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_48.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-093a8c0 [2018-10-14 16:34:39,682 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-14 16:34:39,685 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-14 16:34:39,701 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-14 16:34:39,701 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-14 16:34:39,703 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-14 16:34:39,704 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-14 16:34:39,707 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-14 16:34:39,710 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-14 16:34:39,711 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-14 16:34:39,712 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-14 16:34:39,761 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 16:34:39,779 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-14 16:34:39,780 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-14 16:34:39,781 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-14 16:34:39,782 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-14 16:34:39,782 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-14 16:34:39,782 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-14 16:34:39,783 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-14 16:34:39,783 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-14 16:34:39,783 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-14 16:34:39,783 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-14 16:34:39,783 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-14 16:34:39,784 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-14 16:34:39,784 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-14 16:34:39,785 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-14 16:34:39,785 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-14 16:34:39,824 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-14 16:34:39,838 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-14 16:34:39,843 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-14 16:34:39,845 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-14 16:34:39,845 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-14 16:34:39,846 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl [2018-10-14 16:34:39,847 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl' [2018-10-14 16:34:39,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-14 16:34:39,945 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-14 16:34:39,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-14 16:34:39,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-14 16:34:39,945 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-14 16:34:39,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:34:39" (1/1) ... [2018-10-14 16:34:39,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:34:39" (1/1) ... [2018-10-14 16:34:40,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:34:39" (1/1) ... [2018-10-14 16:34:40,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:34:39" (1/1) ... [2018-10-14 16:34:40,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:34:39" (1/1) ... [2018-10-14 16:34:40,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:34:39" (1/1) ... [2018-10-14 16:34:40,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:34:39" (1/1) ... [2018-10-14 16:34:40,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-14 16:34:40,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-14 16:34:40,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-14 16:34:40,048 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-14 16:34:40,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:34:39" (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 16:34:40,139 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-14 16:34:40,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-14 16:34:40,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-14 16:34:41,003 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-14 16:34:41,004 INFO L202 PluginConnector]: Adding new model alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:34:41 BoogieIcfgContainer [2018-10-14 16:34:41,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-14 16:34:41,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-14 16:34:41,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-14 16:34:41,009 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-14 16:34:41,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:34:39" (1/2) ... [2018-10-14 16:34:41,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48146858 and model type alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:34:41, skipping insertion in model container [2018-10-14 16:34:41,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:34:41" (2/2) ... [2018-10-14 16:34:41,013 INFO L112 eAbstractionObserver]: Analyzing ICFG alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl [2018-10-14 16:34:41,022 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-14 16:34:41,031 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-14 16:34:41,046 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-14 16:34:41,073 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-14 16:34:41,074 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-14 16:34:41,074 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-14 16:34:41,074 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-14 16:34:41,074 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-14 16:34:41,074 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-14 16:34:41,075 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-14 16:34:41,075 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-14 16:34:41,075 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-14 16:34:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2018-10-14 16:34:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-14 16:34:41,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:34:41,111 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] [2018-10-14 16:34:41,112 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:34:41,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:34:41,118 INFO L82 PathProgramCache]: Analyzing trace with hash -35024842, now seen corresponding path program 1 times [2018-10-14 16:34:41,169 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:34:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:34:41,727 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 16:34:41,730 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:34:41,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-10-14 16:34:41,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-14 16:34:41,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-14 16:34:41,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-10-14 16:34:41,758 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 9 states. [2018-10-14 16:34:42,214 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-14 16:34:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:34:43,539 INFO L93 Difference]: Finished difference Result 310 states and 317 transitions. [2018-10-14 16:34:43,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-14 16:34:43,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2018-10-14 16:34:43,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:34:43,558 INFO L225 Difference]: With dead ends: 310 [2018-10-14 16:34:43,558 INFO L226 Difference]: Without dead ends: 310 [2018-10-14 16:34:43,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-10-14 16:34:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2018-10-14 16:34:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 196. [2018-10-14 16:34:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-14 16:34:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 201 transitions. [2018-10-14 16:34:43,622 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 201 transitions. Word has length 48 [2018-10-14 16:34:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:34:43,623 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 201 transitions. [2018-10-14 16:34:43,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-14 16:34:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 201 transitions. [2018-10-14 16:34:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-14 16:34:43,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:34:43,627 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-14 16:34:43,629 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:34:43,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:34:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash 844876254, now seen corresponding path program 1 times [2018-10-14 16:34:43,631 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:34:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:34:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:34:43,846 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:34:43,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-10-14 16:34:43,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-14 16:34:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-14 16:34:43,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-14 16:34:43,849 INFO L87 Difference]: Start difference. First operand 196 states and 201 transitions. Second operand 11 states. [2018-10-14 16:34:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:34:45,041 INFO L93 Difference]: Finished difference Result 376 states and 383 transitions. [2018-10-14 16:34:45,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-14 16:34:45,044 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2018-10-14 16:34:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:34:45,048 INFO L225 Difference]: With dead ends: 376 [2018-10-14 16:34:45,048 INFO L226 Difference]: Without dead ends: 365 [2018-10-14 16:34:45,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-10-14 16:34:45,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-10-14 16:34:45,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 219. [2018-10-14 16:34:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-14 16:34:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 225 transitions. [2018-10-14 16:34:45,070 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 225 transitions. Word has length 75 [2018-10-14 16:34:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:34:45,071 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 225 transitions. [2018-10-14 16:34:45,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-14 16:34:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 225 transitions. [2018-10-14 16:34:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-14 16:34:45,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:34:45,075 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] [2018-10-14 16:34:45,076 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:34:45,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:34:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1361626762, now seen corresponding path program 1 times [2018-10-14 16:34:45,077 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:34:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:34:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:34:45,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:34:45,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-14 16:34:45,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-14 16:34:45,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-14 16:34:45,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-10-14 16:34:45,443 INFO L87 Difference]: Start difference. First operand 219 states and 225 transitions. Second operand 11 states. [2018-10-14 16:34:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:34:46,587 INFO L93 Difference]: Finished difference Result 515 states and 525 transitions. [2018-10-14 16:34:46,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-14 16:34:46,589 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 91 [2018-10-14 16:34:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:34:46,593 INFO L225 Difference]: With dead ends: 515 [2018-10-14 16:34:46,593 INFO L226 Difference]: Without dead ends: 510 [2018-10-14 16:34:46,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2018-10-14 16:34:46,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2018-10-14 16:34:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 237. [2018-10-14 16:34:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-10-14 16:34:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 244 transitions. [2018-10-14 16:34:46,613 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 244 transitions. Word has length 91 [2018-10-14 16:34:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:34:46,614 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 244 transitions. [2018-10-14 16:34:46,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-14 16:34:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 244 transitions. [2018-10-14 16:34:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-14 16:34:46,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:34:46,617 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-14 16:34:46,617 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:34:46,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:34:46,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1091503726, now seen corresponding path program 1 times [2018-10-14 16:34:46,619 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:34:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:34:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-14 16:34:46,810 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:34:46,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-10-14 16:34:46,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-14 16:34:46,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-14 16:34:46,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-14 16:34:46,812 INFO L87 Difference]: Start difference. First operand 237 states and 244 transitions. Second operand 9 states. [2018-10-14 16:34:47,229 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2018-10-14 16:34:47,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:34:47,653 INFO L93 Difference]: Finished difference Result 366 states and 373 transitions. [2018-10-14 16:34:47,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-14 16:34:47,659 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 107 [2018-10-14 16:34:47,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:34:47,662 INFO L225 Difference]: With dead ends: 366 [2018-10-14 16:34:47,662 INFO L226 Difference]: Without dead ends: 334 [2018-10-14 16:34:47,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2018-10-14 16:34:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2018-10-14 16:34:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 237. [2018-10-14 16:34:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-10-14 16:34:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 243 transitions. [2018-10-14 16:34:47,685 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 243 transitions. Word has length 107 [2018-10-14 16:34:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:34:47,685 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 243 transitions. [2018-10-14 16:34:47,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-14 16:34:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 243 transitions. [2018-10-14 16:34:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-14 16:34:47,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:34:47,689 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] [2018-10-14 16:34:47,689 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:34:47,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:34:47,689 INFO L82 PathProgramCache]: Analyzing trace with hash -531209290, now seen corresponding path program 2 times [2018-10-14 16:34:47,690 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:34:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:34:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:34:47,816 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:34:47,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-14 16:34:47,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-14 16:34:47,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-14 16:34:47,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-14 16:34:47,817 INFO L87 Difference]: Start difference. First operand 237 states and 243 transitions. Second operand 3 states. [2018-10-14 16:34:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:34:47,844 INFO L93 Difference]: Finished difference Result 329 states and 335 transitions. [2018-10-14 16:34:47,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-14 16:34:47,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2018-10-14 16:34:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:34:47,848 INFO L225 Difference]: With dead ends: 329 [2018-10-14 16:34:47,848 INFO L226 Difference]: Without dead ends: 327 [2018-10-14 16:34:47,849 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 16:34:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-14 16:34:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 303. [2018-10-14 16:34:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-10-14 16:34:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 310 transitions. [2018-10-14 16:34:47,858 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 310 transitions. Word has length 134 [2018-10-14 16:34:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:34:47,858 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 310 transitions. [2018-10-14 16:34:47,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-14 16:34:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 310 transitions. [2018-10-14 16:34:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-14 16:34:47,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:34:47,862 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] [2018-10-14 16:34:47,862 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:34:47,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:34:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash 850502294, now seen corresponding path program 1 times [2018-10-14 16:34:47,863 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:34:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:34:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-14 16:34:48,317 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:34:48,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-10-14 16:34:48,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-14 16:34:48,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-14 16:34:48,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-10-14 16:34:48,318 INFO L87 Difference]: Start difference. First operand 303 states and 310 transitions. Second operand 11 states. [2018-10-14 16:34:48,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:34:48,911 INFO L93 Difference]: Finished difference Result 328 states and 334 transitions. [2018-10-14 16:34:48,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-14 16:34:48,914 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 134 [2018-10-14 16:34:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:34:48,917 INFO L225 Difference]: With dead ends: 328 [2018-10-14 16:34:48,917 INFO L226 Difference]: Without dead ends: 323 [2018-10-14 16:34:48,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2018-10-14 16:34:48,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-14 16:34:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 194. [2018-10-14 16:34:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-14 16:34:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 197 transitions. [2018-10-14 16:34:48,924 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 197 transitions. Word has length 134 [2018-10-14 16:34:48,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:34:48,924 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 197 transitions. [2018-10-14 16:34:48,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-14 16:34:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 197 transitions. [2018-10-14 16:34:48,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-14 16:34:48,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:34:48,929 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 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 16:34:48,929 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:34:48,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:34:48,933 INFO L82 PathProgramCache]: Analyzing trace with hash -527119462, now seen corresponding path program 1 times [2018-10-14 16:34:48,935 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:34:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:34:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:34:50,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:34:50,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-14 16:34:50,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-14 16:34:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-14 16:34:50,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2018-10-14 16:34:50,487 INFO L87 Difference]: Start difference. First operand 194 states and 197 transitions. Second operand 29 states. [2018-10-14 16:34:52,190 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2018-10-14 16:34:52,453 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2018-10-14 16:34:52,685 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2018-10-14 16:34:52,972 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2018-10-14 16:34:53,243 WARN L179 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2018-10-14 16:34:53,540 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2018-10-14 16:34:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:34:56,452 INFO L93 Difference]: Finished difference Result 469 states and 476 transitions. [2018-10-14 16:34:56,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-14 16:34:56,455 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 150 [2018-10-14 16:34:56,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:34:56,457 INFO L225 Difference]: With dead ends: 469 [2018-10-14 16:34:56,457 INFO L226 Difference]: Without dead ends: 469 [2018-10-14 16:34:56,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=552, Invalid=3230, Unknown=0, NotChecked=0, Total=3782 [2018-10-14 16:34:56,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2018-10-14 16:34:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 359. [2018-10-14 16:34:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-10-14 16:34:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 365 transitions. [2018-10-14 16:34:56,467 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 365 transitions. Word has length 150 [2018-10-14 16:34:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:34:56,468 INFO L481 AbstractCegarLoop]: Abstraction has 359 states and 365 transitions. [2018-10-14 16:34:56,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-14 16:34:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 365 transitions. [2018-10-14 16:34:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-14 16:34:56,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:34:56,471 INFO L375 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:34:56,471 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:34:56,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:34:56,472 INFO L82 PathProgramCache]: Analyzing trace with hash 992645114, now seen corresponding path program 2 times [2018-10-14 16:34:56,472 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:34:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:34:57,166 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-14 16:34:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:34:57,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:34:57,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-14 16:34:57,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-14 16:34:57,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-14 16:34:57,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2018-10-14 16:34:57,928 INFO L87 Difference]: Start difference. First operand 359 states and 365 transitions. Second operand 31 states. [2018-10-14 16:35:00,547 WARN L179 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2018-10-14 16:35:00,938 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2018-10-14 16:35:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:35:02,886 INFO L93 Difference]: Finished difference Result 458 states and 464 transitions. [2018-10-14 16:35:02,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-14 16:35:02,887 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 177 [2018-10-14 16:35:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:35:02,890 INFO L225 Difference]: With dead ends: 458 [2018-10-14 16:35:02,890 INFO L226 Difference]: Without dead ends: 355 [2018-10-14 16:35:02,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=802, Invalid=3890, Unknown=0, NotChecked=0, Total=4692 [2018-10-14 16:35:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-10-14 16:35:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 278. [2018-10-14 16:35:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-10-14 16:35:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 282 transitions. [2018-10-14 16:35:02,898 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 282 transitions. Word has length 177 [2018-10-14 16:35:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:35:02,899 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 282 transitions. [2018-10-14 16:35:02,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-14 16:35:02,899 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 282 transitions. [2018-10-14 16:35:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-14 16:35:02,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:35:02,901 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, 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, 1, 1, 1, 1, 1] [2018-10-14 16:35:02,902 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:35:02,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:35:02,902 INFO L82 PathProgramCache]: Analyzing trace with hash -184551410, now seen corresponding path program 1 times [2018-10-14 16:35:02,903 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:35:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:35:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-14 16:35:05,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:35:05,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-14 16:35:05,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-14 16:35:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-14 16:35:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1875, Unknown=0, NotChecked=0, Total=1980 [2018-10-14 16:35:05,497 INFO L87 Difference]: Start difference. First operand 278 states and 282 transitions. Second operand 45 states. [2018-10-14 16:35:07,686 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2018-10-14 16:35:08,268 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2018-10-14 16:35:08,571 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2018-10-14 16:35:08,780 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2018-10-14 16:35:09,651 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2018-10-14 16:35:10,644 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2018-10-14 16:35:10,999 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2018-10-14 16:35:11,284 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2018-10-14 16:35:11,855 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2018-10-14 16:35:12,206 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2018-10-14 16:35:12,610 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2018-10-14 16:35:12,980 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2018-10-14 16:35:13,185 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2018-10-14 16:35:13,357 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2018-10-14 16:35:13,574 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2018-10-14 16:35:13,818 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2018-10-14 16:35:14,359 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 85 [2018-10-14 16:35:14,591 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2018-10-14 16:35:14,959 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 93 [2018-10-14 16:35:15,869 WARN L179 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2018-10-14 16:35:16,158 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2018-10-14 16:35:16,607 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2018-10-14 16:35:16,807 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2018-10-14 16:35:19,063 WARN L179 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2018-10-14 16:35:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:35:22,519 INFO L93 Difference]: Finished difference Result 499 states and 506 transitions. [2018-10-14 16:35:22,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-14 16:35:22,521 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 193 [2018-10-14 16:35:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:35:22,524 INFO L225 Difference]: With dead ends: 499 [2018-10-14 16:35:22,525 INFO L226 Difference]: Without dead ends: 447 [2018-10-14 16:35:22,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4078 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1425, Invalid=15867, Unknown=0, NotChecked=0, Total=17292 [2018-10-14 16:35:22,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-10-14 16:35:22,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 364. [2018-10-14 16:35:22,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-14 16:35:22,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 369 transitions. [2018-10-14 16:35:22,538 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 369 transitions. Word has length 193 [2018-10-14 16:35:22,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:35:22,538 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 369 transitions. [2018-10-14 16:35:22,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-14 16:35:22,538 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 369 transitions. [2018-10-14 16:35:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-14 16:35:22,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:35:22,542 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, 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] [2018-10-14 16:35:22,543 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:35:22,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:35:22,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2040075770, now seen corresponding path program 2 times [2018-10-14 16:35:22,544 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:35:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:35:25,016 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-10-14 16:35:25,177 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-10-14 16:35:25,337 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-10-14 16:35:25,517 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-10-14 16:35:25,769 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2018-10-14 16:35:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:35:28,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:35:28,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-14 16:35:28,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-14 16:35:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-14 16:35:28,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=3860, Unknown=0, NotChecked=0, Total=4032 [2018-10-14 16:35:28,820 INFO L87 Difference]: Start difference. First operand 364 states and 369 transitions. Second operand 64 states. [2018-10-14 16:35:29,745 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 35 [2018-10-14 16:35:30,611 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 41 [2018-10-14 16:35:30,988 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 42 [2018-10-14 16:35:31,370 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 35 [2018-10-14 16:35:31,701 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 22 [2018-10-14 16:35:31,934 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 25 [2018-10-14 16:35:32,179 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 28 [2018-10-14 16:35:32,458 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 30 [2018-10-14 16:35:32,827 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 35 [2018-10-14 16:35:33,245 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 42 [2018-10-14 16:35:33,709 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 49 [2018-10-14 16:35:34,266 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 63 [2018-10-14 16:35:34,450 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2018-10-14 16:35:34,829 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 65 [2018-10-14 16:35:35,134 WARN L179 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2018-10-14 16:35:35,739 WARN L179 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 76 [2018-10-14 16:35:35,978 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2018-10-14 16:35:36,432 WARN L179 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 82 [2018-10-14 16:35:36,702 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2018-10-14 16:35:37,392 WARN L179 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 86 [2018-10-14 16:35:37,701 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2018-10-14 16:35:38,345 WARN L179 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 90 [2018-10-14 16:35:38,718 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 88 [2018-10-14 16:35:39,292 WARN L179 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 113 [2018-10-14 16:35:39,558 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2018-10-14 16:35:40,056 WARN L179 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 109 [2018-10-14 16:35:40,278 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2018-10-14 16:35:40,820 WARN L179 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 113 [2018-10-14 16:35:41,356 WARN L179 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 106 [2018-10-14 16:35:42,006 WARN L179 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 117 [2018-10-14 16:35:42,286 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2018-10-14 16:35:42,796 WARN L179 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 110 [2018-10-14 16:35:43,395 WARN L179 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 119 [2018-10-14 16:35:43,743 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2018-10-14 16:35:44,267 WARN L179 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 112 [2018-10-14 16:35:44,815 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2018-10-14 16:35:45,150 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2018-10-14 16:35:45,451 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2018-10-14 16:35:45,669 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2018-10-14 16:35:46,100 WARN L179 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 93 [2018-10-14 16:35:46,364 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2018-10-14 16:35:46,577 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2018-10-14 16:35:46,743 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2018-10-14 16:35:47,041 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2018-10-14 16:35:47,315 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2018-10-14 16:35:47,601 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2018-10-14 16:35:48,058 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2018-10-14 16:35:48,455 WARN L179 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2018-10-14 16:35:48,975 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2018-10-14 16:35:49,263 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2018-10-14 16:35:49,641 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 97 [2018-10-14 16:35:50,033 WARN L179 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 91 [2018-10-14 16:35:50,451 WARN L179 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 95 [2018-10-14 16:35:50,853 WARN L179 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2018-10-14 16:35:51,070 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2018-10-14 16:35:51,251 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2018-10-14 16:35:51,449 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2018-10-14 16:35:51,920 WARN L179 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 112 [2018-10-14 16:35:52,707 WARN L179 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 111 [2018-10-14 16:35:53,207 WARN L179 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 111 [2018-10-14 16:35:53,784 WARN L179 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 117 [2018-10-14 16:35:54,243 WARN L179 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 105 [2018-10-14 16:35:54,873 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-10-14 16:35:55,146 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2018-10-14 16:35:55,384 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2018-10-14 16:35:56,649 WARN L179 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 119 [2018-10-14 16:35:58,207 WARN L179 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 107 [2018-10-14 16:35:58,927 WARN L179 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 95 [2018-10-14 16:35:59,472 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 59 [2018-10-14 16:36:00,075 WARN L179 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 76 [2018-10-14 16:36:00,567 WARN L179 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 115 [2018-10-14 16:36:00,965 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 59 [2018-10-14 16:36:01,356 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 61 [2018-10-14 16:36:01,868 WARN L179 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 108 [2018-10-14 16:36:02,565 WARN L179 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 120 [2018-10-14 16:36:02,758 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2018-10-14 16:36:03,409 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 83 [2018-10-14 16:36:03,826 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 85 [2018-10-14 16:36:04,594 WARN L179 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 89 [2018-10-14 16:36:05,292 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2018-10-14 16:36:05,853 WARN L179 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 93 [2018-10-14 16:36:06,305 WARN L179 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 98 [2018-10-14 16:36:06,672 WARN L179 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 90 [2018-10-14 16:36:06,960 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 85 [2018-10-14 16:36:07,311 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2018-10-14 16:36:07,684 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2018-10-14 16:36:08,153 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2018-10-14 16:36:08,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:08,843 INFO L93 Difference]: Finished difference Result 592 states and 599 transitions. [2018-10-14 16:36:08,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-14 16:36:08,844 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 236 [2018-10-14 16:36:08,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:08,847 INFO L225 Difference]: With dead ends: 592 [2018-10-14 16:36:08,847 INFO L226 Difference]: Without dead ends: 592 [2018-10-14 16:36:08,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8814 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=3197, Invalid=28309, Unknown=0, NotChecked=0, Total=31506 [2018-10-14 16:36:08,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2018-10-14 16:36:08,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 488. [2018-10-14 16:36:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2018-10-14 16:36:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 495 transitions. [2018-10-14 16:36:08,864 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 495 transitions. Word has length 236 [2018-10-14 16:36:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:08,865 INFO L481 AbstractCegarLoop]: Abstraction has 488 states and 495 transitions. [2018-10-14 16:36:08,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-14 16:36:08,865 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 495 transitions. [2018-10-14 16:36:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-14 16:36:08,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:08,868 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, 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] [2018-10-14 16:36:08,869 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:08,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:08,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1626409754, now seen corresponding path program 3 times [2018-10-14 16:36:08,870 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-10-14 16:36:08,990 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:36:08,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-14 16:36:08,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-14 16:36:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-14 16:36:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-14 16:36:08,991 INFO L87 Difference]: Start difference. First operand 488 states and 495 transitions. Second operand 3 states. [2018-10-14 16:36:09,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:09,094 INFO L93 Difference]: Finished difference Result 415 states and 418 transitions. [2018-10-14 16:36:09,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-14 16:36:09,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 236 [2018-10-14 16:36:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:09,096 INFO L225 Difference]: With dead ends: 415 [2018-10-14 16:36:09,097 INFO L226 Difference]: Without dead ends: 415 [2018-10-14 16:36:09,097 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 16:36:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-10-14 16:36:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 404. [2018-10-14 16:36:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2018-10-14 16:36:09,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 407 transitions. [2018-10-14 16:36:09,106 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 407 transitions. Word has length 236 [2018-10-14 16:36:09,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:09,106 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 407 transitions. [2018-10-14 16:36:09,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-14 16:36:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 407 transitions. [2018-10-14 16:36:09,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-14 16:36:09,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:09,110 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, 3, 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, 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] [2018-10-14 16:36:09,110 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:09,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:09,111 INFO L82 PathProgramCache]: Analyzing trace with hash -634730086, now seen corresponding path program 4 times [2018-10-14 16:36:09,112 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 11 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:36:11,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:11,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-14 16:36:11,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-14 16:36:11,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-14 16:36:11,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2018-10-14 16:36:11,719 INFO L87 Difference]: Start difference. First operand 404 states and 407 transitions. Second operand 57 states. [2018-10-14 16:36:13,976 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 56 [2018-10-14 16:36:14,271 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 60 [2018-10-14 16:36:14,646 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 66 [2018-10-14 16:36:14,903 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 71 [2018-10-14 16:36:15,147 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2018-10-14 16:36:15,346 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2018-10-14 16:36:15,586 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2018-10-14 16:36:15,866 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2018-10-14 16:36:17,691 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2018-10-14 16:36:18,573 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2018-10-14 16:36:18,767 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2018-10-14 16:36:19,682 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2018-10-14 16:36:19,874 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2018-10-14 16:36:20,074 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2018-10-14 16:36:20,263 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2018-10-14 16:36:20,511 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2018-10-14 16:36:21,214 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2018-10-14 16:36:23,210 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2018-10-14 16:36:23,416 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2018-10-14 16:36:23,665 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2018-10-14 16:36:24,056 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2018-10-14 16:36:24,404 WARN L179 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2018-10-14 16:36:24,738 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 87 [2018-10-14 16:36:25,002 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 85 [2018-10-14 16:36:25,229 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2018-10-14 16:36:25,443 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2018-10-14 16:36:25,674 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2018-10-14 16:36:26,316 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2018-10-14 16:36:27,588 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2018-10-14 16:36:28,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:36:28,488 INFO L93 Difference]: Finished difference Result 479 states and 481 transitions. [2018-10-14 16:36:28,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-14 16:36:28,488 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 263 [2018-10-14 16:36:28,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:36:28,491 INFO L225 Difference]: With dead ends: 479 [2018-10-14 16:36:28,491 INFO L226 Difference]: Without dead ends: 376 [2018-10-14 16:36:28,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4614 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1931, Invalid=17251, Unknown=0, NotChecked=0, Total=19182 [2018-10-14 16:36:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-10-14 16:36:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 323. [2018-10-14 16:36:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-10-14 16:36:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 325 transitions. [2018-10-14 16:36:28,499 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 325 transitions. Word has length 263 [2018-10-14 16:36:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:36:28,499 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 325 transitions. [2018-10-14 16:36:28,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-14 16:36:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 325 transitions. [2018-10-14 16:36:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-14 16:36:28,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:36:28,501 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, 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] [2018-10-14 16:36:28,502 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:36:28,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:36:28,502 INFO L82 PathProgramCache]: Analyzing trace with hash -795283026, now seen corresponding path program 5 times [2018-10-14 16:36:28,503 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:36:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:36:29,061 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-10-14 16:36:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-14 16:36:38,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:36:38,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-10-14 16:36:38,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-14 16:36:38,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-14 16:36:38,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6558, Unknown=0, NotChecked=0, Total=6806 [2018-10-14 16:36:38,280 INFO L87 Difference]: Start difference. First operand 323 states and 325 transitions. Second operand 83 states. [2018-10-14 16:36:41,426 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 52 [2018-10-14 16:36:42,044 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 64 [2018-10-14 16:36:42,417 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 70 [2018-10-14 16:36:43,042 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 76 [2018-10-14 16:36:43,481 WARN L179 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 80 [2018-10-14 16:36:43,753 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2018-10-14 16:36:44,326 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2018-10-14 16:36:44,998 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 62 [2018-10-14 16:36:45,260 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 62 [2018-10-14 16:36:45,577 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 67 [2018-10-14 16:36:45,834 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 62 [2018-10-14 16:36:46,482 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2018-10-14 16:36:46,705 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2018-10-14 16:36:47,120 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2018-10-14 16:36:47,450 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 88 [2018-10-14 16:36:47,871 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 100 [2018-10-14 16:36:48,339 WARN L179 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 115 [2018-10-14 16:36:48,847 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 75 [2018-10-14 16:36:49,296 WARN L179 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 97 [2018-10-14 16:36:49,882 WARN L179 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 112 [2018-10-14 16:36:50,585 WARN L179 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 106 [2018-10-14 16:36:51,187 WARN L179 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 117 [2018-10-14 16:36:51,867 WARN L179 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 128 [2018-10-14 16:36:52,282 WARN L179 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 106 [2018-10-14 16:36:52,582 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2018-10-14 16:36:53,000 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2018-10-14 16:36:53,380 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 105 [2018-10-14 16:36:54,364 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2018-10-14 16:36:54,975 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2018-10-14 16:36:55,316 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2018-10-14 16:36:55,540 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2018-10-14 16:36:55,996 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2018-10-14 16:36:56,319 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2018-10-14 16:36:56,732 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2018-10-14 16:36:57,155 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 113 [2018-10-14 16:36:57,839 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2018-10-14 16:36:58,114 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2018-10-14 16:36:58,471 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 98 [2018-10-14 16:36:58,796 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 106 [2018-10-14 16:36:59,312 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2018-10-14 16:36:59,624 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2018-10-14 16:36:59,920 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2018-10-14 16:37:01,170 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2018-10-14 16:37:01,407 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2018-10-14 16:37:01,677 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2018-10-14 16:37:01,906 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2018-10-14 16:37:02,303 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2018-10-14 16:37:02,607 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2018-10-14 16:37:02,994 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2018-10-14 16:37:03,404 WARN L179 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 115 [2018-10-14 16:37:04,062 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2018-10-14 16:37:04,320 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2018-10-14 16:37:04,691 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2018-10-14 16:37:05,014 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 102 [2018-10-14 16:37:08,007 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2018-10-14 16:37:08,562 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2018-10-14 16:37:08,935 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2018-10-14 16:37:09,421 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2018-10-14 16:37:09,938 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2018-10-14 16:37:10,198 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2018-10-14 16:37:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:37:12,289 INFO L93 Difference]: Finished difference Result 471 states and 473 transitions. [2018-10-14 16:37:12,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-14 16:37:12,289 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 279 [2018-10-14 16:37:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:37:12,292 INFO L225 Difference]: With dead ends: 471 [2018-10-14 16:37:12,292 INFO L226 Difference]: Without dead ends: 419 [2018-10-14 16:37:12,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 2 SyntacticMatches, 7 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8675 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=2190, Invalid=33720, Unknown=0, NotChecked=0, Total=35910 [2018-10-14 16:37:12,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-10-14 16:37:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 366. [2018-10-14 16:37:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2018-10-14 16:37:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 368 transitions. [2018-10-14 16:37:12,302 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 368 transitions. Word has length 279 [2018-10-14 16:37:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:37:12,302 INFO L481 AbstractCegarLoop]: Abstraction has 366 states and 368 transitions. [2018-10-14 16:37:12,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-14 16:37:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 368 transitions. [2018-10-14 16:37:12,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-10-14 16:37:12,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:37:12,304 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, 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] [2018-10-14 16:37:12,305 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:37:12,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:37:12,305 INFO L82 PathProgramCache]: Analyzing trace with hash 356538458, now seen corresponding path program 6 times [2018-10-14 16:37:12,306 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:37:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:37:15,887 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-10-14 16:37:16,062 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2018-10-14 16:37:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 393 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-14 16:37:26,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:37:26,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-10-14 16:37:26,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-14 16:37:26,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-14 16:37:26,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=9149, Unknown=0, NotChecked=0, Total=9506 [2018-10-14 16:37:26,078 INFO L87 Difference]: Start difference. First operand 366 states and 368 transitions. Second operand 98 states. [2018-10-14 16:37:28,169 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 42 [2018-10-14 16:37:29,959 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 44 [2018-10-14 16:37:30,324 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 52 [2018-10-14 16:37:30,919 WARN L179 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 68 [2018-10-14 16:37:31,398 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 69 [2018-10-14 16:37:32,128 WARN L179 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 81 [2018-10-14 16:37:32,780 WARN L179 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 88 [2018-10-14 16:37:33,682 WARN L179 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 94 [2018-10-14 16:37:34,409 WARN L179 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 98 [2018-10-14 16:37:35,127 WARN L179 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 106 [2018-10-14 16:37:35,734 WARN L179 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 103 [2018-10-14 16:37:36,579 WARN L179 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 106 [2018-10-14 16:37:37,263 WARN L179 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 105 [2018-10-14 16:37:37,944 WARN L179 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 82 [2018-10-14 16:37:38,586 WARN L179 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 96 [2018-10-14 16:37:39,148 WARN L179 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 86 [2018-10-14 16:37:39,686 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2018-10-14 16:37:40,045 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2018-10-14 16:37:40,342 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2018-10-14 16:37:40,861 WARN L179 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2018-10-14 16:37:41,455 WARN L179 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 89 [2018-10-14 16:37:42,054 WARN L179 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 99 [2018-10-14 16:37:42,791 WARN L179 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 116 [2018-10-14 16:37:43,595 WARN L179 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 132 [2018-10-14 16:37:44,430 WARN L179 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 136 [2018-10-14 16:37:45,018 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2018-10-14 16:37:45,634 WARN L179 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 111 [2018-10-14 16:37:46,507 WARN L179 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 138 [2018-10-14 16:37:47,318 WARN L179 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 125 [2018-10-14 16:37:48,245 WARN L179 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 133 [2018-10-14 16:37:49,139 WARN L179 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 144 [2018-10-14 16:37:49,602 WARN L179 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2018-10-14 16:37:49,951 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2018-10-14 16:37:50,507 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2018-10-14 16:37:50,947 WARN L179 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2018-10-14 16:37:51,788 WARN L179 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 96 [2018-10-14 16:37:52,454 WARN L179 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 106 [2018-10-14 16:37:52,970 WARN L179 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 94 [2018-10-14 16:37:53,581 WARN L179 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 92 [2018-10-14 16:37:54,217 WARN L179 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 96 [2018-10-14 16:37:54,652 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2018-10-14 16:37:55,009 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 90 [2018-10-14 16:37:55,338 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2018-10-14 16:37:56,261 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2018-10-14 16:37:56,620 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2018-10-14 16:37:56,989 WARN L179 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2018-10-14 16:37:57,441 WARN L179 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 101 [2018-10-14 16:37:57,959 WARN L179 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 115 [2018-10-14 16:37:58,480 WARN L179 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 118 [2018-10-14 16:37:58,777 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2018-10-14 16:37:59,185 WARN L179 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2018-10-14 16:37:59,696 WARN L179 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 119 [2018-10-14 16:38:00,179 WARN L179 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 112 [2018-10-14 16:38:00,711 WARN L179 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 120 [2018-10-14 16:38:01,274 WARN L179 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 128 [2018-10-14 16:38:01,588 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2018-10-14 16:38:01,871 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2018-10-14 16:38:02,171 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2018-10-14 16:38:03,108 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2018-10-14 16:38:03,363 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2018-10-14 16:38:04,139 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 68 [2018-10-14 16:38:04,852 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 59 [2018-10-14 16:38:05,386 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 43 [2018-10-14 16:38:05,744 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 48 [2018-10-14 16:38:06,348 WARN L179 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 93 [2018-10-14 16:38:07,246 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2018-10-14 16:38:08,379 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2018-10-14 16:38:08,898 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 86 [2018-10-14 16:38:09,301 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2018-10-14 16:38:09,627 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2018-10-14 16:38:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:38:11,634 INFO L93 Difference]: Finished difference Result 429 states and 431 transitions. [2018-10-14 16:38:11,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-14 16:38:11,635 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 322 [2018-10-14 16:38:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:38:11,638 INFO L225 Difference]: With dead ends: 429 [2018-10-14 16:38:11,638 INFO L226 Difference]: Without dead ends: 429 [2018-10-14 16:38:11,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 8 SyntacticMatches, 13 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7724 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=3245, Invalid=32665, Unknown=0, NotChecked=0, Total=35910 [2018-10-14 16:38:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2018-10-14 16:38:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 393. [2018-10-14 16:38:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-10-14 16:38:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 395 transitions. [2018-10-14 16:38:11,645 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 395 transitions. Word has length 322 [2018-10-14 16:38:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:38:11,646 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 395 transitions. [2018-10-14 16:38:11,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-14 16:38:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 395 transitions. [2018-10-14 16:38:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-10-14 16:38:11,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:38:11,648 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, 3, 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, 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] [2018-10-14 16:38:11,649 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:38:11,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:38:11,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1617759034, now seen corresponding path program 7 times [2018-10-14 16:38:11,650 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:38:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:38:12,440 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-14 16:38:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 24 proven. 138 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2018-10-14 16:38:13,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:38:13,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-14 16:38:13,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-14 16:38:13,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-14 16:38:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2018-10-14 16:38:13,069 INFO L87 Difference]: Start difference. First operand 393 states and 395 transitions. Second operand 24 states. [2018-10-14 16:38:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:38:15,286 INFO L93 Difference]: Finished difference Result 370 states and 371 transitions. [2018-10-14 16:38:15,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-14 16:38:15,286 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 349 [2018-10-14 16:38:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:38:15,288 INFO L225 Difference]: With dead ends: 370 [2018-10-14 16:38:15,288 INFO L226 Difference]: Without dead ends: 0 [2018-10-14 16:38:15,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=592, Invalid=2378, Unknown=0, NotChecked=0, Total=2970 [2018-10-14 16:38:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-14 16:38:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-14 16:38:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-14 16:38:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-14 16:38:15,290 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 349 [2018-10-14 16:38:15,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:38:15,290 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-14 16:38:15,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-14 16:38:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-14 16:38:15,291 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-14 16:38:15,296 INFO L202 PluginConnector]: Adding new model alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 04:38:15 BoogieIcfgContainer [2018-10-14 16:38:15,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-14 16:38:15,298 INFO L168 Benchmark]: Toolchain (without parser) took 215354.05 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 49.3 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -44.5 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. [2018-10-14 16:38:15,298 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-14 16:38:15,299 INFO L168 Benchmark]: Boogie Preprocessor took 102.00 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-14 16:38:15,299 INFO L168 Benchmark]: RCFGBuilder took 957.01 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-10-14 16:38:15,299 INFO L168 Benchmark]: TraceAbstraction took 214290.73 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 49.3 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -86.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-14 16:38:15,301 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.00 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 957.01 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214290.73 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 49.3 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -86.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 260]: 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, 148 locations, 1 error locations. SAFE Result, 214.2s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 172.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2009 SDtfs, 25107 SDslu, 31974 SDs, 0 SdLazy, 44603 SolverSat, 1452 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1160 GetRequests, 44 SyntacticMatches, 27 SemanticMatches, 1089 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36190 ImplicationChecksByTransitivity, 156.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=488occurred in iteration=10, 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, 15 MinimizatonAttempts, 1310 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 38.5s InterpolantComputationTime, 2794 NumberOfCodeBlocks, 2794 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 2779 ConstructedInterpolants, 0 QuantifiedInterpolants, 12117023 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 561/1695 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_48.bpl_heapsep-2018-09-18.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-10-14_16-38-15-309.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/alternating_list_true-unreach-call_true-valid-memsafety.i_48.bpl_heapsep-2018-09-18.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-14_16-38-15-309.csv Received shutdown request...