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/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/real-life/GateController.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:13:44,077 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:13:44,079 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:13:44,091 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:13:44,091 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:13:44,092 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:13:44,094 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:13:44,095 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:13:44,097 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:13:44,098 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:13:44,099 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:13:44,125 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 12:13:44,141 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:13:44,141 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:13:44,142 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:13:44,143 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:13:44,143 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:13:44,143 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:13:44,144 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:13:44,144 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:13:44,144 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:13:44,144 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:13:44,145 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:13:44,145 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:13:44,145 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:13:44,145 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:13:44,145 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:13:44,146 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:13:44,146 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:13:44,146 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:13:44,146 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:13:44,147 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:13:44,147 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:13:44,147 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:13:44,147 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:13:44,147 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:13:44,148 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:13:44,148 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:13:44,148 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:13:44,148 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:13:44,148 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:13:44,149 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:13:44,203 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:13:44,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:13:44,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:13:44,222 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:13:44,222 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:13:44,223 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl [2018-10-04 12:13:44,224 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl' [2018-10-04 12:13:44,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:13:44,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:13:44,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:13:44,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:13:44,276 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:13:44,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:13:44" (1/1) ... [2018-10-04 12:13:44,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:13:44" (1/1) ... [2018-10-04 12:13:44,315 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 12:13:44,316 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 12:13:44,316 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 12:13:44,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:13:44,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:13:44,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:13:44,320 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:13:44,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:13:44" (1/1) ... [2018-10-04 12:13:44,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:13:44" (1/1) ... [2018-10-04 12:13:44,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:13:44" (1/1) ... [2018-10-04 12:13:44,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:13:44" (1/1) ... [2018-10-04 12:13:44,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:13:44" (1/1) ... [2018-10-04 12:13:44,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:13:44" (1/1) ... [2018-10-04 12:13:44,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:13:44" (1/1) ... [2018-10-04 12:13:44,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:13:44,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:13:44,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:13:44,345 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:13:44,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:13:44" (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:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:13:44,432 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-10-04 12:13:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-10-04 12:13:44,432 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-10-04 12:13:44,714 INFO L338 CfgBuilder]: Using library mode [2018-10-04 12:13:44,714 INFO L202 PluginConnector]: Adding new model GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:13:44 BoogieIcfgContainer [2018-10-04 12:13:44,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:13:44,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:13:44,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:13:44,719 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:13:44,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:13:44" (1/2) ... [2018-10-04 12:13:44,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258ab554 and model type GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:13:44, skipping insertion in model container [2018-10-04 12:13:44,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:13:44" (2/2) ... [2018-10-04 12:13:44,723 INFO L112 eAbstractionObserver]: Analyzing ICFG GateController.bpl [2018-10-04 12:13:44,733 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:13:44,741 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:13:44,791 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:13:44,792 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:13:44,792 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:13:44,793 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:13:44,793 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:13:44,793 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:13:44,793 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:13:44,793 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:13:44,794 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:13:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-10-04 12:13:44,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 12:13:44,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:44,817 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 12:13:44,819 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:44,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash 30432, now seen corresponding path program 1 times [2018-10-04 12:13:44,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:44,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:44,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:44,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:13:44,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:44,978 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:13:44,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:13:44,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:13:44,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:13:44,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:13:44,997 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-10-04 12:13:45,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:45,094 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2018-10-04 12:13:45,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:13:45,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 12:13:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:45,107 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:13:45,108 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:13:45,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:13:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:13:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-10-04 12:13:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:13:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-10-04 12:13:45,148 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 3 [2018-10-04 12:13:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:45,149 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-10-04 12:13:45,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:13:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-10-04 12:13:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:13:45,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:45,150 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:13:45,151 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:45,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:45,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1953617644, now seen corresponding path program 1 times [2018-10-04 12:13:45,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:45,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:45,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:45,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:13:45,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:45,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:13:45,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:13:45,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:13:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:45,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:13:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:45,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:13:45,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-10-04 12:13:45,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:13:45,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:13:45,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:13:45,877 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 8 states. [2018-10-04 12:13:46,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:46,035 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-10-04 12:13:46,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:13:46,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-04 12:13:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:46,037 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:13:46,037 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:13:46,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:13:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:13:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-10-04 12:13:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:13:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-10-04 12:13:46,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-10-04 12:13:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:46,044 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-10-04 12:13:46,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:13:46,045 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-10-04 12:13:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:13:46,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:46,045 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:13:46,046 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:46,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:46,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1953558062, now seen corresponding path program 1 times [2018-10-04 12:13:46,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:46,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:46,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:46,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:13:46,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:46,085 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:13:46,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:13:46,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:13:46,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:13:46,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:13:46,087 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 3 states. [2018-10-04 12:13:46,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:46,104 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-10-04 12:13:46,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:13:46,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-10-04 12:13:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:46,106 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:13:46,106 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:13:46,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:13:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:13:46,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 12:13:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:13:46,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 12:13:46,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2018-10-04 12:13:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:46,113 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 12:13:46,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:13:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 12:13:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:13:46,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:46,115 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-10-04 12:13:46,115 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:46,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:46,116 INFO L82 PathProgramCache]: Analyzing trace with hash 72785504, now seen corresponding path program 2 times [2018-10-04 12:13:46,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:46,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:46,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:46,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:13:46,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:46,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:13:46,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:13:46,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:13:46,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:13:46,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:13:46,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:13:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:46,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:13:46,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-04 12:13:46,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:13:46,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:13:46,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:13:46,782 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 12 states. [2018-10-04 12:13:47,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:47,004 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2018-10-04 12:13:47,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:13:47,005 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2018-10-04 12:13:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:47,006 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:13:47,006 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:13:47,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:13:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:13:47,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-04 12:13:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:13:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2018-10-04 12:13:47,012 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2018-10-04 12:13:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:47,013 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2018-10-04 12:13:47,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:13:47,013 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2018-10-04 12:13:47,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:13:47,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:47,014 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-10-04 12:13:47,014 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:47,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash 491282284, now seen corresponding path program 3 times [2018-10-04 12:13:47,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:47,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:47,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:47,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:13:47,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:47,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:13:47,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:13:47,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:13:47,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:13:47,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:13:47,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:13:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:47,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:13:47,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-10-04 12:13:47,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:13:47,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:13:47,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:13:47,840 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 16 states. [2018-10-04 12:13:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:47,944 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-10-04 12:13:47,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:13:47,947 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-10-04 12:13:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:47,949 INFO L225 Difference]: With dead ends: 30 [2018-10-04 12:13:47,949 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:13:47,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:13:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:13:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-10-04 12:13:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:13:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-10-04 12:13:47,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2018-10-04 12:13:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:47,956 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-10-04 12:13:47,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:13:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-10-04 12:13:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:13:47,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:47,957 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-10-04 12:13:47,957 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:47,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1589732832, now seen corresponding path program 4 times [2018-10-04 12:13:47,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:47,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:47,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:47,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:13:47,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:48,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:13:48,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:13:48,171 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:13:48,182 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:13:48,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:13:48,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:13:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:48,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:13:48,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-04 12:13:48,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:13:48,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:13:48,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:13:48,583 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 20 states. [2018-10-04 12:13:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:48,916 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-10-04 12:13:48,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:13:48,917 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2018-10-04 12:13:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:48,918 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:13:48,918 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:13:48,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:13:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:13:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-10-04 12:13:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:13:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2018-10-04 12:13:48,932 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 23 [2018-10-04 12:13:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:48,933 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2018-10-04 12:13:48,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:13:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2018-10-04 12:13:48,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:13:48,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:48,937 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-10-04 12:13:48,938 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:48,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:48,941 INFO L82 PathProgramCache]: Analyzing trace with hash 602818540, now seen corresponding path program 5 times [2018-10-04 12:13:48,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:48,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:48,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:48,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:13:48,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:49,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:13:49,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:13:49,280 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:13:49,299 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:13:49,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:13:49,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:13:49,716 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-04 12:13:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:50,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:13:50,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-10-04 12:13:50,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:13:50,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:13:50,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:13:50,096 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 24 states. [2018-10-04 12:13:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:50,235 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2018-10-04 12:13:50,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:13:50,236 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2018-10-04 12:13:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:50,237 INFO L225 Difference]: With dead ends: 40 [2018-10-04 12:13:50,237 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:13:50,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:13:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:13:50,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-10-04 12:13:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:13:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2018-10-04 12:13:50,244 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 28 [2018-10-04 12:13:50,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:50,244 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2018-10-04 12:13:50,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:13:50,245 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2018-10-04 12:13:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 12:13:50,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:50,246 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-10-04 12:13:50,246 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:50,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:50,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1979239776, now seen corresponding path program 6 times [2018-10-04 12:13:50,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:50,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:50,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:50,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:13:50,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:50,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:13:50,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:13:50,463 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:13:50,503 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:13:50,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:13:50,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:13:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:51,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:13:51,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-10-04 12:13:51,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:13:51,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:13:51,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:13:51,088 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 28 states. [2018-10-04 12:13:51,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:51,274 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2018-10-04 12:13:51,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:13:51,276 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2018-10-04 12:13:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:51,277 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:13:51,277 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:13:51,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:13:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:13:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-04 12:13:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:13:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2018-10-04 12:13:51,284 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 33 [2018-10-04 12:13:51,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:51,285 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2018-10-04 12:13:51,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:13:51,285 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2018-10-04 12:13:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:13:51,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:51,286 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-10-04 12:13:51,287 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:51,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:51,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1800695700, now seen corresponding path program 7 times [2018-10-04 12:13:51,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:51,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:51,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:51,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:13:51,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:51,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:13:51,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:13:51,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:13:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:51,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:13:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:52,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:13:52,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-10-04 12:13:52,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:13:52,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:13:52,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=699, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:13:52,196 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 32 states. [2018-10-04 12:13:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:52,364 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2018-10-04 12:13:52,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:13:52,364 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 38 [2018-10-04 12:13:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:52,366 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:13:52,366 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 12:13:52,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=293, Invalid=699, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:13:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 12:13:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-10-04 12:13:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:13:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2018-10-04 12:13:52,373 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 38 [2018-10-04 12:13:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:52,373 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2018-10-04 12:13:52,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:13:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2018-10-04 12:13:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 12:13:52,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:52,375 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-10-04 12:13:52,375 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:52,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:52,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1430989600, now seen corresponding path program 8 times [2018-10-04 12:13:52,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:52,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:52,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:52,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:13:52,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:52,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:13:52,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:13:52,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:13:52,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:13:52,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:13:52,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:13:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:53,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:13:53,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-10-04 12:13:53,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:13:53,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:13:53,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:13:53,319 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 36 states. [2018-10-04 12:13:53,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:53,581 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-10-04 12:13:53,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:13:53,582 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2018-10-04 12:13:53,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:53,583 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:13:53,584 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:13:53,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:13:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:13:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-10-04 12:13:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:13:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2018-10-04 12:13:53,592 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 43 [2018-10-04 12:13:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:53,592 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2018-10-04 12:13:53,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:13:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2018-10-04 12:13:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:13:53,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:53,594 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-10-04 12:13:53,594 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:53,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:53,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1043842836, now seen corresponding path program 9 times [2018-10-04 12:13:53,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:53,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:53,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:53,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:13:53,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:53,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:13:53,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:13:53,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:13:53,866 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 12:13:53,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:13:53,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:13:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:55,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:13:55,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-10-04 12:13:55,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:13:55,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:13:55,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:13:55,109 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 40 states. [2018-10-04 12:13:55,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:55,367 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2018-10-04 12:13:55,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:13:55,367 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2018-10-04 12:13:55,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:55,368 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:13:55,368 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 12:13:55,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:13:55,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 12:13:55,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-10-04 12:13:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 12:13:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2018-10-04 12:13:55,374 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 48 [2018-10-04 12:13:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:55,375 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2018-10-04 12:13:55,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:13:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2018-10-04 12:13:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:13:55,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:55,376 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-10-04 12:13:55,376 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:55,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:55,377 INFO L82 PathProgramCache]: Analyzing trace with hash -676496288, now seen corresponding path program 10 times [2018-10-04 12:13:55,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:55,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:55,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:55,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:13:55,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:55,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:13:55,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:13:55,704 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:13:55,743 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:13:55,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:13:55,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:13:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:56,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:13:56,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-10-04 12:13:56,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:13:56,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:13:56,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=1356, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:13:56,564 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 44 states. [2018-10-04 12:13:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:56,870 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2018-10-04 12:13:56,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:13:56,871 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2018-10-04 12:13:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:56,872 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:13:56,872 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:13:56,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=536, Invalid=1356, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:13:56,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:13:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-04 12:13:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:13:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-10-04 12:13:56,880 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 53 [2018-10-04 12:13:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:56,880 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-10-04 12:13:56,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:13:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-10-04 12:13:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:13:56,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:56,882 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-10-04 12:13:56,882 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:56,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:56,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1014218388, now seen corresponding path program 11 times [2018-10-04 12:13:56,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:56,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:56,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:56,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:13:56,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:57,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:13:57,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:13:57,218 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:13:57,243 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:13:57,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:13:57,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:13:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:58,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:13:58,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-10-04 12:13:58,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:13:58,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:13:58,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=1623, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:13:58,194 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 48 states. [2018-10-04 12:13:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:13:58,454 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2018-10-04 12:13:58,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:13:58,455 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 58 [2018-10-04 12:13:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:13:58,456 INFO L225 Difference]: With dead ends: 70 [2018-10-04 12:13:58,456 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:13:58,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=633, Invalid=1623, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:13:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:13:58,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-10-04 12:13:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:13:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2018-10-04 12:13:58,463 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 58 [2018-10-04 12:13:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:13:58,463 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2018-10-04 12:13:58,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:13:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2018-10-04 12:13:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 12:13:58,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:13:58,464 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-10-04 12:13:58,465 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:13:58,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:13:58,465 INFO L82 PathProgramCache]: Analyzing trace with hash -778386464, now seen corresponding path program 12 times [2018-10-04 12:13:58,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:13:58,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:13:58,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:58,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:13:58,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:13:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:13:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:13:59,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:13:59,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:13:59,129 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:13:59,150 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:13:59,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:13:59,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:00,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:00,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-10-04 12:14:00,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:14:00,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:14:00,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=1914, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:14:00,440 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 52 states. [2018-10-04 12:14:00,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:00,602 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2018-10-04 12:14:00,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:14:00,603 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 63 [2018-10-04 12:14:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:00,604 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:14:00,604 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:14:00,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=738, Invalid=1914, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:14:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:14:00,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-10-04 12:14:00,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:14:00,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2018-10-04 12:14:00,612 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 63 [2018-10-04 12:14:00,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:00,613 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2018-10-04 12:14:00,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:14:00,613 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2018-10-04 12:14:00,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:14:00,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:00,614 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-10-04 12:14:00,615 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:00,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:00,615 INFO L82 PathProgramCache]: Analyzing trace with hash -130045460, now seen corresponding path program 13 times [2018-10-04 12:14:00,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:00,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:00,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:00,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:00,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:00,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:00,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:01,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:14:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:01,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:02,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:02,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-10-04 12:14:02,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:14:02,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:14:02,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=851, Invalid=2229, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:14:02,320 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 56 states. [2018-10-04 12:14:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:02,524 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2018-10-04 12:14:02,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:14:02,525 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 68 [2018-10-04 12:14:02,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:02,525 INFO L225 Difference]: With dead ends: 80 [2018-10-04 12:14:02,526 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 12:14:02,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=851, Invalid=2229, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:14:02,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 12:14:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-10-04 12:14:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 12:14:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2018-10-04 12:14:02,532 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 68 [2018-10-04 12:14:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:02,532 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2018-10-04 12:14:02,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:14:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2018-10-04 12:14:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 12:14:02,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:02,534 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-10-04 12:14:02,534 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:02,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:02,534 INFO L82 PathProgramCache]: Analyzing trace with hash -415978656, now seen corresponding path program 14 times [2018-10-04 12:14:02,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:02,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:02,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:02,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:14:02,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:03,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:03,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:03,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:14:03,196 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:14:03,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:03,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:04,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:04,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-10-04 12:14:04,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:14:04,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:14:04,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=2568, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:14:04,142 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 60 states. [2018-10-04 12:14:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:04,415 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2018-10-04 12:14:04,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:14:04,415 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 73 [2018-10-04 12:14:04,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:04,416 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:14:04,416 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:14:04,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=972, Invalid=2568, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:14:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:14:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-04 12:14:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:14:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2018-10-04 12:14:04,424 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 73 [2018-10-04 12:14:04,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:04,424 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2018-10-04 12:14:04,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:14:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2018-10-04 12:14:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:14:04,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:04,425 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-10-04 12:14:04,425 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:04,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2077592980, now seen corresponding path program 15 times [2018-10-04 12:14:04,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:04,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:04,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:04,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:04,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:05,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:05,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:05,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:14:05,266 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 12:14:05,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:05,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:06,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:06,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-10-04 12:14:06,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:14:06,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:14:06,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1101, Invalid=2931, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:14:06,270 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 64 states. [2018-10-04 12:14:06,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:06,693 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2018-10-04 12:14:06,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:14:06,699 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 78 [2018-10-04 12:14:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:06,700 INFO L225 Difference]: With dead ends: 90 [2018-10-04 12:14:06,700 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 12:14:06,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1101, Invalid=2931, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:14:06,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 12:14:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-10-04 12:14:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 12:14:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2018-10-04 12:14:06,707 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 78 [2018-10-04 12:14:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:06,707 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2018-10-04 12:14:06,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:14:06,708 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2018-10-04 12:14:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 12:14:06,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:06,709 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-10-04 12:14:06,709 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:06,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:06,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1630745312, now seen corresponding path program 16 times [2018-10-04 12:14:06,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:06,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:06,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:06,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:06,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:07,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:07,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:07,268 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:14:07,289 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:14:07,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:07,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:08,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:08,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-10-04 12:14:08,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:14:08,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:14:08,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1238, Invalid=3318, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:14:08,491 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 68 states. [2018-10-04 12:14:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:08,943 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2018-10-04 12:14:08,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:14:08,943 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 83 [2018-10-04 12:14:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:08,945 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:14:08,945 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 12:14:08,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1238, Invalid=3318, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:14:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 12:14:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-10-04 12:14:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 12:14:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2018-10-04 12:14:08,953 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 83 [2018-10-04 12:14:08,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:08,953 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2018-10-04 12:14:08,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:14:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2018-10-04 12:14:08,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 12:14:08,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:08,955 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-10-04 12:14:08,956 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:08,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:08,956 INFO L82 PathProgramCache]: Analyzing trace with hash -778790164, now seen corresponding path program 17 times [2018-10-04 12:14:08,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:08,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:08,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:08,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:08,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:10,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:10,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:10,696 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:14:10,721 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 12:14:10,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:10,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:11,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:11,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-10-04 12:14:11,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:14:11,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:14:11,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=3729, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:14:11,894 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 72 states. [2018-10-04 12:14:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:12,157 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2018-10-04 12:14:12,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:14:12,158 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 88 [2018-10-04 12:14:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:12,158 INFO L225 Difference]: With dead ends: 100 [2018-10-04 12:14:12,158 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 12:14:12,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1383, Invalid=3729, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:14:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 12:14:12,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-10-04 12:14:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 12:14:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2018-10-04 12:14:12,164 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 88 [2018-10-04 12:14:12,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:12,164 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2018-10-04 12:14:12,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:14:12,165 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2018-10-04 12:14:12,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 12:14:12,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:12,166 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-10-04 12:14:12,166 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:12,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:12,166 INFO L82 PathProgramCache]: Analyzing trace with hash 38689376, now seen corresponding path program 18 times [2018-10-04 12:14:12,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:12,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:12,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:12,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:12,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:12,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:12,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:12,814 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:14:12,865 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:14:12,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:12,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:14,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:14,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-10-04 12:14:14,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:14:14,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:14:14,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1536, Invalid=4164, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:14:14,219 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 76 states. [2018-10-04 12:14:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:14,459 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2018-10-04 12:14:14,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:14:14,460 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 93 [2018-10-04 12:14:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:14,461 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:14:14,461 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:14:14,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1536, Invalid=4164, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:14:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:14:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-04 12:14:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 12:14:14,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2018-10-04 12:14:14,465 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 93 [2018-10-04 12:14:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:14,466 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-10-04 12:14:14,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:14:14,466 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2018-10-04 12:14:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:14:14,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:14,467 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-10-04 12:14:14,467 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:14,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash 281420652, now seen corresponding path program 19 times [2018-10-04 12:14:14,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:14,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:14,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:14,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:14,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:15,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:15,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:15,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:14:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:15,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:16,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:16,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2018-10-04 12:14:16,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:14:17,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:14:17,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1697, Invalid=4623, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:14:17,001 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 80 states. [2018-10-04 12:14:17,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:17,359 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2018-10-04 12:14:17,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:14:17,360 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 98 [2018-10-04 12:14:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:17,361 INFO L225 Difference]: With dead ends: 110 [2018-10-04 12:14:17,361 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 12:14:17,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3419 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1697, Invalid=4623, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:14:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 12:14:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-10-04 12:14:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 12:14:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2018-10-04 12:14:17,365 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 98 [2018-10-04 12:14:17,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:17,366 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2018-10-04 12:14:17,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:14:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2018-10-04 12:14:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 12:14:17,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:17,367 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-10-04 12:14:17,367 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:17,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:17,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2025971232, now seen corresponding path program 20 times [2018-10-04 12:14:17,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:17,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:17,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:17,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:14:17,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:18,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:18,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:18,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:14:18,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:14:18,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:18,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:21,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:21,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 83 [2018-10-04 12:14:21,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 12:14:21,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 12:14:21,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1866, Invalid=5106, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:14:21,201 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 84 states. [2018-10-04 12:14:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:21,504 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2018-10-04 12:14:21,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:14:21,506 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 103 [2018-10-04 12:14:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:21,507 INFO L225 Difference]: With dead ends: 115 [2018-10-04 12:14:21,507 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 12:14:21,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1866, Invalid=5106, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:14:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 12:14:21,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-10-04 12:14:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 12:14:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2018-10-04 12:14:21,514 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 103 [2018-10-04 12:14:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:21,514 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2018-10-04 12:14:21,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 12:14:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2018-10-04 12:14:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 12:14:21,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:21,515 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-10-04 12:14:21,516 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:21,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1207497748, now seen corresponding path program 21 times [2018-10-04 12:14:21,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:21,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:21,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:21,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:21,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:22,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:22,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:22,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:14:22,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 12:14:22,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:22,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:23,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:23,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 87 [2018-10-04 12:14:23,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 12:14:23,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 12:14:23,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2043, Invalid=5613, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:14:23,897 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 88 states. [2018-10-04 12:14:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:24,279 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2018-10-04 12:14:24,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:14:24,280 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 108 [2018-10-04 12:14:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:24,281 INFO L225 Difference]: With dead ends: 120 [2018-10-04 12:14:24,281 INFO L226 Difference]: Without dead ends: 118 [2018-10-04 12:14:24,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4178 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2043, Invalid=5613, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:14:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-04 12:14:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-10-04 12:14:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 12:14:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2018-10-04 12:14:24,286 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 108 [2018-10-04 12:14:24,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:24,287 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2018-10-04 12:14:24,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 12:14:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2018-10-04 12:14:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 12:14:24,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:24,288 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-10-04 12:14:24,288 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:24,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:24,288 INFO L82 PathProgramCache]: Analyzing trace with hash 649759072, now seen corresponding path program 22 times [2018-10-04 12:14:24,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:24,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:24,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:24,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:24,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:25,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:25,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:25,296 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:14:25,320 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:14:25,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:25,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:26,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:26,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 91 [2018-10-04 12:14:26,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 12:14:26,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 12:14:26,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2228, Invalid=6144, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:14:26,927 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 92 states. [2018-10-04 12:14:27,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:27,236 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2018-10-04 12:14:27,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:14:27,237 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 113 [2018-10-04 12:14:27,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:27,238 INFO L225 Difference]: With dead ends: 125 [2018-10-04 12:14:27,238 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 12:14:27,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2228, Invalid=6144, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:14:27,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 12:14:27,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-04 12:14:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 12:14:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2018-10-04 12:14:27,245 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 113 [2018-10-04 12:14:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:27,245 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2018-10-04 12:14:27,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 12:14:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2018-10-04 12:14:27,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:14:27,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:27,246 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-10-04 12:14:27,246 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:27,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:27,247 INFO L82 PathProgramCache]: Analyzing trace with hash 60773484, now seen corresponding path program 23 times [2018-10-04 12:14:27,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:27,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:27,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:27,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:27,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:28,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:28,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:28,334 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:14:28,371 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 12:14:28,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:28,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:30,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:30,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2018-10-04 12:14:30,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 12:14:30,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 12:14:30,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2421, Invalid=6699, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:14:30,086 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 96 states. [2018-10-04 12:14:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:30,498 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2018-10-04 12:14:30,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:14:30,498 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 118 [2018-10-04 12:14:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:30,499 INFO L225 Difference]: With dead ends: 130 [2018-10-04 12:14:30,499 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 12:14:30,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5013 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2421, Invalid=6699, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:14:30,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 12:14:30,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-10-04 12:14:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-04 12:14:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2018-10-04 12:14:30,505 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 118 [2018-10-04 12:14:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:30,505 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2018-10-04 12:14:30,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 12:14:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2018-10-04 12:14:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-04 12:14:30,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:30,506 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-10-04 12:14:30,506 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:30,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:30,507 INFO L82 PathProgramCache]: Analyzing trace with hash 293310688, now seen corresponding path program 24 times [2018-10-04 12:14:30,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:30,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:30,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:30,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:30,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:31,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:31,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:31,605 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:14:31,642 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:14:31,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:31,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:33,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:33,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 99 [2018-10-04 12:14:33,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 12:14:33,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 12:14:33,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2622, Invalid=7278, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 12:14:33,411 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 100 states. [2018-10-04 12:14:33,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:33,898 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2018-10-04 12:14:33,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:14:33,899 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 123 [2018-10-04 12:14:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:33,900 INFO L225 Difference]: With dead ends: 135 [2018-10-04 12:14:33,901 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 12:14:33,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2622, Invalid=7278, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 12:14:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 12:14:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-10-04 12:14:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 12:14:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2018-10-04 12:14:33,906 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 123 [2018-10-04 12:14:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:33,907 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2018-10-04 12:14:33,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 12:14:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2018-10-04 12:14:33,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 12:14:33,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:33,908 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-10-04 12:14:33,908 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:33,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1977023724, now seen corresponding path program 25 times [2018-10-04 12:14:33,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:33,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:33,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:33,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:33,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:34,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:34,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:34,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:14:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:34,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:37,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:37,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 103 [2018-10-04 12:14:37,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 12:14:37,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 12:14:37,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2831, Invalid=7881, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:14:37,030 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 104 states. [2018-10-04 12:14:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:37,469 INFO L93 Difference]: Finished difference Result 140 states and 167 transitions. [2018-10-04 12:14:37,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:14:37,469 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 128 [2018-10-04 12:14:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:37,471 INFO L225 Difference]: With dead ends: 140 [2018-10-04 12:14:37,471 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 12:14:37,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5924 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2831, Invalid=7881, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:14:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 12:14:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-10-04 12:14:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-04 12:14:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2018-10-04 12:14:37,477 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 128 [2018-10-04 12:14:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:37,477 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2018-10-04 12:14:37,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 12:14:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2018-10-04 12:14:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-04 12:14:37,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:37,478 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-10-04 12:14:37,479 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:37,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:37,479 INFO L82 PathProgramCache]: Analyzing trace with hash -231131040, now seen corresponding path program 26 times [2018-10-04 12:14:37,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:37,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:37,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:37,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:14:37,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:38,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:38,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:38,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:14:38,821 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:14:38,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:38,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:40,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:40,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 107 [2018-10-04 12:14:40,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 12:14:40,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 12:14:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3048, Invalid=8508, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 12:14:40,746 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand 108 states. [2018-10-04 12:14:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:41,584 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2018-10-04 12:14:41,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:14:41,585 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 133 [2018-10-04 12:14:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:41,586 INFO L225 Difference]: With dead ends: 145 [2018-10-04 12:14:41,586 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 12:14:41,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6408 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3048, Invalid=8508, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 12:14:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 12:14:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-04 12:14:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 12:14:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2018-10-04 12:14:41,593 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 133 [2018-10-04 12:14:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:41,593 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2018-10-04 12:14:41,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 12:14:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2018-10-04 12:14:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 12:14:41,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:41,594 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-10-04 12:14:41,594 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:41,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:41,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1458963820, now seen corresponding path program 27 times [2018-10-04 12:14:41,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:41,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:41,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:41,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:41,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:42,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:42,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:42,863 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:14:42,907 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 12:14:42,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:42,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:45,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:45,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 111 [2018-10-04 12:14:45,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 12:14:45,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 12:14:45,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3273, Invalid=9159, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 12:14:45,649 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 112 states. [2018-10-04 12:14:46,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:46,238 INFO L93 Difference]: Finished difference Result 150 states and 179 transitions. [2018-10-04 12:14:46,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:14:46,239 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 138 [2018-10-04 12:14:46,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:46,240 INFO L225 Difference]: With dead ends: 150 [2018-10-04 12:14:46,240 INFO L226 Difference]: Without dead ends: 148 [2018-10-04 12:14:46,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3273, Invalid=9159, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 12:14:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-04 12:14:46,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-10-04 12:14:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-04 12:14:46,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2018-10-04 12:14:46,246 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 138 [2018-10-04 12:14:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:46,247 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2018-10-04 12:14:46,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 12:14:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2018-10-04 12:14:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-04 12:14:46,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:46,248 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-10-04 12:14:46,248 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:46,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:46,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1839955936, now seen corresponding path program 28 times [2018-10-04 12:14:46,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:46,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:46,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:46,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:46,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:47,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:47,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:47,710 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:14:47,745 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:14:47,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:47,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:50,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:50,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 115 [2018-10-04 12:14:50,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-04 12:14:50,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-04 12:14:50,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3506, Invalid=9834, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 12:14:50,274 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand 116 states. [2018-10-04 12:14:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:50,886 INFO L93 Difference]: Finished difference Result 155 states and 185 transitions. [2018-10-04 12:14:50,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:14:50,887 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 143 [2018-10-04 12:14:50,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:50,888 INFO L225 Difference]: With dead ends: 155 [2018-10-04 12:14:50,888 INFO L226 Difference]: Without dead ends: 153 [2018-10-04 12:14:50,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7433 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3506, Invalid=9834, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 12:14:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-04 12:14:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-10-04 12:14:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 12:14:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2018-10-04 12:14:50,895 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 143 [2018-10-04 12:14:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:50,895 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2018-10-04 12:14:50,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-04 12:14:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2018-10-04 12:14:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 12:14:50,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:50,897 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-10-04 12:14:50,897 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:50,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash 893677036, now seen corresponding path program 29 times [2018-10-04 12:14:50,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:50,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:50,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:50,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:50,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:52,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:52,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:52,901 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:14:52,947 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 12:14:52,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:52,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:14:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:55,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:14:55,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 119 [2018-10-04 12:14:55,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-04 12:14:55,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-04 12:14:55,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3747, Invalid=10533, Unknown=0, NotChecked=0, Total=14280 [2018-10-04 12:14:55,327 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 120 states. [2018-10-04 12:14:55,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:14:55,903 INFO L93 Difference]: Finished difference Result 160 states and 191 transitions. [2018-10-04 12:14:55,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:14:55,904 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 148 [2018-10-04 12:14:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:14:55,904 INFO L225 Difference]: With dead ends: 160 [2018-10-04 12:14:55,905 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 12:14:55,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7974 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3747, Invalid=10533, Unknown=0, NotChecked=0, Total=14280 [2018-10-04 12:14:55,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 12:14:55,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-10-04 12:14:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-04 12:14:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2018-10-04 12:14:55,912 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 148 [2018-10-04 12:14:55,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:14:55,912 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2018-10-04 12:14:55,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-04 12:14:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2018-10-04 12:14:55,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-04 12:14:55,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:14:55,913 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-10-04 12:14:55,914 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:14:55,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:14:55,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1567987872, now seen corresponding path program 30 times [2018-10-04 12:14:55,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:14:55,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:14:55,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:55,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:14:55,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:14:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:14:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:14:57,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:14:57,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:14:57,517 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:14:57,568 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:14:57,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:14:57,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:15:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:00,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:15:00,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 123 [2018-10-04 12:15:00,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-04 12:15:00,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-04 12:15:00,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3996, Invalid=11256, Unknown=0, NotChecked=0, Total=15252 [2018-10-04 12:15:00,063 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 124 states. [2018-10-04 12:15:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:15:00,601 INFO L93 Difference]: Finished difference Result 165 states and 197 transitions. [2018-10-04 12:15:00,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:15:00,602 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 153 [2018-10-04 12:15:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:15:00,603 INFO L225 Difference]: With dead ends: 165 [2018-10-04 12:15:00,603 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 12:15:00,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8534 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3996, Invalid=11256, Unknown=0, NotChecked=0, Total=15252 [2018-10-04 12:15:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 12:15:00,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-04 12:15:00,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 12:15:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2018-10-04 12:15:00,611 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 153 [2018-10-04 12:15:00,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:15:00,612 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2018-10-04 12:15:00,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-04 12:15:00,612 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2018-10-04 12:15:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 12:15:00,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:15:00,613 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-10-04 12:15:00,613 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:15:00,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:15:00,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1695168108, now seen corresponding path program 31 times [2018-10-04 12:15:00,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:15:00,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:15:00,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:00,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:15:00,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:15:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:02,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:15:02,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:15:02,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:15:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:15:02,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:15:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:05,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:15:05,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 127 [2018-10-04 12:15:05,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-04 12:15:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-04 12:15:05,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4253, Invalid=12003, Unknown=0, NotChecked=0, Total=16256 [2018-10-04 12:15:05,274 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand 128 states. [2018-10-04 12:15:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:15:05,816 INFO L93 Difference]: Finished difference Result 170 states and 203 transitions. [2018-10-04 12:15:05,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:15:05,816 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 158 [2018-10-04 12:15:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:15:05,817 INFO L225 Difference]: With dead ends: 170 [2018-10-04 12:15:05,817 INFO L226 Difference]: Without dead ends: 168 [2018-10-04 12:15:05,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9113 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4253, Invalid=12003, Unknown=0, NotChecked=0, Total=16256 [2018-10-04 12:15:05,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-04 12:15:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-10-04 12:15:05,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 12:15:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2018-10-04 12:15:05,825 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 158 [2018-10-04 12:15:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:15:05,825 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2018-10-04 12:15:05,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-04 12:15:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2018-10-04 12:15:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 12:15:05,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:15:05,826 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-10-04 12:15:05,826 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:15:05,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:15:05,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1450316064, now seen corresponding path program 32 times [2018-10-04 12:15:05,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:15:05,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:15:05,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:05,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:15:05,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:15:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:08,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:15:08,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:15:08,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:15:08,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:15:08,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:15:08,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:15:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:11,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:15:11,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 131 [2018-10-04 12:15:11,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-04 12:15:11,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-04 12:15:11,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4518, Invalid=12774, Unknown=0, NotChecked=0, Total=17292 [2018-10-04 12:15:11,049 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 132 states. [2018-10-04 12:15:11,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:15:11,696 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2018-10-04 12:15:11,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:15:11,697 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 163 [2018-10-04 12:15:11,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:15:11,698 INFO L225 Difference]: With dead ends: 175 [2018-10-04 12:15:11,698 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 12:15:11,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9711 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4518, Invalid=12774, Unknown=0, NotChecked=0, Total=17292 [2018-10-04 12:15:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 12:15:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-10-04 12:15:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 12:15:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2018-10-04 12:15:11,706 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 163 [2018-10-04 12:15:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:15:11,706 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2018-10-04 12:15:11,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-04 12:15:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2018-10-04 12:15:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 12:15:11,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:15:11,708 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-10-04 12:15:11,708 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:15:11,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:15:11,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2138087700, now seen corresponding path program 33 times [2018-10-04 12:15:11,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:15:11,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:15:11,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:11,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:15:11,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:15:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:13,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:15:13,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:15:13,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:15:14,052 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 12:15:14,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:15:14,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:15:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:17,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:15:17,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 135 [2018-10-04 12:15:17,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-04 12:15:17,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-04 12:15:17,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4791, Invalid=13569, Unknown=0, NotChecked=0, Total=18360 [2018-10-04 12:15:17,291 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 136 states. [2018-10-04 12:15:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:15:17,890 INFO L93 Difference]: Finished difference Result 180 states and 215 transitions. [2018-10-04 12:15:17,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:15:17,891 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 168 [2018-10-04 12:15:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:15:17,892 INFO L225 Difference]: With dead ends: 180 [2018-10-04 12:15:17,892 INFO L226 Difference]: Without dead ends: 178 [2018-10-04 12:15:17,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10328 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4791, Invalid=13569, Unknown=0, NotChecked=0, Total=18360 [2018-10-04 12:15:17,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-04 12:15:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-10-04 12:15:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-04 12:15:17,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2018-10-04 12:15:17,898 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 168 [2018-10-04 12:15:17,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:15:17,899 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2018-10-04 12:15:17,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-04 12:15:17,899 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2018-10-04 12:15:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-04 12:15:17,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:15:17,900 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-10-04 12:15:17,900 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:15:17,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:15:17,900 INFO L82 PathProgramCache]: Analyzing trace with hash 359536224, now seen corresponding path program 34 times [2018-10-04 12:15:17,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:15:17,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:15:17,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:17,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:15:17,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:15:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:20,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:15:20,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:15:20,810 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:15:20,852 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:15:20,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:15:20,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:15:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:25,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:15:25,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 139 [2018-10-04 12:15:25,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-04 12:15:25,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-04 12:15:25,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5072, Invalid=14388, Unknown=0, NotChecked=0, Total=19460 [2018-10-04 12:15:25,116 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand 140 states. [2018-10-04 12:15:25,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:15:25,883 INFO L93 Difference]: Finished difference Result 185 states and 221 transitions. [2018-10-04 12:15:25,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:15:25,884 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 173 [2018-10-04 12:15:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:15:25,885 INFO L225 Difference]: With dead ends: 185 [2018-10-04 12:15:25,885 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 12:15:25,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10964 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5072, Invalid=14388, Unknown=0, NotChecked=0, Total=19460 [2018-10-04 12:15:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 12:15:25,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-10-04 12:15:25,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-04 12:15:25,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2018-10-04 12:15:25,892 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 173 [2018-10-04 12:15:25,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:15:25,892 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2018-10-04 12:15:25,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-04 12:15:25,893 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2018-10-04 12:15:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 12:15:25,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:15:25,894 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-10-04 12:15:25,894 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:15:25,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:15:25,894 INFO L82 PathProgramCache]: Analyzing trace with hash -400824468, now seen corresponding path program 35 times [2018-10-04 12:15:25,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:15:25,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:15:25,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:25,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:15:25,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:15:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:28,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:15:28,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:15:28,710 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:15:28,778 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 12:15:28,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:15:28,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:15:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:32,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:15:32,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 143 [2018-10-04 12:15:32,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-04 12:15:32,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-04 12:15:32,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5361, Invalid=15231, Unknown=0, NotChecked=0, Total=20592 [2018-10-04 12:15:32,086 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 144 states. [2018-10-04 12:15:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:15:32,815 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2018-10-04 12:15:32,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:15:32,815 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 178 [2018-10-04 12:15:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:15:32,817 INFO L225 Difference]: With dead ends: 190 [2018-10-04 12:15:32,817 INFO L226 Difference]: Without dead ends: 188 [2018-10-04 12:15:32,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11619 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5361, Invalid=15231, Unknown=0, NotChecked=0, Total=20592 [2018-10-04 12:15:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-10-04 12:15:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-10-04 12:15:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-04 12:15:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2018-10-04 12:15:32,823 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 178 [2018-10-04 12:15:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:15:32,824 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2018-10-04 12:15:32,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-04 12:15:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2018-10-04 12:15:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-04 12:15:32,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:15:32,825 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-10-04 12:15:32,825 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:15:32,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:15:32,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1927470560, now seen corresponding path program 36 times [2018-10-04 12:15:32,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:15:32,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:15:32,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:32,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:15:32,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:15:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:34,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:15:34,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:15:34,902 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:15:34,965 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:15:34,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:15:34,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:15:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:39,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:15:39,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 147 [2018-10-04 12:15:39,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-04 12:15:39,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-04 12:15:39,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5658, Invalid=16098, Unknown=0, NotChecked=0, Total=21756 [2018-10-04 12:15:39,208 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 148 states. [2018-10-04 12:15:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:15:39,818 INFO L93 Difference]: Finished difference Result 195 states and 233 transitions. [2018-10-04 12:15:39,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:15:39,819 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 183 [2018-10-04 12:15:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:15:39,820 INFO L225 Difference]: With dead ends: 195 [2018-10-04 12:15:39,820 INFO L226 Difference]: Without dead ends: 193 [2018-10-04 12:15:39,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12293 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5658, Invalid=16098, Unknown=0, NotChecked=0, Total=21756 [2018-10-04 12:15:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-04 12:15:39,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-10-04 12:15:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 12:15:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2018-10-04 12:15:39,828 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 183 [2018-10-04 12:15:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:15:39,828 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2018-10-04 12:15:39,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-04 12:15:39,829 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2018-10-04 12:15:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 12:15:39,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:15:39,830 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-10-04 12:15:39,830 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:15:39,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:15:39,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1106759660, now seen corresponding path program 37 times [2018-10-04 12:15:39,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:15:39,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:15:39,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:39,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:15:39,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:15:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:44,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:15:44,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:15:44,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:15:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:15:44,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:15:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:48,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:15:48,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 151 [2018-10-04 12:15:48,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-04 12:15:48,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-04 12:15:48,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5963, Invalid=16989, Unknown=0, NotChecked=0, Total=22952 [2018-10-04 12:15:48,234 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand 152 states. [2018-10-04 12:15:48,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:15:48,972 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2018-10-04 12:15:48,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:15:48,972 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 188 [2018-10-04 12:15:48,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:15:48,973 INFO L225 Difference]: With dead ends: 200 [2018-10-04 12:15:48,973 INFO L226 Difference]: Without dead ends: 198 [2018-10-04 12:15:48,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12986 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=5963, Invalid=16989, Unknown=0, NotChecked=0, Total=22952 [2018-10-04 12:15:48,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-04 12:15:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-10-04 12:15:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-04 12:15:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2018-10-04 12:15:48,982 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 188 [2018-10-04 12:15:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:15:48,982 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2018-10-04 12:15:48,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-04 12:15:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2018-10-04 12:15:48,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-04 12:15:48,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:15:48,984 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-10-04 12:15:48,984 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:15:48,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:15:48,984 INFO L82 PathProgramCache]: Analyzing trace with hash -928758432, now seen corresponding path program 38 times [2018-10-04 12:15:48,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:15:48,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:15:48,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:48,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:15:48,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:15:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:51,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:15:51,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:15:51,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:15:52,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:15:52,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:15:52,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:15:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:55,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:15:55,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 155 [2018-10-04 12:15:55,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-04 12:15:55,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-04 12:15:55,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6276, Invalid=17904, Unknown=0, NotChecked=0, Total=24180 [2018-10-04 12:15:55,994 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand 156 states. [2018-10-04 12:15:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:15:56,740 INFO L93 Difference]: Finished difference Result 205 states and 245 transitions. [2018-10-04 12:15:56,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:15:56,741 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 193 [2018-10-04 12:15:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:15:56,742 INFO L225 Difference]: With dead ends: 205 [2018-10-04 12:15:56,742 INFO L226 Difference]: Without dead ends: 203 [2018-10-04 12:15:56,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13698 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6276, Invalid=17904, Unknown=0, NotChecked=0, Total=24180 [2018-10-04 12:15:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-04 12:15:56,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-10-04 12:15:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-04 12:15:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2018-10-04 12:15:56,751 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 193 [2018-10-04 12:15:56,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:15:56,752 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2018-10-04 12:15:56,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-04 12:15:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2018-10-04 12:15:56,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-04 12:15:56,753 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:15:56,753 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-10-04 12:15:56,753 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:15:56,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:15:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash -93644692, now seen corresponding path program 39 times [2018-10-04 12:15:56,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:15:56,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:15:56,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:56,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:15:56,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:15:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:15:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:15:59,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:15:59,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:15:59,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:15:59,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 12:15:59,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:15:59,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:16:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:04,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:16:04,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 159 [2018-10-04 12:16:04,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-04 12:16:04,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-04 12:16:04,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6597, Invalid=18843, Unknown=0, NotChecked=0, Total=25440 [2018-10-04 12:16:04,187 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand 160 states. [2018-10-04 12:16:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:16:04,964 INFO L93 Difference]: Finished difference Result 210 states and 251 transitions. [2018-10-04 12:16:04,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:16:04,964 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 198 [2018-10-04 12:16:04,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:16:04,965 INFO L225 Difference]: With dead ends: 210 [2018-10-04 12:16:04,965 INFO L226 Difference]: Without dead ends: 208 [2018-10-04 12:16:04,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14429 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=6597, Invalid=18843, Unknown=0, NotChecked=0, Total=25440 [2018-10-04 12:16:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-04 12:16:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-10-04 12:16:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-10-04 12:16:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 244 transitions. [2018-10-04 12:16:04,971 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 244 transitions. Word has length 198 [2018-10-04 12:16:04,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:16:04,971 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 244 transitions. [2018-10-04 12:16:04,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-04 12:16:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 244 transitions. [2018-10-04 12:16:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-04 12:16:04,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:16:04,972 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-10-04 12:16:04,972 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:16:04,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:16:04,973 INFO L82 PathProgramCache]: Analyzing trace with hash 392842464, now seen corresponding path program 40 times [2018-10-04 12:16:04,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:16:04,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:16:04,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:16:04,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:16:04,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:16:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:16:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:08,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:16:08,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:16:08,558 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:16:08,604 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:16:08,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:16:08,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:16:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:12,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:16:12,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 163 [2018-10-04 12:16:12,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-10-04 12:16:12,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-10-04 12:16:12,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6926, Invalid=19806, Unknown=0, NotChecked=0, Total=26732 [2018-10-04 12:16:12,643 INFO L87 Difference]: Start difference. First operand 204 states and 244 transitions. Second operand 164 states. [2018-10-04 12:16:13,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:16:13,605 INFO L93 Difference]: Finished difference Result 215 states and 257 transitions. [2018-10-04 12:16:13,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:16:13,605 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 203 [2018-10-04 12:16:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:16:13,607 INFO L225 Difference]: With dead ends: 215 [2018-10-04 12:16:13,607 INFO L226 Difference]: Without dead ends: 213 [2018-10-04 12:16:13,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15179 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=6926, Invalid=19806, Unknown=0, NotChecked=0, Total=26732 [2018-10-04 12:16:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-04 12:16:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-10-04 12:16:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-04 12:16:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 250 transitions. [2018-10-04 12:16:13,613 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 250 transitions. Word has length 203 [2018-10-04 12:16:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:16:13,613 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 250 transitions. [2018-10-04 12:16:13,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-10-04 12:16:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 250 transitions. [2018-10-04 12:16:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-04 12:16:13,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:16:13,614 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-10-04 12:16:13,615 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:16:13,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:16:13,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1010974484, now seen corresponding path program 41 times [2018-10-04 12:16:13,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:16:13,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:16:13,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:16:13,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:16:13,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:16:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:16:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:17,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:16:17,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:16:17,299 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:16:17,516 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 12:16:17,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:16:17,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:16:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:24,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:16:24,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 167 [2018-10-04 12:16:24,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-10-04 12:16:24,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-10-04 12:16:24,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7263, Invalid=20793, Unknown=0, NotChecked=0, Total=28056 [2018-10-04 12:16:24,464 INFO L87 Difference]: Start difference. First operand 209 states and 250 transitions. Second operand 168 states. [2018-10-04 12:16:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:16:25,336 INFO L93 Difference]: Finished difference Result 220 states and 263 transitions. [2018-10-04 12:16:25,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 12:16:25,336 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 208 [2018-10-04 12:16:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:16:25,337 INFO L225 Difference]: With dead ends: 220 [2018-10-04 12:16:25,337 INFO L226 Difference]: Without dead ends: 218 [2018-10-04 12:16:25,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15948 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=7263, Invalid=20793, Unknown=0, NotChecked=0, Total=28056 [2018-10-04 12:16:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-04 12:16:25,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-10-04 12:16:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-04 12:16:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 256 transitions. [2018-10-04 12:16:25,345 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 256 transitions. Word has length 208 [2018-10-04 12:16:25,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:16:25,345 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 256 transitions. [2018-10-04 12:16:25,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-10-04 12:16:25,346 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 256 transitions. [2018-10-04 12:16:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-04 12:16:25,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:16:25,347 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-10-04 12:16:25,347 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:16:25,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:16:25,347 INFO L82 PathProgramCache]: Analyzing trace with hash -638782368, now seen corresponding path program 42 times [2018-10-04 12:16:25,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:16:25,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:16:25,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:16:25,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:16:25,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:16:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:16:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:27,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:16:27,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:16:27,892 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:16:27,966 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 12:16:27,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:16:27,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:16:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:32,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:16:32,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 171 [2018-10-04 12:16:32,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-10-04 12:16:32,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-10-04 12:16:32,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7608, Invalid=21804, Unknown=0, NotChecked=0, Total=29412 [2018-10-04 12:16:32,713 INFO L87 Difference]: Start difference. First operand 214 states and 256 transitions. Second operand 172 states. [2018-10-04 12:16:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:16:33,532 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2018-10-04 12:16:33,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 12:16:33,532 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 213 [2018-10-04 12:16:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:16:33,533 INFO L225 Difference]: With dead ends: 225 [2018-10-04 12:16:33,534 INFO L226 Difference]: Without dead ends: 223 [2018-10-04 12:16:33,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16736 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=7608, Invalid=21804, Unknown=0, NotChecked=0, Total=29412 [2018-10-04 12:16:33,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-04 12:16:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-10-04 12:16:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-04 12:16:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 262 transitions. [2018-10-04 12:16:33,539 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 262 transitions. Word has length 213 [2018-10-04 12:16:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:16:33,540 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 262 transitions. [2018-10-04 12:16:33,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-10-04 12:16:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 262 transitions. [2018-10-04 12:16:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-04 12:16:33,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:16:33,541 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-10-04 12:16:33,541 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:16:33,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:16:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash 372754796, now seen corresponding path program 43 times [2018-10-04 12:16:33,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:16:33,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:16:33,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:16:33,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:16:33,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:16:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:16:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:36,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:16:36,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:16:36,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:16:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:16:36,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:16:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:41,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:16:41,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 175 [2018-10-04 12:16:41,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-10-04 12:16:41,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-10-04 12:16:41,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7961, Invalid=22839, Unknown=0, NotChecked=0, Total=30800 [2018-10-04 12:16:41,153 INFO L87 Difference]: Start difference. First operand 219 states and 262 transitions. Second operand 176 states. [2018-10-04 12:16:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:16:42,048 INFO L93 Difference]: Finished difference Result 230 states and 275 transitions. [2018-10-04 12:16:42,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 12:16:42,048 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 218 [2018-10-04 12:16:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:16:42,050 INFO L225 Difference]: With dead ends: 230 [2018-10-04 12:16:42,050 INFO L226 Difference]: Without dead ends: 228 [2018-10-04 12:16:42,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17543 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=7961, Invalid=22839, Unknown=0, NotChecked=0, Total=30800 [2018-10-04 12:16:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-04 12:16:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-10-04 12:16:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-04 12:16:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 268 transitions. [2018-10-04 12:16:42,056 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 268 transitions. Word has length 218 [2018-10-04 12:16:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:16:42,056 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 268 transitions. [2018-10-04 12:16:42,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-10-04 12:16:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 268 transitions. [2018-10-04 12:16:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-04 12:16:42,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:16:42,057 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-10-04 12:16:42,057 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:16:42,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:16:42,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2065417248, now seen corresponding path program 44 times [2018-10-04 12:16:42,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:16:42,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:16:42,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:16:42,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:16:42,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:16:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:16:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:45,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:16:45,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:16:45,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:16:45,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:16:45,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:16:45,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:16:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:50,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:16:50,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 179 [2018-10-04 12:16:50,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-10-04 12:16:50,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-10-04 12:16:50,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8322, Invalid=23898, Unknown=0, NotChecked=0, Total=32220 [2018-10-04 12:16:50,210 INFO L87 Difference]: Start difference. First operand 224 states and 268 transitions. Second operand 180 states. [2018-10-04 12:16:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:16:51,227 INFO L93 Difference]: Finished difference Result 235 states and 281 transitions. [2018-10-04 12:16:51,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 12:16:51,227 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 223 [2018-10-04 12:16:51,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:16:51,229 INFO L225 Difference]: With dead ends: 235 [2018-10-04 12:16:51,229 INFO L226 Difference]: Without dead ends: 233 [2018-10-04 12:16:51,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18369 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=8322, Invalid=23898, Unknown=0, NotChecked=0, Total=32220 [2018-10-04 12:16:51,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-04 12:16:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-10-04 12:16:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-04 12:16:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2018-10-04 12:16:51,237 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 223 [2018-10-04 12:16:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:16:51,238 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2018-10-04 12:16:51,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-10-04 12:16:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2018-10-04 12:16:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-04 12:16:51,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:16:51,239 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-10-04 12:16:51,239 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:16:51,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:16:51,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1340001812, now seen corresponding path program 45 times [2018-10-04 12:16:51,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:16:51,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:16:51,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:16:51,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:16:51,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:16:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:16:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:54,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:16:54,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:16:54,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:16:54,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 12:16:54,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:16:54,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:16:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:16:59,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:16:59,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 183 [2018-10-04 12:16:59,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-10-04 12:16:59,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-10-04 12:16:59,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8691, Invalid=24981, Unknown=0, NotChecked=0, Total=33672 [2018-10-04 12:16:59,685 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand 184 states. [2018-10-04 12:17:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:00,583 INFO L93 Difference]: Finished difference Result 240 states and 287 transitions. [2018-10-04 12:17:00,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 12:17:00,584 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 228 [2018-10-04 12:17:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:00,585 INFO L225 Difference]: With dead ends: 240 [2018-10-04 12:17:00,585 INFO L226 Difference]: Without dead ends: 238 [2018-10-04 12:17:00,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19214 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=8691, Invalid=24981, Unknown=0, NotChecked=0, Total=33672 [2018-10-04 12:17:00,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-10-04 12:17:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-10-04 12:17:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-10-04 12:17:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2018-10-04 12:17:00,592 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 228 [2018-10-04 12:17:00,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:00,593 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2018-10-04 12:17:00,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-10-04 12:17:00,593 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2018-10-04 12:17:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-04 12:17:00,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:00,594 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-10-04 12:17:00,594 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:00,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:00,595 INFO L82 PathProgramCache]: Analyzing trace with hash 117973856, now seen corresponding path program 46 times [2018-10-04 12:17:00,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:00,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:00,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:00,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:00,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:03,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:03,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:17:03,772 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:17:03,844 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:17:03,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:03,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:09,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:09,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 187 [2018-10-04 12:17:09,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-10-04 12:17:09,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-10-04 12:17:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9068, Invalid=26088, Unknown=0, NotChecked=0, Total=35156 [2018-10-04 12:17:09,914 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand 188 states. [2018-10-04 12:17:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:10,985 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2018-10-04 12:17:10,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 12:17:10,985 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 233 [2018-10-04 12:17:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:10,986 INFO L225 Difference]: With dead ends: 245 [2018-10-04 12:17:10,987 INFO L226 Difference]: Without dead ends: 243 [2018-10-04 12:17:10,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20078 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=9068, Invalid=26088, Unknown=0, NotChecked=0, Total=35156 [2018-10-04 12:17:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-04 12:17:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-10-04 12:17:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-04 12:17:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 286 transitions. [2018-10-04 12:17:10,995 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 286 transitions. Word has length 233 [2018-10-04 12:17:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:10,995 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 286 transitions. [2018-10-04 12:17:10,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-10-04 12:17:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 286 transitions. [2018-10-04 12:17:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-04 12:17:10,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:10,997 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-10-04 12:17:10,997 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:10,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:10,997 INFO L82 PathProgramCache]: Analyzing trace with hash 365034092, now seen corresponding path program 47 times [2018-10-04 12:17:10,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:10,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:10,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:10,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:10,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:14,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:14,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:17:14,251 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:17:14,367 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 12:17:14,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:14,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:20,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:20,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 191 [2018-10-04 12:17:20,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-10-04 12:17:20,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-10-04 12:17:20,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=27219, Unknown=0, NotChecked=0, Total=36672 [2018-10-04 12:17:20,295 INFO L87 Difference]: Start difference. First operand 239 states and 286 transitions. Second operand 192 states. [2018-10-04 12:17:21,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:21,383 INFO L93 Difference]: Finished difference Result 250 states and 299 transitions. [2018-10-04 12:17:21,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 12:17:21,384 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 238 [2018-10-04 12:17:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:21,385 INFO L225 Difference]: With dead ends: 250 [2018-10-04 12:17:21,385 INFO L226 Difference]: Without dead ends: 248 [2018-10-04 12:17:21,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20961 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=9453, Invalid=27219, Unknown=0, NotChecked=0, Total=36672 [2018-10-04 12:17:21,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-04 12:17:21,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-10-04 12:17:21,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-04 12:17:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 292 transitions. [2018-10-04 12:17:21,394 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 292 transitions. Word has length 238 [2018-10-04 12:17:21,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:21,394 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 292 transitions. [2018-10-04 12:17:21,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-10-04 12:17:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 292 transitions. [2018-10-04 12:17:21,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-04 12:17:21,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:21,396 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-10-04 12:17:21,396 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:21,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:21,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1225829088, now seen corresponding path program 48 times [2018-10-04 12:17:21,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:21,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:21,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:21,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:21,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:24,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:24,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:17:24,788 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:17:24,891 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 12:17:24,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:24,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:30,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:30,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 195 [2018-10-04 12:17:30,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-10-04 12:17:30,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-10-04 12:17:30,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9846, Invalid=28374, Unknown=0, NotChecked=0, Total=38220 [2018-10-04 12:17:30,922 INFO L87 Difference]: Start difference. First operand 244 states and 292 transitions. Second operand 196 states. [2018-10-04 12:17:32,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:32,023 INFO L93 Difference]: Finished difference Result 255 states and 305 transitions. [2018-10-04 12:17:32,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 12:17:32,024 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 243 [2018-10-04 12:17:32,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:32,025 INFO L225 Difference]: With dead ends: 255 [2018-10-04 12:17:32,025 INFO L226 Difference]: Without dead ends: 253 [2018-10-04 12:17:32,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21863 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=9846, Invalid=28374, Unknown=0, NotChecked=0, Total=38220 [2018-10-04 12:17:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-10-04 12:17:32,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-10-04 12:17:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-10-04 12:17:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2018-10-04 12:17:32,034 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 243 [2018-10-04 12:17:32,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:32,035 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2018-10-04 12:17:32,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-10-04 12:17:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2018-10-04 12:17:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-04 12:17:32,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:32,036 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-10-04 12:17:32,036 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:32,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash 291644140, now seen corresponding path program 49 times [2018-10-04 12:17:32,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:32,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:32,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:32,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:32,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:35,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:35,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:17:35,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:17:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:35,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-04 12:17:40,500 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-04 12:17:40,701 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:17:40,702 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:17:40,707 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:17:40,707 INFO L202 PluginConnector]: Adding new model GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:17:40 BoogieIcfgContainer [2018-10-04 12:17:40,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:17:40,708 INFO L168 Benchmark]: Toolchain (without parser) took 236435.09 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 80.7 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 354.9 MB). Peak memory consumption was 435.6 MB. Max. memory is 7.1 GB. [2018-10-04 12:17:40,709 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 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. [2018-10-04 12:17:40,709 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.94 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. [2018-10-04 12:17:40,710 INFO L168 Benchmark]: Boogie Preprocessor took 24.62 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. [2018-10-04 12:17:40,710 INFO L168 Benchmark]: RCFGBuilder took 370.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:17:40,711 INFO L168 Benchmark]: TraceAbstraction took 235991.72 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 80.7 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 333.7 MB). Peak memory consumption was 414.5 MB. Max. memory is 7.1 GB. [2018-10-04 12:17:40,714 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 0.23 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 Procedure Inliner took 43.94 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 24.62 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 370.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235991.72 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 80.7 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 333.7 MB). Peak memory consumption was 414.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 44). Cancelled while BasicCegarLoop was analyzing trace of length 249 with TraceHistMax 49, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 187 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 235.9s OverallTime, 51 OverallIterations, 49 TraceHistogramMax, 25.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 505 SDtfs, 16680 SDslu, 14594 SDs, 0 SdLazy, 14845 SolverSat, 3065 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8428 GetRequests, 3626 SyntacticMatches, 0 SemanticMatches, 4802 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360592 ImplicationChecksByTransitivity, 186.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=249occurred in iteration=50, 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: 0.3s AutomataMinimizationTime, 50 MinimizatonAttempts, 197 StatesRemovedByMinimization, 49 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 195.6s InterpolantComputationTime, 12059 NumberOfCodeBlocks, 12059 NumberOfCodeBlocksAsserted, 730 NumberOfCheckSat, 11961 ConstructedInterpolants, 5928 QuantifiedInterpolants, 19180285 SizeOfPredicates, 1320 NumberOfNonLiveVariables, 10176 ConjunctsInSsa, 2544 ConjunctsInUnsatCore, 98 InterpolantComputations, 2 PerfectInterpolantSequences, 1/186593 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/GateController.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-17-40-727.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/GateController.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-17-40-727.csv Completed graceful shutdown