16,574 WARN L169 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2018-07-23 16:18:17,415 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 16:18:17,416 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-23 16:18:17,416 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 16:18:17,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 16:18:17,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2018-07-23 16:18:17,417 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 7 states. [2018-07-23 16:18:17,922 WARN L169 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 238 [2018-07-23 16:18:18,432 WARN L169 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 239 [2018-07-23 16:18:18,690 WARN L169 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 174 [2018-07-23 16:18:19,168 WARN L169 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 225 [2018-07-23 16:18:20,114 WARN L169 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 223 [2018-07-23 16:18:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 16:18:20,893 INFO L93 Difference]: Finished difference Result 54 states and 81 transitions. [2018-07-23 16:18:20,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 16:18:20,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-07-23 16:18:20,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 16:18:20,895 INFO L225 Difference]: With dead ends: 54 [2018-07-23 16:18:20,895 INFO L226 Difference]: Without dead ends: 52 [2018-07-23 16:18:20,896 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 997 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2018-07-23 16:18:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-07-23 16:18:20,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2018-07-23 16:18:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-23 16:18:20,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-07-23 16:18:20,982 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 18 [2018-07-23 16:18:20,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 16:18:20,983 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-07-23 16:18:20,983 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 16:18:20,983 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-07-23 16:18:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-23 16:18:20,984 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 16:18:20,984 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 16:18:20,984 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 16:18:20,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1420888944, now seen corresponding path program 1 times [2018-07-23 16:18:20,985 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 16:18:22,612 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2018-07-23 16:18:24,727 WARN L169 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2018-07-23 16:18:25,295 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2018-07-23 16:18:36,905 WARN L169 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2018-07-23 16:18:37,405 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 16:18:37,405 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-07-23 16:18:37,405 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 16:18:37,406 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 16:18:37,407 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 16:18:37,408 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 9 states. [2018-07-23 16:18:38,291 WARN L169 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 421 [2018-07-23 16:18:38,850 WARN L169 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 181 [2018-07-23 16:18:39,902 WARN L169 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 421 [2018-07-23 16:18:43,136 WARN L169 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 315 [2018-07-23 16:19:09,296 WARN L169 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 181 [2018-07-23 16:19:10,547 WARN L169 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 410 [2018-07-23 16:19:12,089 WARN L169 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 321 [2018-07-23 16:19:37,950 WARN L169 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 421 [2018-07-23 16:19:39,594 WARN L169 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 421 [2018-07-23 16:19:41,621 WARN L169 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 315 [2018-07-23 16:20:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 16:20:05,740 INFO L93 Difference]: Finished difference Result 79 states and 118 transitions. [2018-07-23 16:20:05,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 16:20:05,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2018-07-23 16:20:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 16:20:05,742 INFO L225 Difference]: With dead ends: 79 [2018-07-23 16:20:05,742 INFO L226 Difference]: Without dead ends: 77 [2018-07-23 16:20:05,743 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3058 GetRequests, 3005 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=527, Invalid=1923, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 16:20:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-23 16:20:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2018-07-23 16:20:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-23 16:20:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 69 transitions. [2018-07-23 16:20:05,884 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 69 transitions. Word has length 18 [2018-07-23 16:20:05,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 16:20:05,884 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 69 transitions. [2018-07-23 16:20:05,884 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 16:20:05,885 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 69 transitions. [2018-07-23 16:20:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 16:20:05,885 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 16:20:05,886 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 16:20:05,886 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 16:20:05,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1665340929, now seen corresponding path program 1 times [2018-07-23 16:20:05,886 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 16:20:07,785 WARN L169 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2018-07-23 16:20:08,212 WARN L169 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2018-07-23 16:20:09,044 WARN L169 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2018-07-23 16:20:09,330 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2018-07-23 16:20:10,463 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 16:20:10,463 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-07-23 16:20:10,463 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 16:20:10,464 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 16:20:10,464 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 16:20:10,464 INFO L87 Difference]: Start difference. First operand 46 states and 69 transitions. Second operand 8 states. [2018-07-23 16:20:11,071 WARN L169 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 256 [2018-07-23 16:20:11,890 WARN L169 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 256 [2018-07-23 16:20:12,540 WARN L169 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 243 [2018-07-23 16:20:13,996 WARN L169 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 223 [2018-07-23 16:20:14,953 WARN L169 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 219 [2018-07-23 16:20:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 16:20:16,495 INFO L93 Difference]: Finished difference Result 89 states and 132 transitions. [2018-07-23 16:20:16,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 16:20:16,496 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-07-23 16:20:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 16:20:16,497 INFO L225 Difference]: With dead ends: 89 [2018-07-23 16:20:16,497 INFO L226 Difference]: Without dead ends: 87 [2018-07-23 16:20:16,498 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1460 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 16:20:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-23 16:20:16,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 46. [2018-07-23 16:20:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-23 16:20:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 69 transitions. [2018-07-23 16:20:16,669 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 69 transitions. Word has length 19 [2018-07-23 16:20:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 16:20:16,670 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 69 transitions. [2018-07-23 16:20:16,670 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 16:20:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 69 transitions. [2018-07-23 16:20:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 16:20:16,671 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 16:20:16,671 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 16:20:16,671 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 16:20:16,671 INFO L82 PathProgramCache]: Analyzing trace with hash 764186654, now seen corresponding path program 1 times [2018-07-23 16:20:16,671 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 16:20:18,096 WARN L169 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2018-07-23 16:20:20,321 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2018-07-23 16:20:20,842 WARN L169 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 181 [2018-07-23 16:20:21,713 WARN L169 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2018-07-23 16:20:24,874 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2018-07-23 16:20:25,296 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 16:20:25,296 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-07-23 16:20:25,296 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 16:20:25,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 16:20:25,297 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 16:20:25,297 INFO L87 Difference]: Start difference. First operand 46 states and 69 transitions. Second operand 9 states. [2018-07-23 16:20:27,979 WARN L169 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 492 DAG size of output: 472 [2018-07-23 16:20:28,786 WARN L169 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 207 [2018-07-23 16:20:29,874 WARN L169 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 272 [2018-07-23 16:20:44,183 WARN L169 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 477 DAG size of output: 459 [2018-07-23 16:20:50,672 WARN L169 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 406 [2018-07-23 16:20:51,996 WARN L169 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 240 [2018-07-23 16:20:53,315 WARN L169 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 197 [2018-07-23 16:20:54,804 WARN L169 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 262 [2018-07-23 16:20:56,107 WARN L169 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 408 [2018-07-23 16:20:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 16:20:59,552 INFO L93 Difference]: Finished difference Result 100 states and 148 transitions. [2018-07-23 16:20:59,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 16:20:59,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-07-23 16:20:59,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 16:20:59,554 INFO L225 Difference]: With dead ends: 100 [2018-07-23 16:20:59,554 INFO L226 Difference]: Without dead ends: 98 [2018-07-23 16:20:59,555 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2472 GetRequests, 2426 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=422, Invalid=1558, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 16:20:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-07-23 16:20:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2018-07-23 16:20:59,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-07-23 16:20:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 105 transitions. [2018-07-23 16:20:59,873 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 105 transitions. Word has length 19 [2018-07-23 16:20:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 16:20:59,874 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 105 transitions. [2018-07-23 16:20:59,874 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 16:20:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 105 transitions. [2018-07-23 16:20:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-23 16:20:59,875 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 16:20:59,875 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 16:20:59,876 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 16:20:59,876 INFO L82 PathProgramCache]: Analyzing trace with hash -732860839, now seen corresponding path program 1 times [2018-07-23 16:20:59,876 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 16:21:01,693 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2018-07-23 16:21:02,146 WARN L169 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2018-07-23 16:21:03,182 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-07-23 16:21:05,219 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2018-07-23 16:21:05,971 WARN L169 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 181 [2018-07-23 16:21:06,828 WARN L169 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2018-07-23 16:21:22,587 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2018-07-23 16:21:25,686 WARN L169 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 410 [2018-07-23 16:21:26,313 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 16:21:26,313 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-07-23 16:21:26,314 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 16:21:26,314 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 16:21:26,314 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 16:21:26,314 INFO L87 Difference]: Start difference. First operand 69 states and 105 transitions. Second operand 9 states. [2018-07-23 16:21:28,006 WARN L169 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 505 DAG size of output: 471 [2018-07-23 16:21:28,922 WARN L169 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 207 [2018-07-23 16:21:31,744 WARN L169 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 503 DAG size of output: 472 [2018-07-23 16:21:33,314 WARN L169 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 272 [2018-07-23 16:21:44,591 WARN L169 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 409 [2018-07-23 16:21:47,193 WARN L169 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 493 DAG size of output: 458 [2018-07-23 16:21:54,187 WARN L169 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 481 DAG size of output: 448 [2018-07-23 16:21:56,779 WARN L169 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 407 [2018-07-23 16:22:04,039 WARN L169 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 262 [2018-07-23 16:22:08,498 WARN L169 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 197 [2018-07-23 16:22:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 16:22:09,519 INFO L93 Difference]: Finished difference Result 152 states and 227 transitions. [2018-07-23 16:22:09,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 16:22:09,520 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-07-23 16:22:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 16:22:09,521 INFO L225 Difference]: With dead ends: 152 [2018-07-23 16:22:09,521 INFO L226 Difference]: Without dead ends: 150 [2018-07-23 16:22:09,523 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3210 GetRequests, 3157 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=548, Invalid=2002, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 16:22:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-07-23 16:22:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 89. [2018-07-23 16:22:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 16:22:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 137 transitions. [2018-07-23 16:22:10,003 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 137 transitions. Word has length 23 [2018-07-23 16:22:10,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 16:22:10,004 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 137 transitions. [2018-07-23 16:22:10,004 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 16:22:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 137 transitions. [2018-07-23 16:22:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-23 16:22:10,005 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 16:22:10,005 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 16:22:10,005 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 16:22:10,006 INFO L82 PathProgramCache]: Analyzing trace with hash -480494391, now seen corresponding path program 1 times [2018-07-23 16:22:10,006 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 16:22:11,356 WARN L169 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2018-07-23 16:22:13,524 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2018-07-23 16:22:17,257 WARN L169 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2018-07-23 16:22:19,816 WARN L169 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2018-07-23 16:22:21,822 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 203 [2018-07-23 16:22:24,237 WARN L169 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 276 [2018-07-23 16:22:25,672 WARN L169 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2018-07-23 16:22:31,461 WARN L169 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 395 Received shutdown request... [2018-07-23 16:22:37,664 WARN L177 SmtUtils]: Removed 2 from assertion stack [2018-07-23 16:22:37,665 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 16:22:37,670 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 16:22:37,670 INFO L202 PluginConnector]: Adding new model toy.cil.c_34.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 04:22:37 BoogieIcfgContainer [2018-07-23 16:22:37,670 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 16:22:37,671 INFO L168 Benchmark]: Toolchain (without parser) took 281389.31 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 61.9 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 68.0 MB). Peak memory consumption was 129.9 MB. Max. memory is 7.1 GB. [2018-07-23 16:22:37,672 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-07-23 16:22:37,673 INFO L168 Benchmark]: Boogie Preprocessor took 64.46 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. [2018-07-23 16:22:37,673 INFO L168 Benchmark]: RCFGBuilder took 1483.65 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-07-23 16:22:37,674 INFO L168 Benchmark]: TraceAbstraction took 279835.61 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 61.9 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 4.6 MB). Peak memory consumption was 66.4 MB. Max. memory is 7.1 GB. [2018-07-23 16:22:37,677 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 0.20 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 64.46 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 1483.65 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 279835.61 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 61.9 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 4.6 MB). Peak memory consumption was 66.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 333]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 333). Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 4, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 315. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. TIMEOUT Result, 279.7s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 183.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 57 SDtfs, 318 SDslu, 121 SDs, 0 SdLazy, 706 SolverSat, 335 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 132.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13600 GetRequests, 13303 SyntacticMatches, 28 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3852 ImplicationChecksByTransitivity, 95.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=9, 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: 1.3s AutomataMinimizationTime, 9 MinimizatonAttempts, 247 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 67.1s PdrRuntime, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/toy.cil.c_34.bpl_AutomizerBpl-pdr.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_16-22-37-692.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/toy.cil.c_34.bpl_AutomizerBpl-pdr.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_16-22-37-692.csv Completed graceful shutdown