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 --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/optional_data_creation_test04_true-valid-memsafety.i_32.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-093a8c0 [2018-10-14 16:50:56,383 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-14 16:50:56,386 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-14 16:50:56,398 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-14 16:50:56,398 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-14 16:50:56,399 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-14 16:50:56,401 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-14 16:50:56,403 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-14 16:50:56,404 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-14 16:50:56,405 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-14 16:50:56,406 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-14 16:50:56,407 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-14 16:50:56,408 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-14 16:50:56,409 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-14 16:50:56,410 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-14 16:50:56,411 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-14 16:50:56,411 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-14 16:50:56,413 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-14 16:50:56,415 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-14 16:50:56,417 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-14 16:50:56,418 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-14 16:50:56,420 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-14 16:50:56,422 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-14 16:50:56,422 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-14 16:50:56,423 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-14 16:50:56,425 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-14 16:50:56,426 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-14 16:50:56,426 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-14 16:50:56,430 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-14 16:50:56,431 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-14 16:50:56,432 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-14 16:50:56,433 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-14 16:50:56,434 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-14 16:50:56,434 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-14 16:50:56,436 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-14 16:50:56,437 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-14 16:50:56,437 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-14 16:50:56,457 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-14 16:50:56,459 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-14 16:50:56,460 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-14 16:50:56,461 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-14 16:50:56,461 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-14 16:50:56,461 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-14 16:50:56,462 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-14 16:50:56,462 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-14 16:50:56,463 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-14 16:50:56,463 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-14 16:50:56,463 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-14 16:50:56,463 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-14 16:50:56,463 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-14 16:50:56,465 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-14 16:50:56,465 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-14 16:50:56,518 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-14 16:50:56,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-14 16:50:56,541 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-14 16:50:56,542 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-14 16:50:56,543 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-14 16:50:56,544 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/optional_data_creation_test04_true-valid-memsafety.i_32.bpl [2018-10-14 16:50:56,544 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/optional_data_creation_test04_true-valid-memsafety.i_32.bpl' [2018-10-14 16:50:56,636 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-14 16:50:56,637 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-14 16:50:56,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-14 16:50:56,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-14 16:50:56,638 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-14 16:50:56,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:50:56" (1/1) ... [2018-10-14 16:50:56,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:50:56" (1/1) ... [2018-10-14 16:50:56,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:50:56" (1/1) ... [2018-10-14 16:50:56,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:50:56" (1/1) ... [2018-10-14 16:50:56,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:50:56" (1/1) ... [2018-10-14 16:50:56,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:50:56" (1/1) ... [2018-10-14 16:50:56,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:50:56" (1/1) ... [2018-10-14 16:50:56,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-14 16:50:56,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-14 16:50:56,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-14 16:50:56,706 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-14 16:50:56,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:50:56" (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 [2018-10-14 16:50:56,776 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-14 16:50:56,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-14 16:50:56,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-14 16:50:57,682 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-14 16:50:57,683 INFO L202 PluginConnector]: Adding new model optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:50:57 BoogieIcfgContainer [2018-10-14 16:50:57,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-14 16:50:57,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-14 16:50:57,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-14 16:50:57,688 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-14 16:50:57,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:50:56" (1/2) ... [2018-10-14 16:50:57,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2727af76 and model type optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:50:57, skipping insertion in model container [2018-10-14 16:50:57,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:50:57" (2/2) ... [2018-10-14 16:50:57,692 INFO L112 eAbstractionObserver]: Analyzing ICFG optional_data_creation_test04_true-valid-memsafety.i_32.bpl [2018-10-14 16:50:57,702 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-14 16:50:57,711 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-14 16:50:57,728 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-14 16:50:57,758 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-14 16:50:57,758 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-14 16:50:57,759 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-14 16:50:57,759 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-14 16:50:57,759 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-14 16:50:57,759 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-14 16:50:57,759 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-14 16:50:57,760 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-14 16:50:57,760 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-14 16:50:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states. [2018-10-14 16:50:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-14 16:50:57,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:50:57,801 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:50:57,802 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:50:57,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:50:57,811 INFO L82 PathProgramCache]: Analyzing trace with hash 266737070, now seen corresponding path program 1 times [2018-10-14 16:50:57,876 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:50:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:50:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:50:58,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:50:58,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-14 16:50:58,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-14 16:50:58,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-14 16:50:58,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-14 16:50:58,211 INFO L87 Difference]: Start difference. First operand 126 states. Second operand 3 states. [2018-10-14 16:50:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:50:58,295 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-14 16:50:58,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-14 16:50:58,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2018-10-14 16:50:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:50:58,317 INFO L225 Difference]: With dead ends: 146 [2018-10-14 16:50:58,317 INFO L226 Difference]: Without dead ends: 146 [2018-10-14 16:50:58,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-14 16:50:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-14 16:50:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 125. [2018-10-14 16:50:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-14 16:50:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-14 16:50:58,369 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 101 [2018-10-14 16:50:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:50:58,370 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-14 16:50:58,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-14 16:50:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-14 16:50:58,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-14 16:50:58,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:50:58,375 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:50:58,375 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:50:58,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:50:58,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1125583718, now seen corresponding path program 1 times [2018-10-14 16:50:58,377 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:50:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:50:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:50:58,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:50:58,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-14 16:50:58,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-14 16:50:58,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-14 16:50:58,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-14 16:50:58,642 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 5 states. [2018-10-14 16:50:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:50:58,899 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-14 16:50:58,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-14 16:50:58,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2018-10-14 16:50:58,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:50:58,903 INFO L225 Difference]: With dead ends: 169 [2018-10-14 16:50:58,903 INFO L226 Difference]: Without dead ends: 169 [2018-10-14 16:50:58,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-14 16:50:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-14 16:50:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 148. [2018-10-14 16:50:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-14 16:50:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-14 16:50:58,922 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 124 [2018-10-14 16:50:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:50:58,923 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-14 16:50:58,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-14 16:50:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-14 16:50:58,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-14 16:50:58,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:50:58,926 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:50:58,926 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:50:58,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:50:58,927 INFO L82 PathProgramCache]: Analyzing trace with hash 956042286, now seen corresponding path program 2 times [2018-10-14 16:50:58,928 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:50:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:50:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:50:59,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:50:59,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-14 16:50:59,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-14 16:50:59,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-14 16:50:59,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-14 16:50:59,562 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 7 states. [2018-10-14 16:51:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:00,062 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2018-10-14 16:51:00,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-14 16:51:00,064 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2018-10-14 16:51:00,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:00,069 INFO L225 Difference]: With dead ends: 192 [2018-10-14 16:51:00,070 INFO L226 Difference]: Without dead ends: 192 [2018-10-14 16:51:00,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-10-14 16:51:00,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-14 16:51:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 171. [2018-10-14 16:51:00,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-14 16:51:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-14 16:51:00,097 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 147 [2018-10-14 16:51:00,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:00,100 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-14 16:51:00,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-14 16:51:00,100 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-14 16:51:00,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-14 16:51:00,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:00,107 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:00,107 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:00,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:00,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1404719590, now seen corresponding path program 3 times [2018-10-14 16:51:00,109 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:00,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:00,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-14 16:51:00,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-14 16:51:00,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-14 16:51:00,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-14 16:51:00,511 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 9 states. [2018-10-14 16:51:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:00,974 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-10-14 16:51:00,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-14 16:51:00,975 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 170 [2018-10-14 16:51:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:00,977 INFO L225 Difference]: With dead ends: 215 [2018-10-14 16:51:00,977 INFO L226 Difference]: Without dead ends: 215 [2018-10-14 16:51:00,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2018-10-14 16:51:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-14 16:51:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 194. [2018-10-14 16:51:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-14 16:51:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-10-14 16:51:01,002 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 170 [2018-10-14 16:51:01,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:01,005 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-10-14 16:51:01,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-14 16:51:01,005 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-10-14 16:51:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-14 16:51:01,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:01,012 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:01,013 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:01,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:01,015 INFO L82 PathProgramCache]: Analyzing trace with hash -484007250, now seen corresponding path program 4 times [2018-10-14 16:51:01,016 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:01,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:01,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-14 16:51:01,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-14 16:51:01,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-14 16:51:01,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-14 16:51:01,390 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 11 states. [2018-10-14 16:51:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:01,716 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-10-14 16:51:01,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-14 16:51:01,717 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 193 [2018-10-14 16:51:01,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:01,719 INFO L225 Difference]: With dead ends: 238 [2018-10-14 16:51:01,719 INFO L226 Difference]: Without dead ends: 238 [2018-10-14 16:51:01,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-10-14 16:51:01,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-10-14 16:51:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 217. [2018-10-14 16:51:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-14 16:51:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-10-14 16:51:01,728 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 193 [2018-10-14 16:51:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:01,729 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-10-14 16:51:01,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-14 16:51:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-10-14 16:51:01,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-14 16:51:01,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:01,733 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:01,734 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:01,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:01,734 INFO L82 PathProgramCache]: Analyzing trace with hash 492423066, now seen corresponding path program 5 times [2018-10-14 16:51:01,735 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:02,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:02,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-14 16:51:02,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-14 16:51:02,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-14 16:51:02,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-10-14 16:51:02,193 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 13 states. [2018-10-14 16:51:02,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:02,569 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-10-14 16:51:02,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-14 16:51:02,570 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 216 [2018-10-14 16:51:02,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:02,572 INFO L225 Difference]: With dead ends: 261 [2018-10-14 16:51:02,572 INFO L226 Difference]: Without dead ends: 261 [2018-10-14 16:51:02,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2018-10-14 16:51:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-14 16:51:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 240. [2018-10-14 16:51:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-10-14 16:51:02,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 240 transitions. [2018-10-14 16:51:02,585 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 240 transitions. Word has length 216 [2018-10-14 16:51:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:02,585 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 240 transitions. [2018-10-14 16:51:02,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-14 16:51:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 240 transitions. [2018-10-14 16:51:02,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-10-14 16:51:02,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:02,597 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:02,597 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:02,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:02,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1555179218, now seen corresponding path program 6 times [2018-10-14 16:51:02,599 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:03,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:03,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-14 16:51:03,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-14 16:51:03,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-14 16:51:03,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-10-14 16:51:03,209 INFO L87 Difference]: Start difference. First operand 240 states and 240 transitions. Second operand 15 states. [2018-10-14 16:51:03,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:03,521 INFO L93 Difference]: Finished difference Result 284 states and 284 transitions. [2018-10-14 16:51:03,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-14 16:51:03,522 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 239 [2018-10-14 16:51:03,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:03,524 INFO L225 Difference]: With dead ends: 284 [2018-10-14 16:51:03,524 INFO L226 Difference]: Without dead ends: 284 [2018-10-14 16:51:03,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2018-10-14 16:51:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2018-10-14 16:51:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 263. [2018-10-14 16:51:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-14 16:51:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-10-14 16:51:03,534 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 239 [2018-10-14 16:51:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:03,535 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-10-14 16:51:03,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-14 16:51:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-10-14 16:51:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-14 16:51:03,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:03,540 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:03,540 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:03,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1983725850, now seen corresponding path program 7 times [2018-10-14 16:51:03,542 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:04,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:04,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-14 16:51:04,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-14 16:51:04,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-14 16:51:04,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-10-14 16:51:04,236 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 17 states. [2018-10-14 16:51:04,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:04,578 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2018-10-14 16:51:04,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-14 16:51:04,578 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 262 [2018-10-14 16:51:04,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:04,580 INFO L225 Difference]: With dead ends: 307 [2018-10-14 16:51:04,580 INFO L226 Difference]: Without dead ends: 307 [2018-10-14 16:51:04,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2018-10-14 16:51:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-10-14 16:51:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 286. [2018-10-14 16:51:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-10-14 16:51:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 286 transitions. [2018-10-14 16:51:04,586 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 286 transitions. Word has length 262 [2018-10-14 16:51:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:04,587 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 286 transitions. [2018-10-14 16:51:04,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-14 16:51:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 286 transitions. [2018-10-14 16:51:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-10-14 16:51:04,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:04,589 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:04,589 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:04,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:04,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1202081874, now seen corresponding path program 8 times [2018-10-14 16:51:04,591 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:05,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:05,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-14 16:51:05,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-14 16:51:05,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-14 16:51:05,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-10-14 16:51:05,731 INFO L87 Difference]: Start difference. First operand 286 states and 286 transitions. Second operand 19 states. [2018-10-14 16:51:06,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:06,620 INFO L93 Difference]: Finished difference Result 330 states and 330 transitions. [2018-10-14 16:51:06,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-14 16:51:06,620 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 285 [2018-10-14 16:51:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:06,623 INFO L225 Difference]: With dead ends: 330 [2018-10-14 16:51:06,623 INFO L226 Difference]: Without dead ends: 330 [2018-10-14 16:51:06,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2018-10-14 16:51:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2018-10-14 16:51:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 309. [2018-10-14 16:51:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-10-14 16:51:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 309 transitions. [2018-10-14 16:51:06,630 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 309 transitions. Word has length 285 [2018-10-14 16:51:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:06,631 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 309 transitions. [2018-10-14 16:51:06,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-14 16:51:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 309 transitions. [2018-10-14 16:51:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-10-14 16:51:06,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:06,633 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:06,633 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:06,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash 856169114, now seen corresponding path program 9 times [2018-10-14 16:51:06,634 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:07,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:07,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-14 16:51:07,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-14 16:51:07,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-14 16:51:07,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-10-14 16:51:07,068 INFO L87 Difference]: Start difference. First operand 309 states and 309 transitions. Second operand 21 states. [2018-10-14 16:51:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:07,463 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2018-10-14 16:51:07,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-14 16:51:07,464 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 308 [2018-10-14 16:51:07,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:07,466 INFO L225 Difference]: With dead ends: 353 [2018-10-14 16:51:07,466 INFO L226 Difference]: Without dead ends: 353 [2018-10-14 16:51:07,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=984, Unknown=0, NotChecked=0, Total=1482 [2018-10-14 16:51:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2018-10-14 16:51:07,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 332. [2018-10-14 16:51:07,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-10-14 16:51:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 332 transitions. [2018-10-14 16:51:07,474 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 332 transitions. Word has length 308 [2018-10-14 16:51:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:07,474 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 332 transitions. [2018-10-14 16:51:07,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-14 16:51:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 332 transitions. [2018-10-14 16:51:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2018-10-14 16:51:07,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:07,477 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:07,477 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:07,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1959647698, now seen corresponding path program 10 times [2018-10-14 16:51:07,478 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 1045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:07,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:07,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-14 16:51:07,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-14 16:51:07,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-14 16:51:07,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2018-10-14 16:51:07,922 INFO L87 Difference]: Start difference. First operand 332 states and 332 transitions. Second operand 23 states. [2018-10-14 16:51:08,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:08,373 INFO L93 Difference]: Finished difference Result 376 states and 376 transitions. [2018-10-14 16:51:08,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-14 16:51:08,374 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 331 [2018-10-14 16:51:08,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:08,377 INFO L225 Difference]: With dead ends: 376 [2018-10-14 16:51:08,377 INFO L226 Difference]: Without dead ends: 376 [2018-10-14 16:51:08,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2018-10-14 16:51:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-10-14 16:51:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 355. [2018-10-14 16:51:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-10-14 16:51:08,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2018-10-14 16:51:08,385 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 331 [2018-10-14 16:51:08,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:08,385 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2018-10-14 16:51:08,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-14 16:51:08,385 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2018-10-14 16:51:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-14 16:51:08,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:08,388 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:08,388 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:08,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:08,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1708282906, now seen corresponding path program 11 times [2018-10-14 16:51:08,389 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:09,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:09,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-14 16:51:09,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-14 16:51:09,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-14 16:51:09,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-10-14 16:51:09,463 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand 25 states. [2018-10-14 16:51:10,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:10,579 INFO L93 Difference]: Finished difference Result 399 states and 399 transitions. [2018-10-14 16:51:10,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-14 16:51:10,581 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 354 [2018-10-14 16:51:10,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:10,584 INFO L225 Difference]: With dead ends: 399 [2018-10-14 16:51:10,584 INFO L226 Difference]: Without dead ends: 399 [2018-10-14 16:51:10,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2018-10-14 16:51:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-10-14 16:51:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 378. [2018-10-14 16:51:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2018-10-14 16:51:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 378 transitions. [2018-10-14 16:51:10,592 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 378 transitions. Word has length 354 [2018-10-14 16:51:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:10,593 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 378 transitions. [2018-10-14 16:51:10,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-14 16:51:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 378 transitions. [2018-10-14 16:51:10,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-10-14 16:51:10,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:10,597 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:10,597 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:10,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash 784284846, now seen corresponding path program 12 times [2018-10-14 16:51:10,598 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 1530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:11,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:11,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-14 16:51:11,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-14 16:51:11,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-14 16:51:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2018-10-14 16:51:11,201 INFO L87 Difference]: Start difference. First operand 378 states and 378 transitions. Second operand 27 states. [2018-10-14 16:51:12,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:12,132 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2018-10-14 16:51:12,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-14 16:51:12,133 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 377 [2018-10-14 16:51:12,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:12,135 INFO L225 Difference]: With dead ends: 422 [2018-10-14 16:51:12,135 INFO L226 Difference]: Without dead ends: 422 [2018-10-14 16:51:12,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=843, Invalid=1707, Unknown=0, NotChecked=0, Total=2550 [2018-10-14 16:51:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-10-14 16:51:12,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 401. [2018-10-14 16:51:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2018-10-14 16:51:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 401 transitions. [2018-10-14 16:51:12,144 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 401 transitions. Word has length 377 [2018-10-14 16:51:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:12,145 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 401 transitions. [2018-10-14 16:51:12,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-14 16:51:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 401 transitions. [2018-10-14 16:51:12,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2018-10-14 16:51:12,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:12,148 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:12,148 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:12,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:12,149 INFO L82 PathProgramCache]: Analyzing trace with hash 917761434, now seen corresponding path program 13 times [2018-10-14 16:51:12,150 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 0 proven. 1807 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:14,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:14,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-14 16:51:14,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-14 16:51:14,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-14 16:51:14,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-10-14 16:51:14,056 INFO L87 Difference]: Start difference. First operand 401 states and 401 transitions. Second operand 29 states. [2018-10-14 16:51:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:15,311 INFO L93 Difference]: Finished difference Result 445 states and 445 transitions. [2018-10-14 16:51:15,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-14 16:51:15,312 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 400 [2018-10-14 16:51:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:15,314 INFO L225 Difference]: With dead ends: 445 [2018-10-14 16:51:15,314 INFO L226 Difference]: Without dead ends: 445 [2018-10-14 16:51:15,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2018-10-14 16:51:15,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2018-10-14 16:51:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 424. [2018-10-14 16:51:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-14 16:51:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 424 transitions. [2018-10-14 16:51:15,324 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 424 transitions. Word has length 400 [2018-10-14 16:51:15,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:15,324 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 424 transitions. [2018-10-14 16:51:15,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-14 16:51:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 424 transitions. [2018-10-14 16:51:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-14 16:51:15,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:15,328 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:15,328 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:15,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:15,329 INFO L82 PathProgramCache]: Analyzing trace with hash -538381522, now seen corresponding path program 14 times [2018-10-14 16:51:15,330 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 2107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:17,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:17,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-14 16:51:17,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-14 16:51:17,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-14 16:51:17,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2018-10-14 16:51:17,041 INFO L87 Difference]: Start difference. First operand 424 states and 424 transitions. Second operand 31 states. [2018-10-14 16:51:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:17,789 INFO L93 Difference]: Finished difference Result 468 states and 468 transitions. [2018-10-14 16:51:17,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-14 16:51:17,789 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 423 [2018-10-14 16:51:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:17,791 INFO L225 Difference]: With dead ends: 468 [2018-10-14 16:51:17,791 INFO L226 Difference]: Without dead ends: 468 [2018-10-14 16:51:17,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1123, Invalid=2299, Unknown=0, NotChecked=0, Total=3422 [2018-10-14 16:51:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2018-10-14 16:51:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 447. [2018-10-14 16:51:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-10-14 16:51:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 447 transitions. [2018-10-14 16:51:17,800 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 447 transitions. Word has length 423 [2018-10-14 16:51:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:17,800 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 447 transitions. [2018-10-14 16:51:17,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-14 16:51:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 447 transitions. [2018-10-14 16:51:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2018-10-14 16:51:17,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:17,803 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:17,804 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:17,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:17,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1673848602, now seen corresponding path program 15 times [2018-10-14 16:51:17,805 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2430 backedges. 0 proven. 2430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:18,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:18,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-14 16:51:18,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-14 16:51:18,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-14 16:51:18,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2018-10-14 16:51:18,854 INFO L87 Difference]: Start difference. First operand 447 states and 447 transitions. Second operand 33 states. [2018-10-14 16:51:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:19,533 INFO L93 Difference]: Finished difference Result 491 states and 491 transitions. [2018-10-14 16:51:19,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-14 16:51:19,535 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 446 [2018-10-14 16:51:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:19,538 INFO L225 Difference]: With dead ends: 491 [2018-10-14 16:51:19,538 INFO L226 Difference]: Without dead ends: 491 [2018-10-14 16:51:19,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1278, Invalid=2628, Unknown=0, NotChecked=0, Total=3906 [2018-10-14 16:51:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2018-10-14 16:51:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 470. [2018-10-14 16:51:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2018-10-14 16:51:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 470 transitions. [2018-10-14 16:51:19,547 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 470 transitions. Word has length 446 [2018-10-14 16:51:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:19,548 INFO L481 AbstractCegarLoop]: Abstraction has 470 states and 470 transitions. [2018-10-14 16:51:19,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-14 16:51:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 470 transitions. [2018-10-14 16:51:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2018-10-14 16:51:19,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:19,551 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:19,551 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:19,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:19,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2053682770, now seen corresponding path program 16 times [2018-10-14 16:51:19,552 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 0 proven. 2776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:20,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:20,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-14 16:51:20,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-14 16:51:20,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-14 16:51:20,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2018-10-14 16:51:20,916 INFO L87 Difference]: Start difference. First operand 470 states and 470 transitions. Second operand 35 states. [2018-10-14 16:51:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:21,711 INFO L93 Difference]: Finished difference Result 514 states and 514 transitions. [2018-10-14 16:51:21,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-14 16:51:21,712 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 469 [2018-10-14 16:51:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:21,716 INFO L225 Difference]: With dead ends: 514 [2018-10-14 16:51:21,716 INFO L226 Difference]: Without dead ends: 514 [2018-10-14 16:51:21,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2018-10-14 16:51:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2018-10-14 16:51:21,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 493. [2018-10-14 16:51:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2018-10-14 16:51:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 493 transitions. [2018-10-14 16:51:21,725 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 493 transitions. Word has length 469 [2018-10-14 16:51:21,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:21,726 INFO L481 AbstractCegarLoop]: Abstraction has 493 states and 493 transitions. [2018-10-14 16:51:21,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-14 16:51:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 493 transitions. [2018-10-14 16:51:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2018-10-14 16:51:21,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:21,729 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:21,730 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:21,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:21,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1055047526, now seen corresponding path program 17 times [2018-10-14 16:51:21,731 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 0 proven. 3145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:23,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:23,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-14 16:51:23,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-14 16:51:23,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-14 16:51:23,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2018-10-14 16:51:23,379 INFO L87 Difference]: Start difference. First operand 493 states and 493 transitions. Second operand 37 states. [2018-10-14 16:51:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:24,414 INFO L93 Difference]: Finished difference Result 537 states and 537 transitions. [2018-10-14 16:51:24,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-14 16:51:24,414 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 492 [2018-10-14 16:51:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:24,417 INFO L225 Difference]: With dead ends: 537 [2018-10-14 16:51:24,417 INFO L226 Difference]: Without dead ends: 537 [2018-10-14 16:51:24,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1618, Invalid=3352, Unknown=0, NotChecked=0, Total=4970 [2018-10-14 16:51:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2018-10-14 16:51:24,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 516. [2018-10-14 16:51:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2018-10-14 16:51:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 516 transitions. [2018-10-14 16:51:24,426 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 516 transitions. Word has length 492 [2018-10-14 16:51:24,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:24,426 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 516 transitions. [2018-10-14 16:51:24,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-14 16:51:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 516 transitions. [2018-10-14 16:51:24,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2018-10-14 16:51:24,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:24,430 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:24,430 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:24,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:24,431 INFO L82 PathProgramCache]: Analyzing trace with hash 816988206, now seen corresponding path program 18 times [2018-10-14 16:51:24,431 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3537 backedges. 0 proven. 3537 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:25,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:25,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-14 16:51:25,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-14 16:51:25,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-14 16:51:25,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2018-10-14 16:51:25,235 INFO L87 Difference]: Start difference. First operand 516 states and 516 transitions. Second operand 39 states. [2018-10-14 16:51:26,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:26,430 INFO L93 Difference]: Finished difference Result 560 states and 560 transitions. [2018-10-14 16:51:26,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-14 16:51:26,431 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 515 [2018-10-14 16:51:26,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:26,435 INFO L225 Difference]: With dead ends: 560 [2018-10-14 16:51:26,435 INFO L226 Difference]: Without dead ends: 560 [2018-10-14 16:51:26,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1803, Invalid=3747, Unknown=0, NotChecked=0, Total=5550 [2018-10-14 16:51:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2018-10-14 16:51:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 539. [2018-10-14 16:51:26,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2018-10-14 16:51:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 539 transitions. [2018-10-14 16:51:26,444 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 539 transitions. Word has length 515 [2018-10-14 16:51:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:26,445 INFO L481 AbstractCegarLoop]: Abstraction has 539 states and 539 transitions. [2018-10-14 16:51:26,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-14 16:51:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 539 transitions. [2018-10-14 16:51:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2018-10-14 16:51:26,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:26,448 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:26,449 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:26,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:26,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1194001894, now seen corresponding path program 19 times [2018-10-14 16:51:26,450 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3952 backedges. 0 proven. 3952 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:51:27,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:27,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-14 16:51:27,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-14 16:51:27,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-14 16:51:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2018-10-14 16:51:27,479 INFO L87 Difference]: Start difference. First operand 539 states and 539 transitions. Second operand 41 states. [2018-10-14 16:51:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:28,511 INFO L93 Difference]: Finished difference Result 562 states and 562 transitions. [2018-10-14 16:51:28,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-14 16:51:28,512 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 538 [2018-10-14 16:51:28,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:28,515 INFO L225 Difference]: With dead ends: 562 [2018-10-14 16:51:28,515 INFO L226 Difference]: Without dead ends: 562 [2018-10-14 16:51:28,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2018-10-14 16:51:28,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2018-10-14 16:51:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2018-10-14 16:51:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2018-10-14 16:51:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 562 transitions. [2018-10-14 16:51:28,524 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 562 transitions. Word has length 538 [2018-10-14 16:51:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:28,524 INFO L481 AbstractCegarLoop]: Abstraction has 562 states and 562 transitions. [2018-10-14 16:51:28,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-14 16:51:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 562 transitions. [2018-10-14 16:51:28,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2018-10-14 16:51:28,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:51:28,528 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:51:28,529 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:51:28,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:51:28,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1675503954, now seen corresponding path program 20 times [2018-10-14 16:51:28,530 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:51:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:51:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4390 backedges. 39 proven. 114 refuted. 0 times theorem prover too weak. 4237 trivial. 0 not checked. [2018-10-14 16:51:29,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:51:29,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-14 16:51:29,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-14 16:51:29,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-14 16:51:29,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-14 16:51:29,531 INFO L87 Difference]: Start difference. First operand 562 states and 562 transitions. Second operand 9 states. [2018-10-14 16:51:30,161 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-10-14 16:51:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:51:30,177 INFO L93 Difference]: Finished difference Result 560 states and 560 transitions. [2018-10-14 16:51:30,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-14 16:51:30,178 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 561 [2018-10-14 16:51:30,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:51:30,178 INFO L225 Difference]: With dead ends: 560 [2018-10-14 16:51:30,179 INFO L226 Difference]: Without dead ends: 0 [2018-10-14 16:51:30,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2018-10-14 16:51:30,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-14 16:51:30,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-14 16:51:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-14 16:51:30,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-14 16:51:30,180 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 561 [2018-10-14 16:51:30,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:51:30,180 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-14 16:51:30,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-14 16:51:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-14 16:51:30,181 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-14 16:51:30,186 INFO L202 PluginConnector]: Adding new model optional_data_creation_test04_true-valid-memsafety.i_32.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 04:51:30 BoogieIcfgContainer [2018-10-14 16:51:30,186 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-14 16:51:30,187 INFO L168 Benchmark]: Toolchain (without parser) took 33550.73 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 673.2 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -639.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 7.1 GB. [2018-10-14 16:51:30,188 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-14 16:51:30,189 INFO L168 Benchmark]: Boogie Preprocessor took 66.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-14 16:51:30,190 INFO L168 Benchmark]: RCFGBuilder took 978.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-10-14 16:51:30,191 INFO L168 Benchmark]: TraceAbstraction took 32501.13 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 673.2 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -681.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-14 16:51:30,196 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 978.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 32501.13 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 673.2 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -681.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 226]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 126 locations, 1 error locations. SAFE Result, 32.4s OverallTime, 21 OverallIterations, 20 TraceHistogramMax, 13.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2508 SDtfs, 4666 SDslu, 40235 SDs, 0 SdLazy, 2384 SolverSat, 276 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 835 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 793 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7042 ImplicationChecksByTransitivity, 21.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=562occurred in iteration=20, 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: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 399 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 14.7s InterpolantComputationTime, 6951 NumberOfCodeBlocks, 6951 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 6930 ConstructedInterpolants, 0 QuantifiedInterpolants, 8835190 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 4276/30800 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/optional_data_creation_test04_true-valid-memsafety.i_32.bpl_heapsep-2018-09-18.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-10-14_16-51-30-214.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/optional_data_creation_test04_true-valid-memsafety.i_32.bpl_heapsep-2018-09-18.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-14_16-51-30-214.csv Received shutdown request...