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/alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-502d2f4 [2018-10-12 20:53:59,480 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-12 20:53:59,482 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-12 20:53:59,494 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-12 20:53:59,495 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-12 20:53:59,496 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-12 20:53:59,497 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-12 20:53:59,499 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-12 20:53:59,500 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-12 20:53:59,501 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-12 20:53:59,502 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-12 20:53:59,502 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-12 20:53:59,503 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-12 20:53:59,504 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-12 20:53:59,505 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-12 20:53:59,506 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-12 20:53:59,507 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-12 20:53:59,509 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-12 20:53:59,511 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-12 20:53:59,512 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-12 20:53:59,513 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-12 20:53:59,515 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-12 20:53:59,517 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-12 20:53:59,517 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-12 20:53:59,518 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-12 20:53:59,518 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-12 20:53:59,519 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-12 20:53:59,520 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-12 20:53:59,521 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-12 20:53:59,522 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-12 20:53:59,522 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-12 20:53:59,523 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-12 20:53:59,523 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-12 20:53:59,524 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-12 20:53:59,525 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-12 20:53:59,525 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-12 20:53:59,526 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-12 20:53:59,536 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-12 20:53:59,536 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-12 20:53:59,537 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-12 20:53:59,537 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-12 20:53:59,537 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-12 20:53:59,537 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-12 20:53:59,538 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-12 20:53:59,538 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-12 20:53:59,539 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-12 20:53:59,539 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-12 20:53:59,539 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-12 20:53:59,539 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-12 20:53:59,539 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-12 20:53:59,540 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-12 20:53:59,540 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-12 20:53:59,597 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-12 20:53:59,615 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-12 20:53:59,619 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-12 20:53:59,621 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-12 20:53:59,623 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-12 20:53:59,624 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl [2018-10-12 20:53:59,624 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl' [2018-10-12 20:53:59,700 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-12 20:53:59,702 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-12 20:53:59,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-12 20:53:59,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-12 20:53:59,703 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-12 20:53:59,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:59" (1/1) ... [2018-10-12 20:53:59,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:59" (1/1) ... [2018-10-12 20:53:59,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:59" (1/1) ... [2018-10-12 20:53:59,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:59" (1/1) ... [2018-10-12 20:53:59,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:59" (1/1) ... [2018-10-12 20:53:59,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:59" (1/1) ... [2018-10-12 20:53:59,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:59" (1/1) ... [2018-10-12 20:53:59,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-12 20:53:59,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-12 20:53:59,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-12 20:53:59,809 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-12 20:53:59,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:59" (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 [2018-10-12 20:53:59,881 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-12 20:53:59,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-12 20:53:59,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-12 20:54:00,771 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-12 20:54:00,773 INFO L202 PluginConnector]: Adding new model alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:54:00 BoogieIcfgContainer [2018-10-12 20:54:00,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-12 20:54:00,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-12 20:54:00,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-12 20:54:00,778 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-12 20:54:00,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:59" (1/2) ... [2018-10-12 20:54:00,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10dc8181 and model type alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:54:00, skipping insertion in model container [2018-10-12 20:54:00,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:54:00" (2/2) ... [2018-10-12 20:54:00,781 INFO L112 eAbstractionObserver]: Analyzing ICFG alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl [2018-10-12 20:54:00,791 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-12 20:54:00,800 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-12 20:54:00,817 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-12 20:54:00,846 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-12 20:54:00,847 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-12 20:54:00,847 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-12 20:54:00,847 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-12 20:54:00,847 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-12 20:54:00,848 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-12 20:54:00,848 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-12 20:54:00,848 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-12 20:54:00,848 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-12 20:54:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states. [2018-10-12 20:54:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-12 20:54:00,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:54:00,884 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] [2018-10-12 20:54:00,885 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:54:00,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:54:00,892 INFO L82 PathProgramCache]: Analyzing trace with hash -287333896, now seen corresponding path program 1 times [2018-10-12 20:54:00,955 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:54:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:54:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:54:01,599 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-12 20:54:01,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-10-12 20:54:01,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-12 20:54:01,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-12 20:54:01,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-10-12 20:54:01,624 INFO L87 Difference]: Start difference. First operand 139 states. Second operand 11 states. [2018-10-12 20:54:02,069 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-12 20:54:02,260 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-10-12 20:54:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:54:03,579 INFO L93 Difference]: Finished difference Result 259 states and 264 transitions. [2018-10-12 20:54:03,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-12 20:54:03,582 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 63 [2018-10-12 20:54:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:54:03,597 INFO L225 Difference]: With dead ends: 259 [2018-10-12 20:54:03,597 INFO L226 Difference]: Without dead ends: 163 [2018-10-12 20:54:03,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2018-10-12 20:54:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-12 20:54:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 139. [2018-10-12 20:54:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-12 20:54:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-10-12 20:54:03,654 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 63 [2018-10-12 20:54:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:54:03,654 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-10-12 20:54:03,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-12 20:54:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-10-12 20:54:03,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-12 20:54:03,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:54:03,660 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2018-10-12 20:54:03,660 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:54:03,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:54:03,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1820774244, now seen corresponding path program 1 times [2018-10-12 20:54:03,662 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:54:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:54:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:54:04,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:54:04,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-12 20:54:04,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-12 20:54:04,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-12 20:54:04,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2018-10-12 20:54:04,602 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 27 states. [2018-10-12 20:54:06,906 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2018-10-12 20:54:07,180 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-12 20:54:07,511 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2018-10-12 20:54:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:54:10,455 INFO L93 Difference]: Finished difference Result 363 states and 370 transitions. [2018-10-12 20:54:10,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-12 20:54:10,455 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 106 [2018-10-12 20:54:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:54:10,460 INFO L225 Difference]: With dead ends: 363 [2018-10-12 20:54:10,460 INFO L226 Difference]: Without dead ends: 271 [2018-10-12 20:54:10,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=538, Invalid=3494, Unknown=0, NotChecked=0, Total=4032 [2018-10-12 20:54:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-12 20:54:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 182. [2018-10-12 20:54:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-12 20:54:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 185 transitions. [2018-10-12 20:54:10,478 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 185 transitions. Word has length 106 [2018-10-12 20:54:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:54:10,478 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 185 transitions. [2018-10-12 20:54:10,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-12 20:54:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 185 transitions. [2018-10-12 20:54:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-12 20:54:10,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:54:10,481 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2018-10-12 20:54:10,482 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:54:10,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:54:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1814688900, now seen corresponding path program 1 times [2018-10-12 20:54:10,483 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:54:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:54:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:54:10,542 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-12 20:54:10,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-12 20:54:10,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-12 20:54:10,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-12 20:54:10,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-12 20:54:10,544 INFO L87 Difference]: Start difference. First operand 182 states and 185 transitions. Second operand 3 states. [2018-10-12 20:54:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:54:10,586 INFO L93 Difference]: Finished difference Result 270 states and 273 transitions. [2018-10-12 20:54:10,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-12 20:54:10,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2018-10-12 20:54:10,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:54:10,591 INFO L225 Difference]: With dead ends: 270 [2018-10-12 20:54:10,592 INFO L226 Difference]: Without dead ends: 270 [2018-10-12 20:54:10,593 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 [2018-10-12 20:54:10,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-12 20:54:10,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 216. [2018-10-12 20:54:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-12 20:54:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2018-10-12 20:54:10,618 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 106 [2018-10-12 20:54:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:54:10,619 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2018-10-12 20:54:10,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-12 20:54:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2018-10-12 20:54:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-12 20:54:10,623 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:54:10,624 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-12 20:54:10,624 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:54:10,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:54:10,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1455552120, now seen corresponding path program 2 times [2018-10-12 20:54:10,626 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:54:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:54:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:54:10,788 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-12 20:54:10,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-12 20:54:10,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-12 20:54:10,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-12 20:54:10,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-12 20:54:10,790 INFO L87 Difference]: Start difference. First operand 216 states and 219 transitions. Second operand 3 states. [2018-10-12 20:54:10,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:54:10,829 INFO L93 Difference]: Finished difference Result 260 states and 261 transitions. [2018-10-12 20:54:10,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-12 20:54:10,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2018-10-12 20:54:10,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:54:10,832 INFO L225 Difference]: With dead ends: 260 [2018-10-12 20:54:10,832 INFO L226 Difference]: Without dead ends: 258 [2018-10-12 20:54:10,832 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 [2018-10-12 20:54:10,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-12 20:54:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 225. [2018-10-12 20:54:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-12 20:54:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-10-12 20:54:10,849 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 149 [2018-10-12 20:54:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:54:10,849 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-10-12 20:54:10,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-12 20:54:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-10-12 20:54:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-12 20:54:10,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:54:10,853 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-12 20:54:10,853 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:54:10,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:54:10,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1449466776, now seen corresponding path program 1 times [2018-10-12 20:54:10,854 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:54:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:54:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:54:12,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:54:12,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-12 20:54:12,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-12 20:54:12,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-12 20:54:12,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2018-10-12 20:54:12,708 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 41 states. [2018-10-12 20:54:14,764 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2018-10-12 20:54:14,983 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2018-10-12 20:54:15,355 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2018-10-12 20:54:15,582 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2018-10-12 20:54:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:54:20,876 INFO L93 Difference]: Finished difference Result 402 states and 405 transitions. [2018-10-12 20:54:20,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-12 20:54:20,880 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 149 [2018-10-12 20:54:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:54:20,882 INFO L225 Difference]: With dead ends: 402 [2018-10-12 20:54:20,883 INFO L226 Difference]: Without dead ends: 402 [2018-10-12 20:54:20,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1059, Invalid=7497, Unknown=0, NotChecked=0, Total=8556 [2018-10-12 20:54:20,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2018-10-12 20:54:20,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 288. [2018-10-12 20:54:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-10-12 20:54:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 291 transitions. [2018-10-12 20:54:20,897 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 291 transitions. Word has length 149 [2018-10-12 20:54:20,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:54:20,898 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 291 transitions. [2018-10-12 20:54:20,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-12 20:54:20,898 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 291 transitions. [2018-10-12 20:54:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-12 20:54:20,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:54:20,901 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-12 20:54:20,902 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:54:20,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:54:20,902 INFO L82 PathProgramCache]: Analyzing trace with hash 961014568, now seen corresponding path program 1 times [2018-10-12 20:54:20,904 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:54:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:54:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-12 20:54:21,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:54:21,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-12 20:54:21,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-12 20:54:21,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-12 20:54:21,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-12 20:54:21,219 INFO L87 Difference]: Start difference. First operand 288 states and 291 transitions. Second operand 11 states. [2018-10-12 20:54:21,663 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2018-10-12 20:54:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:54:21,904 INFO L93 Difference]: Finished difference Result 299 states and 301 transitions. [2018-10-12 20:54:21,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-12 20:54:21,905 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 181 [2018-10-12 20:54:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:54:21,908 INFO L225 Difference]: With dead ends: 299 [2018-10-12 20:54:21,908 INFO L226 Difference]: Without dead ends: 236 [2018-10-12 20:54:21,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2018-10-12 20:54:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-10-12 20:54:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-10-12 20:54:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-12 20:54:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2018-10-12 20:54:21,914 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 181 [2018-10-12 20:54:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:54:21,915 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2018-10-12 20:54:21,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-12 20:54:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2018-10-12 20:54:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-12 20:54:21,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:54:21,917 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-12 20:54:21,918 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:54:21,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:54:21,918 INFO L82 PathProgramCache]: Analyzing trace with hash -177106492, now seen corresponding path program 2 times [2018-10-12 20:54:21,919 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:54:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:54:23,845 WARN L178 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-10-12 20:54:24,155 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2018-10-12 20:54:24,634 WARN L178 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2018-10-12 20:54:24,884 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2018-10-12 20:54:25,454 WARN L178 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2018-10-12 20:54:25,788 WARN L178 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2018-10-12 20:54:25,924 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2018-10-12 20:54:26,230 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2018-10-12 20:54:26,406 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2018-10-12 20:54:26,669 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2018-10-12 20:54:27,684 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2018-10-12 20:54:27,909 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2018-10-12 20:54:28,115 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2018-10-12 20:54:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:54:31,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:54:31,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-12 20:54:31,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-12 20:54:31,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-12 20:54:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=3924, Unknown=0, NotChecked=0, Total=4160 [2018-10-12 20:54:31,151 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand 65 states. [2018-10-12 20:54:33,185 WARN L178 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2018-10-12 20:54:33,785 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2018-10-12 20:54:34,096 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2018-10-12 20:54:34,354 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 60 [2018-10-12 20:54:34,622 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 63 [2018-10-12 20:54:34,991 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 72 [2018-10-12 20:54:35,271 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 71 [2018-10-12 20:54:35,756 WARN L178 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 76 [2018-10-12 20:54:36,091 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 82 [2018-10-12 20:54:36,579 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 85 [2018-10-12 20:54:36,905 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 88 [2018-10-12 20:54:37,588 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2018-10-12 20:54:37,941 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 61 [2018-10-12 20:54:38,291 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2018-10-12 20:54:38,559 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 51 [2018-10-12 20:54:38,935 WARN L178 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 54 [2018-10-12 20:54:39,552 WARN L178 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 63 [2018-10-12 20:54:39,991 WARN L178 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 56 [2018-10-12 20:54:40,608 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2018-10-12 20:54:40,883 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2018-10-12 20:54:41,264 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 64 [2018-10-12 20:54:41,619 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 69 [2018-10-12 20:54:41,993 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 74 [2018-10-12 20:54:42,756 WARN L178 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 86 [2018-10-12 20:54:43,260 WARN L178 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 91 [2018-10-12 20:54:43,709 WARN L178 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 97 [2018-10-12 20:54:44,246 WARN L178 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 100 [2018-10-12 20:54:44,731 WARN L178 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 103 [2018-10-12 20:54:45,029 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 69 [2018-10-12 20:54:45,668 WARN L178 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 66 [2018-10-12 20:54:46,058 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 70 [2018-10-12 20:54:46,446 WARN L178 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 82 [2018-10-12 20:54:46,832 WARN L178 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 85 [2018-10-12 20:54:47,282 WARN L178 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 91 [2018-10-12 20:54:47,578 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-12 20:54:47,935 WARN L178 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2018-10-12 20:54:48,335 WARN L178 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2018-10-12 20:54:48,714 WARN L178 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2018-10-12 20:54:49,384 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2018-10-12 20:54:49,586 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2018-10-12 20:54:49,802 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2018-10-12 20:54:50,153 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2018-10-12 20:54:50,426 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2018-10-12 20:54:50,756 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2018-10-12 20:54:51,096 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2018-10-12 20:54:51,467 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2018-10-12 20:54:51,753 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 90 [2018-10-12 20:54:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:54:55,049 INFO L93 Difference]: Finished difference Result 370 states and 372 transitions. [2018-10-12 20:54:55,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-12 20:54:55,051 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 192 [2018-10-12 20:54:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:54:55,054 INFO L225 Difference]: With dead ends: 370 [2018-10-12 20:54:55,055 INFO L226 Difference]: Without dead ends: 339 [2018-10-12 20:54:55,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5473 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=2737, Invalid=19315, Unknown=0, NotChecked=0, Total=22052 [2018-10-12 20:54:55,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-12 20:54:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 279. [2018-10-12 20:54:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-10-12 20:54:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2018-10-12 20:54:55,068 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 192 [2018-10-12 20:54:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:54:55,068 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2018-10-12 20:54:55,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-12 20:54:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2018-10-12 20:54:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-12 20:54:55,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:54:55,071 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-10-12 20:54:55,072 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:54:55,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:54:55,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1606196536, now seen corresponding path program 3 times [2018-10-12 20:54:55,073 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:54:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:55:00,989 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2018-10-12 20:55:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:55:05,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:55:05,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-10-12 20:55:05,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-12 20:55:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-12 20:55:05,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=8368, Unknown=0, NotChecked=0, Total=8742 [2018-10-12 20:55:05,171 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand 94 states. [2018-10-12 20:55:08,733 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2018-10-12 20:55:09,096 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2018-10-12 20:55:09,506 WARN L178 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2018-10-12 20:55:10,162 WARN L178 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 83 [2018-10-12 20:55:10,591 WARN L178 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 80 [2018-10-12 20:55:11,384 WARN L178 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 94 [2018-10-12 20:55:11,928 WARN L178 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 114 [2018-10-12 20:55:12,522 WARN L178 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 113 [2018-10-12 20:55:13,199 WARN L178 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 120 [2018-10-12 20:55:13,799 WARN L178 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 127 [2018-10-12 20:55:14,098 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2018-10-12 20:55:14,296 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2018-10-12 20:55:14,594 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2018-10-12 20:55:14,894 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2018-10-12 20:55:15,203 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2018-10-12 20:55:16,109 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2018-10-12 20:55:16,325 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2018-10-12 20:55:16,582 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2018-10-12 20:55:17,702 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2018-10-12 20:55:18,034 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2018-10-12 20:55:18,409 WARN L178 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2018-10-12 20:55:18,995 WARN L178 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 91 [2018-10-12 20:55:19,555 WARN L178 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 93 [2018-10-12 20:55:20,412 WARN L178 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 106 [2018-10-12 20:55:21,129 WARN L178 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 126 [2018-10-12 20:55:22,034 WARN L178 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 125 [2018-10-12 20:55:22,973 WARN L178 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 132 [2018-10-12 20:55:23,766 WARN L178 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 139 [2018-10-12 20:55:24,112 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2018-10-12 20:55:24,361 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2018-10-12 20:55:24,814 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2018-10-12 20:55:25,164 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2018-10-12 20:55:25,697 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2018-10-12 20:55:26,899 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2018-10-12 20:55:27,186 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2018-10-12 20:55:27,568 WARN L178 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2018-10-12 20:55:28,062 WARN L178 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2018-10-12 20:55:28,594 WARN L178 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2018-10-12 20:55:29,217 WARN L178 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2018-10-12 20:55:29,935 WARN L178 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 121 [2018-10-12 20:55:30,656 WARN L178 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 119 [2018-10-12 20:55:31,477 WARN L178 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 127 [2018-10-12 20:55:32,372 WARN L178 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 134 [2018-10-12 20:55:32,676 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2018-10-12 20:55:32,916 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2018-10-12 20:55:33,334 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2018-10-12 20:55:33,615 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2018-10-12 20:55:33,945 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2018-10-12 20:55:34,338 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2018-10-12 20:55:34,581 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2018-10-12 20:55:34,794 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2018-10-12 20:55:35,550 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2018-10-12 20:55:35,816 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-10-12 20:55:36,153 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2018-10-12 20:55:36,516 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2018-10-12 20:55:37,035 WARN L178 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2018-10-12 20:55:37,433 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 96 [2018-10-12 20:55:37,966 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2018-10-12 20:55:38,376 WARN L178 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2018-10-12 20:55:38,762 WARN L178 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2018-10-12 20:55:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:55:42,544 INFO L93 Difference]: Finished difference Result 413 states and 415 transitions. [2018-10-12 20:55:42,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-12 20:55:42,545 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 235 [2018-10-12 20:55:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:55:42,548 INFO L225 Difference]: With dead ends: 413 [2018-10-12 20:55:42,549 INFO L226 Difference]: Without dead ends: 382 [2018-10-12 20:55:42,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 4 SyntacticMatches, 8 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8850 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=4346, Invalid=34660, Unknown=0, NotChecked=0, Total=39006 [2018-10-12 20:55:42,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2018-10-12 20:55:42,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 322. [2018-10-12 20:55:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-10-12 20:55:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2018-10-12 20:55:42,561 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 235 [2018-10-12 20:55:42,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:55:42,562 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2018-10-12 20:55:42,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-12 20:55:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2018-10-12 20:55:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-12 20:55:42,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:55:42,566 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-12 20:55:42,566 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:55:42,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:55:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash 278219812, now seen corresponding path program 4 times [2018-10-12 20:55:42,567 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:55:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:55:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 333 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-10-12 20:55:46,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:55:46,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-12 20:55:46,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-12 20:55:46,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-12 20:55:46,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=4709, Unknown=0, NotChecked=0, Total=4970 [2018-10-12 20:55:46,728 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 71 states. [2018-10-12 20:55:49,376 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 41 [2018-10-12 20:55:49,685 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 53 [2018-10-12 20:55:50,082 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 62 [2018-10-12 20:55:50,378 WARN L178 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 71 [2018-10-12 20:55:50,793 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 76 [2018-10-12 20:55:51,129 WARN L178 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 81 [2018-10-12 20:55:51,444 WARN L178 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2018-10-12 20:55:51,712 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2018-10-12 20:55:52,040 WARN L178 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2018-10-12 20:55:52,462 WARN L178 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 93 [2018-10-12 20:55:52,815 WARN L178 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 98 [2018-10-12 20:55:54,395 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2018-10-12 20:55:54,703 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-10-12 20:55:55,144 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2018-10-12 20:55:55,436 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2018-10-12 20:55:55,885 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2018-10-12 20:55:56,225 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2018-10-12 20:55:56,652 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2018-10-12 20:55:56,869 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2018-10-12 20:55:57,203 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2018-10-12 20:55:58,001 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2018-10-12 20:55:58,375 WARN L178 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 107 [2018-10-12 20:55:58,671 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2018-10-12 20:55:59,020 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 97 [2018-10-12 20:55:59,444 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 99 [2018-10-12 20:56:00,868 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2018-10-12 20:56:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:56:01,700 INFO L93 Difference]: Finished difference Result 308 states and 309 transitions. [2018-10-12 20:56:01,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-12 20:56:01,701 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-10-12 20:56:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:56:01,702 INFO L225 Difference]: With dead ends: 308 [2018-10-12 20:56:01,702 INFO L226 Difference]: Without dead ends: 0 [2018-10-12 20:56:01,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4486 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=2397, Invalid=17343, Unknown=0, NotChecked=0, Total=19740 [2018-10-12 20:56:01,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-12 20:56:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-12 20:56:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-12 20:56:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-12 20:56:01,704 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 278 [2018-10-12 20:56:01,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:56:01,705 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-12 20:56:01,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-12 20:56:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-12 20:56:01,705 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-12 20:56:01,711 INFO L202 PluginConnector]: Adding new model alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 08:56:01 BoogieIcfgContainer [2018-10-12 20:56:01,711 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-12 20:56:01,712 INFO L168 Benchmark]: Toolchain (without parser) took 122011.40 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 575.7 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -500.6 MB). Peak memory consumption was 75.1 MB. Max. memory is 7.1 GB. [2018-10-12 20:56:01,713 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 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. [2018-10-12 20:56:01,713 INFO L168 Benchmark]: Boogie Preprocessor took 105.09 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. [2018-10-12 20:56:01,714 INFO L168 Benchmark]: RCFGBuilder took 964.85 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. [2018-10-12 20:56:01,714 INFO L168 Benchmark]: TraceAbstraction took 120936.97 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 575.7 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -542.9 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. [2018-10-12 20:56:01,717 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 0.22 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 105.09 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 964.85 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 120936.97 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 575.7 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -542.9 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 242]: 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, 139 locations, 1 error locations. SAFE Result, 120.8s OverallTime, 9 OverallIterations, 6 TraceHistogramMax, 93.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 960 SDtfs, 12802 SDslu, 13581 SDs, 0 SdLazy, 23458 SolverSat, 1068 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 744 GetRequests, 48 SyntacticMatches, 20 SemanticMatches, 676 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21260 ImplicationChecksByTransitivity, 88.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=322occurred in iteration=8, 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: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 434 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 25.7s InterpolantComputationTime, 1459 NumberOfCodeBlocks, 1459 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 1450 ConstructedInterpolants, 0 QuantifiedInterpolants, 4764531 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 140/869 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/alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl_heapsep-2018-09-18.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-10-12_20-56-01-727.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/alternating_list_true-unreach-call_true-valid-memsafety.i_43.bpl_heapsep-2018-09-18.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-12_20-56-01-727.csv Received shutdown request...