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/memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-093a8c0 [2018-10-14 16:44:29,855 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-14 16:44:29,857 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-14 16:44:29,869 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-14 16:44:29,869 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-14 16:44:29,870 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-14 16:44:29,873 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-14 16:44:29,875 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-14 16:44:29,878 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-14 16:44:29,880 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-14 16:44:29,881 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-14 16:44:29,881 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-14 16:44:29,882 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-14 16:44:29,883 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-14 16:44:29,887 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-14 16:44:29,888 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-14 16:44:29,889 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-14 16:44:29,894 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-14 16:44:29,897 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-14 16:44:29,901 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-14 16:44:29,903 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-14 16:44:29,906 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-14 16:44:29,912 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-14 16:44:29,924 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 16:44:29,936 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-14 16:44:29,937 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-14 16:44:29,937 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-14 16:44:29,938 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-14 16:44:29,938 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-14 16:44:29,938 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-14 16:44:29,939 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-14 16:44:29,939 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-14 16:44:29,939 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-14 16:44:29,940 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-14 16:44:29,940 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-14 16:44:29,940 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-14 16:44:29,940 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-14 16:44:29,941 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-14 16:44:29,941 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-14 16:44:29,985 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-14 16:44:30,000 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-14 16:44:30,007 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-14 16:44:30,008 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-14 16:44:30,009 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-14 16:44:30,010 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl [2018-10-14 16:44:30,010 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl' [2018-10-14 16:44:30,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-14 16:44:30,091 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-14 16:44:30,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-14 16:44:30,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-14 16:44:30,091 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-14 16:44:30,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:44:30" (1/1) ... [2018-10-14 16:44:30,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:44:30" (1/1) ... [2018-10-14 16:44:30,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:44:30" (1/1) ... [2018-10-14 16:44:30,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:44:30" (1/1) ... [2018-10-14 16:44:30,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:44:30" (1/1) ... [2018-10-14 16:44:30,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:44:30" (1/1) ... [2018-10-14 16:44:30,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:44:30" (1/1) ... [2018-10-14 16:44:30,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-14 16:44:30,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-14 16:44:30,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-14 16:44:30,156 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-14 16:44:30,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:44:30" (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 16:44:30,234 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-14 16:44:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-14 16:44:30,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-14 16:44:30,772 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-14 16:44:30,773 INFO L202 PluginConnector]: Adding new model memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:44:30 BoogieIcfgContainer [2018-10-14 16:44:30,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-14 16:44:30,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-14 16:44:30,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-14 16:44:30,778 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-14 16:44:30,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 04:44:30" (1/2) ... [2018-10-14 16:44:30,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509ea292 and model type memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:44:30, skipping insertion in model container [2018-10-14 16:44:30,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:44:30" (2/2) ... [2018-10-14 16:44:30,781 INFO L112 eAbstractionObserver]: Analyzing ICFG memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl [2018-10-14 16:44:30,790 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-14 16:44:30,799 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-14 16:44:30,815 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-14 16:44:30,841 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-14 16:44:30,842 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-14 16:44:30,843 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-14 16:44:30,843 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-14 16:44:30,843 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-14 16:44:30,843 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-14 16:44:30,843 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-14 16:44:30,843 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-14 16:44:30,844 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-14 16:44:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-10-14 16:44:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-14 16:44:30,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:30,882 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] [2018-10-14 16:44:30,883 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:30,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:30,890 INFO L82 PathProgramCache]: Analyzing trace with hash 180571921, now seen corresponding path program 1 times [2018-10-14 16:44:30,938 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:31,128 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 16:44:31,130 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:44:31,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-14 16:44:31,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-14 16:44:31,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-14 16:44:31,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-14 16:44:31,154 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2018-10-14 16:44:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:31,265 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-14 16:44:31,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-14 16:44:31,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2018-10-14 16:44:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:31,279 INFO L225 Difference]: With dead ends: 39 [2018-10-14 16:44:31,279 INFO L226 Difference]: Without dead ends: 39 [2018-10-14 16:44:31,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-14 16:44:31,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-14 16:44:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-14 16:44:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-14 16:44:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-14 16:44:31,320 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-10-14 16:44:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:31,321 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-14 16:44:31,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-14 16:44:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-14 16:44:31,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-14 16:44:31,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:31,323 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] [2018-10-14 16:44:31,323 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:31,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:31,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1856720466, now seen corresponding path program 1 times [2018-10-14 16:44:31,325 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:31,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:31,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-14 16:44:31,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-14 16:44:31,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-14 16:44:31,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-14 16:44:31,462 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 5 states. [2018-10-14 16:44:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:31,588 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-14 16:44:31,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-14 16:44:31,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2018-10-14 16:44:31,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:31,591 INFO L225 Difference]: With dead ends: 41 [2018-10-14 16:44:31,591 INFO L226 Difference]: Without dead ends: 41 [2018-10-14 16:44:31,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-14 16:44:31,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-14 16:44:31,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-10-14 16:44:31,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-14 16:44:31,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-14 16:44:31,598 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-10-14 16:44:31,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:31,599 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-14 16:44:31,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-14 16:44:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-14 16:44:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-14 16:44:31,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:31,600 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] [2018-10-14 16:44:31,601 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:31,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:31,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2022736211, now seen corresponding path program 2 times [2018-10-14 16:44:31,602 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:31,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:31,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-14 16:44:31,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-14 16:44:31,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-14 16:44:31,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-14 16:44:31,829 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 6 states. [2018-10-14 16:44:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:32,139 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-14 16:44:32,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-14 16:44:32,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2018-10-14 16:44:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:32,141 INFO L225 Difference]: With dead ends: 43 [2018-10-14 16:44:32,141 INFO L226 Difference]: Without dead ends: 43 [2018-10-14 16:44:32,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-14 16:44:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-14 16:44:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-10-14 16:44:32,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-14 16:44:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-14 16:44:32,148 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-10-14 16:44:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:32,148 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-14 16:44:32,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-14 16:44:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-14 16:44:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-14 16:44:32,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:32,151 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:32,151 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:32,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:32,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1644890092, now seen corresponding path program 3 times [2018-10-14 16:44:32,154 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:32,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:32,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-14 16:44:32,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-14 16:44:32,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-14 16:44:32,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-14 16:44:32,378 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 7 states. [2018-10-14 16:44:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:32,511 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-14 16:44:32,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-14 16:44:32,513 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2018-10-14 16:44:32,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:32,515 INFO L225 Difference]: With dead ends: 45 [2018-10-14 16:44:32,516 INFO L226 Difference]: Without dead ends: 45 [2018-10-14 16:44:32,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-14 16:44:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-14 16:44:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-14 16:44:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-14 16:44:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-14 16:44:32,524 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-10-14 16:44:32,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:32,525 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-14 16:44:32,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-14 16:44:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-14 16:44:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-14 16:44:32,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:32,527 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:32,527 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:32,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:32,527 INFO L82 PathProgramCache]: Analyzing trace with hash -65617259, now seen corresponding path program 4 times [2018-10-14 16:44:32,528 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:32,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:32,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-14 16:44:32,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-14 16:44:32,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-14 16:44:32,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-10-14 16:44:32,636 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 8 states. [2018-10-14 16:44:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:33,077 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-14 16:44:33,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-14 16:44:33,078 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2018-10-14 16:44:33,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:33,079 INFO L225 Difference]: With dead ends: 47 [2018-10-14 16:44:33,079 INFO L226 Difference]: Without dead ends: 47 [2018-10-14 16:44:33,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-14 16:44:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-14 16:44:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2018-10-14 16:44:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-14 16:44:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-14 16:44:33,085 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-10-14 16:44:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:33,086 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-14 16:44:33,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-14 16:44:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-14 16:44:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-14 16:44:33,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:33,087 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:33,088 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:33,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:33,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1492119766, now seen corresponding path program 5 times [2018-10-14 16:44:33,089 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:33,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:33,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-14 16:44:33,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-14 16:44:33,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-14 16:44:33,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-10-14 16:44:33,248 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 9 states. [2018-10-14 16:44:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:33,474 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-14 16:44:33,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-14 16:44:33,478 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2018-10-14 16:44:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:33,479 INFO L225 Difference]: With dead ends: 49 [2018-10-14 16:44:33,479 INFO L226 Difference]: Without dead ends: 49 [2018-10-14 16:44:33,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-14 16:44:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-14 16:44:33,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-10-14 16:44:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-14 16:44:33,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-14 16:44:33,486 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-10-14 16:44:33,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:33,487 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-14 16:44:33,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-14 16:44:33,487 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-14 16:44:33,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-14 16:44:33,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:33,488 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:33,489 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:33,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:33,489 INFO L82 PathProgramCache]: Analyzing trace with hash -466185513, now seen corresponding path program 6 times [2018-10-14 16:44:33,490 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:33,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:33,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-14 16:44:33,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-14 16:44:33,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-14 16:44:33,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-14 16:44:33,772 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 10 states. [2018-10-14 16:44:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:34,225 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-14 16:44:34,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-14 16:44:34,225 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2018-10-14 16:44:34,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:34,226 INFO L225 Difference]: With dead ends: 51 [2018-10-14 16:44:34,227 INFO L226 Difference]: Without dead ends: 51 [2018-10-14 16:44:34,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-14 16:44:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-14 16:44:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-14 16:44:34,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-14 16:44:34,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-14 16:44:34,232 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-10-14 16:44:34,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:34,233 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-14 16:44:34,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-14 16:44:34,233 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-14 16:44:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-14 16:44:34,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:34,236 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:34,237 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:34,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:34,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1201882984, now seen corresponding path program 7 times [2018-10-14 16:44:34,239 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:34,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:34,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-14 16:44:34,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-14 16:44:34,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-14 16:44:34,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-10-14 16:44:34,462 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 11 states. [2018-10-14 16:44:34,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:34,630 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-14 16:44:34,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-14 16:44:34,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-10-14 16:44:34,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:34,632 INFO L225 Difference]: With dead ends: 53 [2018-10-14 16:44:34,633 INFO L226 Difference]: Without dead ends: 53 [2018-10-14 16:44:34,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-14 16:44:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-14 16:44:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2018-10-14 16:44:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-14 16:44:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-14 16:44:34,639 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-10-14 16:44:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:34,639 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-14 16:44:34,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-14 16:44:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-14 16:44:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-14 16:44:34,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:34,643 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:34,643 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:34,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:34,643 INFO L82 PathProgramCache]: Analyzing trace with hash 462451225, now seen corresponding path program 8 times [2018-10-14 16:44:34,644 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:34,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:34,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-14 16:44:34,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-14 16:44:34,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-14 16:44:34,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2018-10-14 16:44:34,818 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 12 states. [2018-10-14 16:44:34,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:34,991 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-14 16:44:34,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-14 16:44:34,991 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2018-10-14 16:44:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:34,992 INFO L225 Difference]: With dead ends: 55 [2018-10-14 16:44:34,992 INFO L226 Difference]: Without dead ends: 55 [2018-10-14 16:44:34,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-14 16:44:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-14 16:44:34,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2018-10-14 16:44:34,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-14 16:44:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-14 16:44:34,998 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-10-14 16:44:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:34,998 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-14 16:44:34,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-14 16:44:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-14 16:44:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-14 16:44:35,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:35,000 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:35,000 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:35,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:35,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2135175334, now seen corresponding path program 9 times [2018-10-14 16:44:35,002 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:35,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:35,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-14 16:44:35,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-14 16:44:35,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-14 16:44:35,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2018-10-14 16:44:35,234 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 13 states. [2018-10-14 16:44:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:35,434 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-14 16:44:35,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-14 16:44:35,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2018-10-14 16:44:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:35,435 INFO L225 Difference]: With dead ends: 57 [2018-10-14 16:44:35,436 INFO L226 Difference]: Without dead ends: 57 [2018-10-14 16:44:35,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-14 16:44:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-14 16:44:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-14 16:44:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-14 16:44:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-14 16:44:35,440 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-10-14 16:44:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:35,441 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-14 16:44:35,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-14 16:44:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-14 16:44:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-14 16:44:35,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:35,442 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:35,443 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:35,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:35,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1216667739, now seen corresponding path program 10 times [2018-10-14 16:44:35,444 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:35,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:35,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-14 16:44:35,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-14 16:44:35,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-14 16:44:35,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2018-10-14 16:44:35,648 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 14 states. [2018-10-14 16:44:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:36,014 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-14 16:44:36,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-14 16:44:36,018 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2018-10-14 16:44:36,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:36,019 INFO L225 Difference]: With dead ends: 59 [2018-10-14 16:44:36,019 INFO L226 Difference]: Without dead ends: 59 [2018-10-14 16:44:36,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-14 16:44:36,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-14 16:44:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2018-10-14 16:44:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-14 16:44:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-14 16:44:36,025 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-10-14 16:44:36,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:36,025 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-14 16:44:36,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-14 16:44:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-14 16:44:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-14 16:44:36,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:36,027 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:36,027 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:36,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:36,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1112388892, now seen corresponding path program 11 times [2018-10-14 16:44:36,029 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:36,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:36,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-14 16:44:36,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-14 16:44:36,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-14 16:44:36,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2018-10-14 16:44:36,288 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 15 states. [2018-10-14 16:44:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:36,762 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-14 16:44:36,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-14 16:44:36,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-10-14 16:44:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:36,764 INFO L225 Difference]: With dead ends: 61 [2018-10-14 16:44:36,764 INFO L226 Difference]: Without dead ends: 61 [2018-10-14 16:44:36,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-14 16:44:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-14 16:44:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2018-10-14 16:44:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-14 16:44:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-14 16:44:36,768 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-10-14 16:44:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:36,769 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-14 16:44:36,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-14 16:44:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-14 16:44:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-14 16:44:36,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:36,770 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:36,771 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:36,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:36,771 INFO L82 PathProgramCache]: Analyzing trace with hash -315335267, now seen corresponding path program 12 times [2018-10-14 16:44:36,772 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:37,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:37,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-14 16:44:37,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-14 16:44:37,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-14 16:44:37,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2018-10-14 16:44:37,117 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 16 states. [2018-10-14 16:44:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:37,494 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-14 16:44:37,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-14 16:44:37,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2018-10-14 16:44:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:37,495 INFO L225 Difference]: With dead ends: 63 [2018-10-14 16:44:37,496 INFO L226 Difference]: Without dead ends: 63 [2018-10-14 16:44:37,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-14 16:44:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-14 16:44:37,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-10-14 16:44:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-14 16:44:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-14 16:44:37,501 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-10-14 16:44:37,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:37,501 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-14 16:44:37,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-14 16:44:37,502 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-14 16:44:37,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-14 16:44:37,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:37,502 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:37,503 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:37,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:37,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2031282654, now seen corresponding path program 13 times [2018-10-14 16:44:37,504 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:37,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:37,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-14 16:44:37,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-14 16:44:37,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-14 16:44:37,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2018-10-14 16:44:37,705 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 17 states. [2018-10-14 16:44:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:38,203 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-14 16:44:38,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-14 16:44:38,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2018-10-14 16:44:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:38,209 INFO L225 Difference]: With dead ends: 65 [2018-10-14 16:44:38,210 INFO L226 Difference]: Without dead ends: 65 [2018-10-14 16:44:38,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-14 16:44:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-14 16:44:38,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2018-10-14 16:44:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-14 16:44:38,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-14 16:44:38,214 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-10-14 16:44:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:38,214 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-14 16:44:38,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-14 16:44:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-14 16:44:38,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-14 16:44:38,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:38,215 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:38,215 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:38,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:38,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2021692961, now seen corresponding path program 14 times [2018-10-14 16:44:38,217 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:38,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:38,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-14 16:44:38,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-14 16:44:38,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-14 16:44:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2018-10-14 16:44:38,480 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 18 states. [2018-10-14 16:44:38,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:38,729 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-14 16:44:38,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-14 16:44:38,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 63 [2018-10-14 16:44:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:38,731 INFO L225 Difference]: With dead ends: 67 [2018-10-14 16:44:38,731 INFO L226 Difference]: Without dead ends: 67 [2018-10-14 16:44:38,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-14 16:44:38,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-14 16:44:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2018-10-14 16:44:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-14 16:44:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-14 16:44:38,739 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-10-14 16:44:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:38,739 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-14 16:44:38,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-14 16:44:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-14 16:44:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-14 16:44:38,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:38,744 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:38,744 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:38,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:38,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1395921504, now seen corresponding path program 15 times [2018-10-14 16:44:38,745 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:39,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:39,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-14 16:44:39,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-14 16:44:39,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-14 16:44:39,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2018-10-14 16:44:39,861 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 19 states. [2018-10-14 16:44:40,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:40,327 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-14 16:44:40,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-14 16:44:40,330 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2018-10-14 16:44:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:40,331 INFO L225 Difference]: With dead ends: 69 [2018-10-14 16:44:40,331 INFO L226 Difference]: Without dead ends: 69 [2018-10-14 16:44:40,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-14 16:44:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-14 16:44:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-14 16:44:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-14 16:44:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-14 16:44:40,337 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-10-14 16:44:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:40,337 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-14 16:44:40,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-14 16:44:40,338 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-14 16:44:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-14 16:44:40,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:40,339 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:40,339 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:40,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:40,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1324972767, now seen corresponding path program 16 times [2018-10-14 16:44:40,340 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:40,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:40,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-14 16:44:40,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-14 16:44:40,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-14 16:44:40,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2018-10-14 16:44:40,645 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 20 states. [2018-10-14 16:44:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:41,078 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-14 16:44:41,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-14 16:44:41,079 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2018-10-14 16:44:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:41,079 INFO L225 Difference]: With dead ends: 71 [2018-10-14 16:44:41,079 INFO L226 Difference]: Without dead ends: 71 [2018-10-14 16:44:41,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-14 16:44:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-14 16:44:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2018-10-14 16:44:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-14 16:44:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-14 16:44:41,083 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-10-14 16:44:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:41,083 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-14 16:44:41,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-14 16:44:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-14 16:44:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-14 16:44:41,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:41,084 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:41,085 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:41,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1862713246, now seen corresponding path program 17 times [2018-10-14 16:44:41,086 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:41,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:41,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-14 16:44:41,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-14 16:44:41,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-14 16:44:41,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2018-10-14 16:44:41,405 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 21 states. [2018-10-14 16:44:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:41,831 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-14 16:44:41,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-14 16:44:41,832 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 69 [2018-10-14 16:44:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:41,833 INFO L225 Difference]: With dead ends: 73 [2018-10-14 16:44:41,833 INFO L226 Difference]: Without dead ends: 73 [2018-10-14 16:44:41,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-14 16:44:41,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-14 16:44:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2018-10-14 16:44:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-14 16:44:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-14 16:44:41,836 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-10-14 16:44:41,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:41,837 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-14 16:44:41,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-14 16:44:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-14 16:44:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-14 16:44:41,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:41,838 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:41,838 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:41,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:41,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1059729251, now seen corresponding path program 18 times [2018-10-14 16:44:41,839 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:42,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:42,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-14 16:44:42,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-14 16:44:42,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-14 16:44:42,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2018-10-14 16:44:42,417 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 22 states. [2018-10-14 16:44:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:42,857 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-14 16:44:42,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-14 16:44:42,858 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 71 [2018-10-14 16:44:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:42,859 INFO L225 Difference]: With dead ends: 75 [2018-10-14 16:44:42,859 INFO L226 Difference]: Without dead ends: 75 [2018-10-14 16:44:42,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-14 16:44:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-14 16:44:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-10-14 16:44:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-14 16:44:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-14 16:44:42,863 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-10-14 16:44:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:42,863 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-14 16:44:42,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-14 16:44:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-14 16:44:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-14 16:44:42,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:42,864 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:42,865 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:42,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:42,872 INFO L82 PathProgramCache]: Analyzing trace with hash 618357284, now seen corresponding path program 19 times [2018-10-14 16:44:42,873 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:43,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:43,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-14 16:44:43,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-14 16:44:43,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-14 16:44:43,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2018-10-14 16:44:43,803 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 23 states. [2018-10-14 16:44:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:44,233 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-14 16:44:44,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-14 16:44:44,234 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 73 [2018-10-14 16:44:44,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:44,234 INFO L225 Difference]: With dead ends: 77 [2018-10-14 16:44:44,235 INFO L226 Difference]: Without dead ends: 77 [2018-10-14 16:44:44,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-14 16:44:44,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-14 16:44:44,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2018-10-14 16:44:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-14 16:44:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-14 16:44:44,237 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-10-14 16:44:44,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:44,238 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-14 16:44:44,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-14 16:44:44,238 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-14 16:44:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-14 16:44:44,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:44,239 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-14 16:44:44,239 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:44,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:44,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1661659301, now seen corresponding path program 20 times [2018-10-14 16:44:44,240 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:45,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:45,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-14 16:44:45,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-14 16:44:45,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-14 16:44:45,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2018-10-14 16:44:45,181 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 24 states. [2018-10-14 16:44:45,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:45,569 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-14 16:44:45,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-14 16:44:45,569 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 75 [2018-10-14 16:44:45,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:45,570 INFO L225 Difference]: With dead ends: 79 [2018-10-14 16:44:45,570 INFO L226 Difference]: Without dead ends: 79 [2018-10-14 16:44:45,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-14 16:44:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-14 16:44:45,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2018-10-14 16:44:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-14 16:44:45,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-14 16:44:45,574 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-10-14 16:44:45,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:45,574 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-14 16:44:45,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-14 16:44:45,575 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-14 16:44:45,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-14 16:44:45,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:45,575 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:44:45,576 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:45,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:45,576 INFO L82 PathProgramCache]: Analyzing trace with hash -747449626, now seen corresponding path program 21 times [2018-10-14 16:44:45,577 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:45,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:45,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-14 16:44:45,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-14 16:44:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-14 16:44:45,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2018-10-14 16:44:45,931 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 25 states. [2018-10-14 16:44:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:46,641 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-14 16:44:46,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-14 16:44:46,649 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 77 [2018-10-14 16:44:46,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:46,650 INFO L225 Difference]: With dead ends: 81 [2018-10-14 16:44:46,650 INFO L226 Difference]: Without dead ends: 81 [2018-10-14 16:44:46,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-14 16:44:46,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-14 16:44:46,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-10-14 16:44:46,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-14 16:44:46,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-14 16:44:46,653 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-10-14 16:44:46,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:46,654 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-14 16:44:46,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-14 16:44:46,654 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-14 16:44:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-14 16:44:46,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:46,655 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:44:46,655 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:46,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:46,655 INFO L82 PathProgramCache]: Analyzing trace with hash -913755929, now seen corresponding path program 22 times [2018-10-14 16:44:46,656 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:47,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:47,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-14 16:44:47,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-14 16:44:47,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-14 16:44:47,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2018-10-14 16:44:47,059 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 26 states. [2018-10-14 16:44:47,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:47,593 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-14 16:44:47,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-14 16:44:47,594 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2018-10-14 16:44:47,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:47,594 INFO L225 Difference]: With dead ends: 83 [2018-10-14 16:44:47,595 INFO L226 Difference]: Without dead ends: 83 [2018-10-14 16:44:47,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-14 16:44:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-14 16:44:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2018-10-14 16:44:47,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-14 16:44:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-14 16:44:47,598 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-10-14 16:44:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:47,598 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-14 16:44:47,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-14 16:44:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-14 16:44:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-14 16:44:47,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:47,599 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:44:47,600 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:47,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:47,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1820323160, now seen corresponding path program 23 times [2018-10-14 16:44:47,601 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:48,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:48,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-14 16:44:48,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-14 16:44:48,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-14 16:44:48,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2018-10-14 16:44:48,529 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 27 states. [2018-10-14 16:44:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:49,162 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-14 16:44:49,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-14 16:44:49,162 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 81 [2018-10-14 16:44:49,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:49,163 INFO L225 Difference]: With dead ends: 85 [2018-10-14 16:44:49,164 INFO L226 Difference]: Without dead ends: 85 [2018-10-14 16:44:49,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-14 16:44:49,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-14 16:44:49,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2018-10-14 16:44:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-14 16:44:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-14 16:44:49,167 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-10-14 16:44:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:49,168 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-14 16:44:49,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-14 16:44:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-14 16:44:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-14 16:44:49,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:49,168 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:44:49,169 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:49,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:49,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1153071063, now seen corresponding path program 24 times [2018-10-14 16:44:49,170 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:49,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:49,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-14 16:44:49,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-14 16:44:49,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-14 16:44:49,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2018-10-14 16:44:49,584 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 28 states. [2018-10-14 16:44:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:50,168 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-14 16:44:50,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-14 16:44:50,169 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 83 [2018-10-14 16:44:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:50,170 INFO L225 Difference]: With dead ends: 87 [2018-10-14 16:44:50,170 INFO L226 Difference]: Without dead ends: 87 [2018-10-14 16:44:50,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-14 16:44:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-14 16:44:50,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-10-14 16:44:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-14 16:44:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-14 16:44:50,174 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-10-14 16:44:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:50,174 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-14 16:44:50,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-14 16:44:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-14 16:44:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-14 16:44:50,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:50,175 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:44:50,175 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:50,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash 126067050, now seen corresponding path program 25 times [2018-10-14 16:44:50,176 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:50,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:50,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-14 16:44:50,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-14 16:44:50,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-14 16:44:50,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2018-10-14 16:44:50,625 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 29 states. [2018-10-14 16:44:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:51,582 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-14 16:44:51,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-14 16:44:51,589 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-10-14 16:44:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:51,590 INFO L225 Difference]: With dead ends: 89 [2018-10-14 16:44:51,590 INFO L226 Difference]: Without dead ends: 89 [2018-10-14 16:44:51,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-14 16:44:51,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-14 16:44:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2018-10-14 16:44:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-14 16:44:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-14 16:44:51,592 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-10-14 16:44:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:51,593 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-14 16:44:51,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-14 16:44:51,593 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-14 16:44:51,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-14 16:44:51,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:51,593 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:44:51,594 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:51,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:51,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1017146987, now seen corresponding path program 26 times [2018-10-14 16:44:51,595 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:52,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:52,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-14 16:44:52,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-14 16:44:52,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-14 16:44:52,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2018-10-14 16:44:52,054 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 30 states. [2018-10-14 16:44:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:52,711 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-14 16:44:52,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-14 16:44:52,711 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2018-10-14 16:44:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:52,712 INFO L225 Difference]: With dead ends: 91 [2018-10-14 16:44:52,713 INFO L226 Difference]: Without dead ends: 91 [2018-10-14 16:44:52,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-14 16:44:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-14 16:44:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2018-10-14 16:44:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-14 16:44:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-14 16:44:52,717 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-10-14 16:44:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:52,717 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-14 16:44:52,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-14 16:44:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-14 16:44:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-14 16:44:52,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:52,718 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:44:52,718 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:52,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:52,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1648492756, now seen corresponding path program 27 times [2018-10-14 16:44:52,719 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:53,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:53,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-14 16:44:53,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-14 16:44:53,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-14 16:44:53,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2018-10-14 16:44:53,189 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 31 states. [2018-10-14 16:44:53,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:53,959 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-14 16:44:53,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-14 16:44:53,960 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-10-14 16:44:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:53,961 INFO L225 Difference]: With dead ends: 93 [2018-10-14 16:44:53,961 INFO L226 Difference]: Without dead ends: 93 [2018-10-14 16:44:53,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-14 16:44:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-14 16:44:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-10-14 16:44:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-14 16:44:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-14 16:44:53,964 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-10-14 16:44:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:53,965 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-14 16:44:53,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-14 16:44:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-14 16:44:53,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-14 16:44:53,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:53,966 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:44:53,966 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:53,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:53,966 INFO L82 PathProgramCache]: Analyzing trace with hash 767189933, now seen corresponding path program 28 times [2018-10-14 16:44:53,967 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:54,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:54,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-14 16:44:54,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-14 16:44:54,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-14 16:44:54,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2018-10-14 16:44:54,424 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 32 states. [2018-10-14 16:44:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:55,285 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-14 16:44:55,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-14 16:44:55,286 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2018-10-14 16:44:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:55,287 INFO L225 Difference]: With dead ends: 95 [2018-10-14 16:44:55,287 INFO L226 Difference]: Without dead ends: 95 [2018-10-14 16:44:55,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-14 16:44:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-14 16:44:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2018-10-14 16:44:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-14 16:44:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-14 16:44:55,292 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-10-14 16:44:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:55,292 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-14 16:44:55,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-14 16:44:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-14 16:44:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-14 16:44:55,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:55,293 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:44:55,293 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:55,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1339053074, now seen corresponding path program 29 times [2018-10-14 16:44:55,294 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:55,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:55,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-14 16:44:55,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-14 16:44:55,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-14 16:44:55,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2018-10-14 16:44:55,789 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 33 states. [2018-10-14 16:44:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:56,822 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-14 16:44:56,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-14 16:44:56,822 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 93 [2018-10-14 16:44:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:56,823 INFO L225 Difference]: With dead ends: 97 [2018-10-14 16:44:56,823 INFO L226 Difference]: Without dead ends: 97 [2018-10-14 16:44:56,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-14 16:44:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-14 16:44:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2018-10-14 16:44:56,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-14 16:44:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-14 16:44:56,826 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-10-14 16:44:56,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:56,827 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-14 16:44:56,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-14 16:44:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-14 16:44:56,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-14 16:44:56,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:56,827 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:44:56,827 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:56,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:56,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1785980911, now seen corresponding path program 30 times [2018-10-14 16:44:56,828 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:57,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:57,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-14 16:44:57,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-14 16:44:57,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-14 16:44:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2018-10-14 16:44:57,555 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 34 states. [2018-10-14 16:44:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:44:58,340 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-14 16:44:58,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-14 16:44:58,340 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 95 [2018-10-14 16:44:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:44:58,341 INFO L225 Difference]: With dead ends: 99 [2018-10-14 16:44:58,341 INFO L226 Difference]: Without dead ends: 99 [2018-10-14 16:44:58,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-14 16:44:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-14 16:44:58,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-10-14 16:44:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-14 16:44:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-14 16:44:58,345 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-10-14 16:44:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:44:58,346 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-14 16:44:58,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-14 16:44:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-14 16:44:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-14 16:44:58,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:44:58,346 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:44:58,347 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:44:58,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:44:58,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1533466704, now seen corresponding path program 31 times [2018-10-14 16:44:58,347 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:44:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:44:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:44:59,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:44:59,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-14 16:44:59,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-14 16:44:59,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-14 16:44:59,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2018-10-14 16:44:59,160 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 35 states. [2018-10-14 16:45:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:45:00,038 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-14 16:45:00,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-14 16:45:00,039 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 97 [2018-10-14 16:45:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:45:00,040 INFO L225 Difference]: With dead ends: 101 [2018-10-14 16:45:00,040 INFO L226 Difference]: Without dead ends: 101 [2018-10-14 16:45:00,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-14 16:45:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-14 16:45:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2018-10-14 16:45:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-14 16:45:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-14 16:45:00,044 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-10-14 16:45:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:45:00,045 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-14 16:45:00,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-14 16:45:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-14 16:45:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-14 16:45:00,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:45:00,046 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:00,046 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:45:00,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:45:00,046 INFO L82 PathProgramCache]: Analyzing trace with hash -361923791, now seen corresponding path program 32 times [2018-10-14 16:45:00,047 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:45:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:45:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:45:00,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:45:00,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-14 16:45:00,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-14 16:45:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-14 16:45:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2018-10-14 16:45:00,799 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 36 states. [2018-10-14 16:45:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:45:01,817 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-14 16:45:01,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-14 16:45:01,817 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 99 [2018-10-14 16:45:01,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:45:01,818 INFO L225 Difference]: With dead ends: 103 [2018-10-14 16:45:01,818 INFO L226 Difference]: Without dead ends: 103 [2018-10-14 16:45:01,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-14 16:45:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-14 16:45:01,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2018-10-14 16:45:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-14 16:45:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-14 16:45:01,822 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-10-14 16:45:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:45:01,822 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-14 16:45:01,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-14 16:45:01,822 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-14 16:45:01,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-14 16:45:01,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:45:01,823 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:01,823 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:45:01,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:45:01,823 INFO L82 PathProgramCache]: Analyzing trace with hash 209384050, now seen corresponding path program 33 times [2018-10-14 16:45:01,824 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:45:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:45:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:45:02,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:45:02,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-14 16:45:02,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-14 16:45:02,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-14 16:45:02,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2018-10-14 16:45:02,605 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 37 states. [2018-10-14 16:45:03,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:45:03,527 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-14 16:45:03,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-14 16:45:03,528 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 101 [2018-10-14 16:45:03,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:45:03,529 INFO L225 Difference]: With dead ends: 105 [2018-10-14 16:45:03,529 INFO L226 Difference]: Without dead ends: 105 [2018-10-14 16:45:03,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-14 16:45:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-14 16:45:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-10-14 16:45:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-14 16:45:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-14 16:45:03,533 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-10-14 16:45:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:45:03,533 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-14 16:45:03,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-14 16:45:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-14 16:45:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-14 16:45:03,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:45:03,534 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:03,534 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:45:03,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:45:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash -519594637, now seen corresponding path program 34 times [2018-10-14 16:45:03,535 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:45:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:45:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:45:04,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:45:04,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-14 16:45:04,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-14 16:45:04,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-14 16:45:04,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2018-10-14 16:45:04,308 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 38 states. [2018-10-14 16:45:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:45:05,483 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-14 16:45:05,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-14 16:45:05,483 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2018-10-14 16:45:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:45:05,484 INFO L225 Difference]: With dead ends: 107 [2018-10-14 16:45:05,484 INFO L226 Difference]: Without dead ends: 107 [2018-10-14 16:45:05,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-14 16:45:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-14 16:45:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2018-10-14 16:45:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-14 16:45:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-14 16:45:05,486 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-10-14 16:45:05,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:45:05,487 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-14 16:45:05,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-14 16:45:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-14 16:45:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-14 16:45:05,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:45:05,488 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:05,488 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:45:05,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:45:05,488 INFO L82 PathProgramCache]: Analyzing trace with hash -988443596, now seen corresponding path program 35 times [2018-10-14 16:45:05,489 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:45:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:45:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:45:06,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:45:06,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-14 16:45:06,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-14 16:45:06,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-14 16:45:06,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2018-10-14 16:45:06,164 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 39 states. [2018-10-14 16:45:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:45:07,448 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-14 16:45:07,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-14 16:45:07,449 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 105 [2018-10-14 16:45:07,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:45:07,449 INFO L225 Difference]: With dead ends: 109 [2018-10-14 16:45:07,449 INFO L226 Difference]: Without dead ends: 109 [2018-10-14 16:45:07,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-14 16:45:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-14 16:45:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2018-10-14 16:45:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-14 16:45:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-14 16:45:07,452 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-10-14 16:45:07,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:45:07,453 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-14 16:45:07,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-14 16:45:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-14 16:45:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-14 16:45:07,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:45:07,454 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:07,454 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:45:07,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:45:07,454 INFO L82 PathProgramCache]: Analyzing trace with hash -580727115, now seen corresponding path program 36 times [2018-10-14 16:45:07,455 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:45:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:45:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:45:08,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:45:08,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-14 16:45:08,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-14 16:45:08,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-14 16:45:08,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2018-10-14 16:45:08,472 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 40 states. [2018-10-14 16:45:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:45:09,600 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-14 16:45:09,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-14 16:45:09,600 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 107 [2018-10-14 16:45:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:45:09,601 INFO L225 Difference]: With dead ends: 111 [2018-10-14 16:45:09,601 INFO L226 Difference]: Without dead ends: 111 [2018-10-14 16:45:09,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-14 16:45:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-14 16:45:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-10-14 16:45:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-14 16:45:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-14 16:45:09,606 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-10-14 16:45:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:45:09,606 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-14 16:45:09,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-14 16:45:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-14 16:45:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-14 16:45:09,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:45:09,607 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:09,607 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:45:09,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:45:09,608 INFO L82 PathProgramCache]: Analyzing trace with hash 392787190, now seen corresponding path program 37 times [2018-10-14 16:45:09,608 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:45:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:45:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:45:10,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:45:10,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-14 16:45:10,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-14 16:45:10,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-14 16:45:10,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=857, Unknown=0, NotChecked=0, Total=1640 [2018-10-14 16:45:10,999 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 41 states. [2018-10-14 16:45:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:45:13,286 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-14 16:45:13,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-14 16:45:13,286 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 109 [2018-10-14 16:45:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:45:13,287 INFO L225 Difference]: With dead ends: 113 [2018-10-14 16:45:13,287 INFO L226 Difference]: Without dead ends: 113 [2018-10-14 16:45:13,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-14 16:45:13,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-14 16:45:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2018-10-14 16:45:13,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-14 16:45:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-14 16:45:13,290 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-10-14 16:45:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:45:13,291 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-14 16:45:13,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-14 16:45:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-14 16:45:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-14 16:45:13,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:45:13,292 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:13,292 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:45:13,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:45:13,292 INFO L82 PathProgramCache]: Analyzing trace with hash -362836233, now seen corresponding path program 38 times [2018-10-14 16:45:13,293 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:45:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:45:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:45:14,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:45:14,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-14 16:45:14,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-14 16:45:14,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-14 16:45:14,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=899, Unknown=0, NotChecked=0, Total=1722 [2018-10-14 16:45:14,451 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 42 states. [2018-10-14 16:45:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:45:15,577 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-14 16:45:15,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-14 16:45:15,578 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 111 [2018-10-14 16:45:15,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:45:15,579 INFO L225 Difference]: With dead ends: 115 [2018-10-14 16:45:15,579 INFO L226 Difference]: Without dead ends: 115 [2018-10-14 16:45:15,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-14 16:45:15,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-14 16:45:15,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2018-10-14 16:45:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-14 16:45:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-14 16:45:15,583 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-10-14 16:45:15,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:45:15,583 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-14 16:45:15,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-14 16:45:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-14 16:45:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-14 16:45:15,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:45:15,584 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:15,585 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:45:15,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:45:15,585 INFO L82 PathProgramCache]: Analyzing trace with hash -667472712, now seen corresponding path program 39 times [2018-10-14 16:45:15,585 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:45:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:45:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-14 16:45:16,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-14 16:45:16,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-14 16:45:16,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-14 16:45:16,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-14 16:45:16,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2018-10-14 16:45:16,529 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 43 states. [2018-10-14 16:45:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:45:18,026 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-10-14 16:45:18,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-14 16:45:18,026 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 113 [2018-10-14 16:45:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:45:18,027 INFO L225 Difference]: With dead ends: 116 [2018-10-14 16:45:18,027 INFO L226 Difference]: Without dead ends: 116 [2018-10-14 16:45:18,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-14 16:45:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-14 16:45:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-14 16:45:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-14 16:45:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-14 16:45:18,031 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-10-14 16:45:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:45:18,031 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-14 16:45:18,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-14 16:45:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-14 16:45:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-14 16:45:18,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-14 16:45:18,032 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:18,033 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-14 16:45:18,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-14 16:45:18,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1365352903, now seen corresponding path program 40 times [2018-10-14 16:45:18,034 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-14 16:45:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-14 16:45:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2018-10-14 16:45:18,368 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-14 16:45:18,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-10-14 16:45:18,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-14 16:45:18,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-14 16:45:18,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-10-14 16:45:18,369 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 9 states. [2018-10-14 16:45:18,878 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-10-14 16:45:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-14 16:45:19,023 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-14 16:45:19,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-14 16:45:19,023 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 115 [2018-10-14 16:45:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-14 16:45:19,024 INFO L225 Difference]: With dead ends: 114 [2018-10-14 16:45:19,024 INFO L226 Difference]: Without dead ends: 0 [2018-10-14 16:45:19,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2018-10-14 16:45:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-14 16:45:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-14 16:45:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-14 16:45:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-14 16:45:19,026 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 115 [2018-10-14 16:45:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-14 16:45:19,026 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-14 16:45:19,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-14 16:45:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-14 16:45:19,026 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-14 16:45:19,030 INFO L202 PluginConnector]: Adding new model memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 04:45:19 BoogieIcfgContainer [2018-10-14 16:45:19,030 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-14 16:45:19,031 INFO L168 Benchmark]: Toolchain (without parser) took 48941.90 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 469.2 MB). Free memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: -432.6 MB). Peak memory consumption was 36.7 MB. Max. memory is 7.1 GB. [2018-10-14 16:45:19,032 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 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 16:45:19,033 INFO L168 Benchmark]: Boogie Preprocessor took 57.36 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 16:45:19,033 INFO L168 Benchmark]: RCFGBuilder took 618.06 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-14 16:45:19,034 INFO L168 Benchmark]: TraceAbstraction took 48256.33 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 469.2 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -453.7 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2018-10-14 16:45:19,037 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.36 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 618.06 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 48256.33 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 469.2 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -453.7 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 79]: 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, 39 locations, 1 error locations. SAFE Result, 48.1s OverallTime, 41 OverallIterations, 40 TraceHistogramMax, 26.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1303 SDtfs, 2319 SDslu, 20359 SDs, 0 SdLazy, 5378 SolverSat, 873 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1738 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1655 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10679 ImplicationChecksByTransitivity, 37.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=40, 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, 41 MinimizatonAttempts, 39 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 20.3s InterpolantComputationTime, 3075 NumberOfCodeBlocks, 3075 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 3034 ConstructedInterpolants, 0 QuantifiedInterpolants, 912982 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 41 InterpolantComputations, 2 PerfectInterpolantSequences, 1600/22140 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/memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl_heapsep-2018-09-18.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-10-14_16-45-19-047.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/memsetNonZero2_true-valid-memsafety_true-termination.c_4.bpl_heapsep-2018-09-18.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-14_16-45-19-047.csv Received shutdown request...