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/RailwayCrossing.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:34:43,907 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:34:43,909 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:34:43,926 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:34:43,927 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:34:43,928 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:34:43,929 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:34:43,931 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:34:43,933 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:34:43,934 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:34:43,935 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-03 08:34:43,959 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 [2018-10-03 08:34:43,974 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:34:43,975 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:34:43,975 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:34:43,976 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:34:43,976 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:34:43,977 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:34:43,977 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:34:43,977 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:34:43,977 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:34:43,977 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:34:43,978 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:34:43,978 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:34:43,978 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:34:43,978 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:34:43,978 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:34:43,979 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:34:43,979 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:34:43,979 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:34:43,979 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:34:43,979 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:34:43,979 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:34:43,980 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:34:43,980 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:34:43,980 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:34:43,980 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:34:43,980 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:34:43,981 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:34:43,981 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:34:43,981 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:34:43,981 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:34:44,031 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:34:44,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:34:44,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:34:44,050 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:34:44,050 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:34:44,051 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl [2018-10-03 08:34:44,051 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl' [2018-10-03 08:34:44,100 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:34:44,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:34:44,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:34:44,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:34:44,105 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:34:44,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:34:44" (1/1) ... [2018-10-03 08:34:44,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:34:44" (1/1) ... [2018-10-03 08:34:44,147 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 08:34:44,148 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 08:34:44,148 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 08:34:44,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:34:44,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:34:44,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:34:44,152 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:34:44,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:34:44" (1/1) ... [2018-10-03 08:34:44,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:34:44" (1/1) ... [2018-10-03 08:34:44,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:34:44" (1/1) ... [2018-10-03 08:34:44,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:34:44" (1/1) ... [2018-10-03 08:34:44,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:34:44" (1/1) ... [2018-10-03 08:34:44,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:34:44" (1/1) ... [2018-10-03 08:34:44,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:34:44" (1/1) ... [2018-10-03 08:34:44,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:34:44,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:34:44,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:34:44,181 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:34:44,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:34:44" (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 [2018-10-03 08:34:44,251 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-10-03 08:34:44,251 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-10-03 08:34:44,252 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-10-03 08:34:44,556 INFO L337 CfgBuilder]: Using library mode [2018-10-03 08:34:44,556 INFO L202 PluginConnector]: Adding new model RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:34:44 BoogieIcfgContainer [2018-10-03 08:34:44,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:34:44,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:34:44,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:34:44,562 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:34:44,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:34:44" (1/2) ... [2018-10-03 08:34:44,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2352797 and model type RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:34:44, skipping insertion in model container [2018-10-03 08:34:44,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:34:44" (2/2) ... [2018-10-03 08:34:44,566 INFO L112 eAbstractionObserver]: Analyzing ICFG RailwayCrossing.bpl [2018-10-03 08:34:44,577 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:34:44,585 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:34:44,642 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:34:44,643 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:34:44,643 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:34:44,644 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:34:44,644 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:34:44,644 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:34:44,647 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:34:44,648 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:34:44,648 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:34:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-10-03 08:34:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-03 08:34:44,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:44,687 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-03 08:34:44,690 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:44,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:44,697 INFO L82 PathProgramCache]: Analyzing trace with hash 30496, now seen corresponding path program 1 times [2018-10-03 08:34:44,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:44,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:44,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:44,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:34:44,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:44,893 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:34:44,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:34:44,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:34:44,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:34:44,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:34:44,918 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-10-03 08:34:45,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:45,065 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-10-03 08:34:45,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:34:45,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-03 08:34:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:45,084 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:34:45,085 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:34:45,090 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 [2018-10-03 08:34:45,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:34:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-10-03 08:34:45,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:34:45,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2018-10-03 08:34:45,137 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 3 [2018-10-03 08:34:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:45,137 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2018-10-03 08:34:45,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:34:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2018-10-03 08:34:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:34:45,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:45,138 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:34:45,139 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:45,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:45,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1863215691, now seen corresponding path program 1 times [2018-10-03 08:34:45,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:45,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:45,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:45,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:34:45,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:45,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:34:45,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:34:45,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:34:45,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:34:45,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:34:45,200 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand 3 states. [2018-10-03 08:34:45,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:45,238 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2018-10-03 08:34:45,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:34:45,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-03 08:34:45,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:45,239 INFO L225 Difference]: With dead ends: 16 [2018-10-03 08:34:45,240 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:34:45,241 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 [2018-10-03 08:34:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:34:45,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:34:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:34:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-10-03 08:34:45,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2018-10-03 08:34:45,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:45,244 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-10-03 08:34:45,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:34:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-10-03 08:34:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:34:45,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:45,245 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:34:45,245 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:45,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:45,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1926837521, now seen corresponding path program 1 times [2018-10-03 08:34:45,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:45,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:45,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:45,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:34:45,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:45,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:45,392 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 [2018-10-03 08:34:45,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:34:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:45,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:45,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:45,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2018-10-03 08:34:45,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:34:45,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:34:45,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:34:45,667 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 6 states. [2018-10-03 08:34:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:45,716 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-10-03 08:34:45,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:34:45,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-10-03 08:34:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:45,719 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:34:45,719 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 08:34:45,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:34:45,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 08:34:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-10-03 08:34:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:34:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-10-03 08:34:45,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-10-03 08:34:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:45,729 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-10-03 08:34:45,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:34:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-10-03 08:34:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:34:45,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:45,731 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-10-03 08:34:45,732 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:45,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash 640583104, now seen corresponding path program 2 times [2018-10-03 08:34:45,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:45,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:45,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:45,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:34:45,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:45,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:45,856 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 [2018-10-03 08:34:45,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:34:45,890 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:34:45,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:45,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:46,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:46,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-10-03 08:34:46,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:34:46,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:34:46,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:34:46,325 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 8 states. [2018-10-03 08:34:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:46,418 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2018-10-03 08:34:46,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:34:46,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:34:46,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:46,420 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:34:46,420 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:34:46,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:34:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:34:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-03 08:34:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:34:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-10-03 08:34:46,428 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 13 [2018-10-03 08:34:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:46,428 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-10-03 08:34:46,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:34:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2018-10-03 08:34:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:34:46,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:46,429 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-10-03 08:34:46,430 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:46,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:46,430 INFO L82 PathProgramCache]: Analyzing trace with hash -297055631, now seen corresponding path program 3 times [2018-10-03 08:34:46,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:46,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:46,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:46,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:34:46,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:46,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:46,554 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 [2018-10-03 08:34:46,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:34:46,578 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 08:34:46,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:46,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:46,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:46,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-03 08:34:46,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:34:46,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:34:46,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:34:46,849 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 10 states. [2018-10-03 08:34:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:46,895 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2018-10-03 08:34:46,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:34:46,896 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-03 08:34:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:46,897 INFO L225 Difference]: With dead ends: 30 [2018-10-03 08:34:46,897 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 08:34:46,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:34:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 08:34:46,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-10-03 08:34:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:34:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2018-10-03 08:34:46,903 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 18 [2018-10-03 08:34:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:46,903 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2018-10-03 08:34:46,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:34:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2018-10-03 08:34:46,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 08:34:46,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:46,904 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-10-03 08:34:46,905 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:46,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:46,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2073218144, now seen corresponding path program 4 times [2018-10-03 08:34:46,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:46,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:46,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:46,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:34:46,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:47,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:47,016 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 [2018-10-03 08:34:47,025 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:34:47,057 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:34:47,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:47,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:47,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:47,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-03 08:34:47,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:34:47,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:34:47,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:34:47,312 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 12 states. [2018-10-03 08:34:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:47,397 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2018-10-03 08:34:47,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:34:47,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-10-03 08:34:47,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:47,400 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:34:47,400 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:34:47,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:34:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:34:47,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-10-03 08:34:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:34:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2018-10-03 08:34:47,407 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 23 [2018-10-03 08:34:47,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:47,408 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2018-10-03 08:34:47,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:34:47,408 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2018-10-03 08:34:47,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:34:47,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:47,409 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-10-03 08:34:47,410 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:47,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:47,410 INFO L82 PathProgramCache]: Analyzing trace with hash -609605679, now seen corresponding path program 5 times [2018-10-03 08:34:47,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:47,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:47,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:47,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:34:47,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:47,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:47,958 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 [2018-10-03 08:34:47,967 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:34:47,994 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:34:47,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:47,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:48,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:48,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-03 08:34:48,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:34:48,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:34:48,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:34:48,503 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 14 states. [2018-10-03 08:34:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:48,677 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2018-10-03 08:34:48,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:34:48,678 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2018-10-03 08:34:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:48,679 INFO L225 Difference]: With dead ends: 40 [2018-10-03 08:34:48,680 INFO L226 Difference]: Without dead ends: 38 [2018-10-03 08:34:48,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:34:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-03 08:34:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-10-03 08:34:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:34:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2018-10-03 08:34:48,693 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 28 [2018-10-03 08:34:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:48,693 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2018-10-03 08:34:48,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:34:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2018-10-03 08:34:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-03 08:34:48,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:48,695 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-10-03 08:34:48,695 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:48,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:48,696 INFO L82 PathProgramCache]: Analyzing trace with hash -70825216, now seen corresponding path program 6 times [2018-10-03 08:34:48,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:48,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:48,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:48,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:34:48,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:48,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:48,982 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 [2018-10-03 08:34:48,993 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:34:49,016 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:34:49,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:49,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:49,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:49,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-10-03 08:34:49,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:34:49,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:34:49,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:34:49,280 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 16 states. [2018-10-03 08:34:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:49,382 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2018-10-03 08:34:49,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:34:49,382 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-10-03 08:34:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:49,384 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:34:49,384 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:34:49,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:34:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:34:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-03 08:34:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:34:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2018-10-03 08:34:49,392 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 33 [2018-10-03 08:34:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:49,392 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2018-10-03 08:34:49,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:34:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2018-10-03 08:34:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:34:49,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:49,394 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-10-03 08:34:49,394 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:49,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1872481585, now seen corresponding path program 7 times [2018-10-03 08:34:49,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:49,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:49,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:49,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:34:49,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:49,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:49,586 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 [2018-10-03 08:34:49,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:34:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:49,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:49,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:49,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-03 08:34:49,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:34:49,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:34:49,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:34:49,951 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 18 states. [2018-10-03 08:34:50,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:50,054 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2018-10-03 08:34:50,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:34:50,055 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2018-10-03 08:34:50,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:50,057 INFO L225 Difference]: With dead ends: 50 [2018-10-03 08:34:50,057 INFO L226 Difference]: Without dead ends: 48 [2018-10-03 08:34:50,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:34:50,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-03 08:34:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-10-03 08:34:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-03 08:34:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-10-03 08:34:50,066 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 38 [2018-10-03 08:34:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:50,066 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-10-03 08:34:50,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:34:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-10-03 08:34:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-03 08:34:50,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:50,068 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-10-03 08:34:50,068 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:50,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:50,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1776681376, now seen corresponding path program 8 times [2018-10-03 08:34:50,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:50,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:50,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:50,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:34:50,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:50,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:50,360 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 [2018-10-03 08:34:50,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:34:50,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:34:50,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:50,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:50,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:50,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-03 08:34:50,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:34:50,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:34:50,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:34:50,745 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 20 states. [2018-10-03 08:34:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:50,831 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2018-10-03 08:34:50,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:34:50,832 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2018-10-03 08:34:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:50,833 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:34:50,833 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:34:50,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:34:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:34:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-10-03 08:34:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:34:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2018-10-03 08:34:50,841 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 43 [2018-10-03 08:34:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:50,842 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2018-10-03 08:34:50,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:34:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2018-10-03 08:34:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:34:50,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:50,843 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-10-03 08:34:50,844 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:50,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:50,844 INFO L82 PathProgramCache]: Analyzing trace with hash -951698799, now seen corresponding path program 9 times [2018-10-03 08:34:50,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:50,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:50,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:50,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:34:50,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:51,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:51,061 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 [2018-10-03 08:34:51,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:34:51,096 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-03 08:34:51,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:51,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:51,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:51,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-03 08:34:51,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:34:51,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:34:51,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:34:51,828 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 22 states. [2018-10-03 08:34:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:52,389 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2018-10-03 08:34:52,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:34:52,390 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2018-10-03 08:34:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:52,391 INFO L225 Difference]: With dead ends: 60 [2018-10-03 08:34:52,391 INFO L226 Difference]: Without dead ends: 58 [2018-10-03 08:34:52,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:34:52,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-03 08:34:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-10-03 08:34:52,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-03 08:34:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2018-10-03 08:34:52,401 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 48 [2018-10-03 08:34:52,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:52,401 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2018-10-03 08:34:52,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:34:52,404 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2018-10-03 08:34:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 08:34:52,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:52,405 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-10-03 08:34:52,405 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:52,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:52,406 INFO L82 PathProgramCache]: Analyzing trace with hash -259461056, now seen corresponding path program 10 times [2018-10-03 08:34:52,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:52,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:52,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:52,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:34:52,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:52,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:52,863 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 [2018-10-03 08:34:52,871 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:34:52,901 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:34:52,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:52,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:53,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:53,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-10-03 08:34:53,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:34:53,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:34:53,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:34:53,322 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 24 states. [2018-10-03 08:34:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:53,534 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2018-10-03 08:34:53,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:34:53,534 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2018-10-03 08:34:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:53,536 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:34:53,536 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:34:53,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:34:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:34:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-03 08:34:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:34:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2018-10-03 08:34:53,544 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 53 [2018-10-03 08:34:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:53,545 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2018-10-03 08:34:53,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:34:53,545 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2018-10-03 08:34:53,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:34:53,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:53,546 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-10-03 08:34:53,546 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:53,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:53,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1213165553, now seen corresponding path program 11 times [2018-10-03 08:34:53,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:53,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:53,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:53,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:34:53,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:53,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:53,753 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 [2018-10-03 08:34:53,761 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:34:53,787 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-03 08:34:53,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:53,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:54,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:54,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-10-03 08:34:54,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:34:54,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:34:54,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:34:54,248 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand 26 states. [2018-10-03 08:34:54,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:54,392 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2018-10-03 08:34:54,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:34:54,392 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2018-10-03 08:34:54,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:54,394 INFO L225 Difference]: With dead ends: 70 [2018-10-03 08:34:54,394 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 08:34:54,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:34:54,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 08:34:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-10-03 08:34:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-03 08:34:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2018-10-03 08:34:54,401 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 58 [2018-10-03 08:34:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:54,402 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2018-10-03 08:34:54,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:34:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2018-10-03 08:34:54,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-03 08:34:54,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:54,403 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-10-03 08:34:54,403 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:54,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:54,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1043720480, now seen corresponding path program 12 times [2018-10-03 08:34:54,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:54,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:54,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:54,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:34:54,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:54,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:54,602 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 [2018-10-03 08:34:54,610 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:34:54,665 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:34:54,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:54,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:55,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:55,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-10-03 08:34:55,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:34:55,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:34:55,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:34:55,315 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 28 states. [2018-10-03 08:34:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:55,416 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2018-10-03 08:34:55,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:34:55,416 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2018-10-03 08:34:55,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:55,417 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:34:55,417 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:34:55,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:34:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:34:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-10-03 08:34:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:34:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2018-10-03 08:34:55,424 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 63 [2018-10-03 08:34:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:55,425 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2018-10-03 08:34:55,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:34:55,425 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2018-10-03 08:34:55,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:34:55,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:55,427 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-10-03 08:34:55,427 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:55,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:55,427 INFO L82 PathProgramCache]: Analyzing trace with hash 14511441, now seen corresponding path program 13 times [2018-10-03 08:34:55,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:55,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:55,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:55,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:34:55,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:55,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:55,862 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 [2018-10-03 08:34:55,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:34:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:55,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:56,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:56,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-10-03 08:34:56,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:34:56,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:34:56,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:34:56,372 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand 30 states. [2018-10-03 08:34:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:56,474 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2018-10-03 08:34:56,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:34:56,475 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2018-10-03 08:34:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:56,476 INFO L225 Difference]: With dead ends: 80 [2018-10-03 08:34:56,476 INFO L226 Difference]: Without dead ends: 78 [2018-10-03 08:34:56,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:34:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-03 08:34:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-10-03 08:34:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-03 08:34:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2018-10-03 08:34:56,483 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 68 [2018-10-03 08:34:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:56,483 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2018-10-03 08:34:56,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:34:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2018-10-03 08:34:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-03 08:34:56,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:56,486 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-10-03 08:34:56,486 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:56,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:56,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1220315776, now seen corresponding path program 14 times [2018-10-03 08:34:56,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:56,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:56,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:56,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:34:56,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:56,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:56,914 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 [2018-10-03 08:34:56,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:34:56,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:34:56,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:56,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:57,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:57,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-10-03 08:34:57,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:34:57,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:34:57,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:34:57,501 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand 32 states. [2018-10-03 08:34:57,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:57,650 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2018-10-03 08:34:57,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:34:57,650 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2018-10-03 08:34:57,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:57,652 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:34:57,652 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:34:57,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:34:57,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:34:57,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-03 08:34:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:34:57,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2018-10-03 08:34:57,661 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 73 [2018-10-03 08:34:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:57,662 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2018-10-03 08:34:57,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:34:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2018-10-03 08:34:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:34:57,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:57,663 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-10-03 08:34:57,664 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:57,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:57,664 INFO L82 PathProgramCache]: Analyzing trace with hash 127283889, now seen corresponding path program 15 times [2018-10-03 08:34:57,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:57,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:57,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:57,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:34:57,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:58,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:58,888 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 [2018-10-03 08:34:58,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:34:58,949 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-03 08:34:58,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:58,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:34:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:59,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:34:59,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-10-03 08:34:59,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:34:59,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:34:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:34:59,412 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 34 states. [2018-10-03 08:34:59,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:34:59,564 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2018-10-03 08:34:59,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:34:59,564 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-10-03 08:34:59,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:34:59,565 INFO L225 Difference]: With dead ends: 90 [2018-10-03 08:34:59,565 INFO L226 Difference]: Without dead ends: 88 [2018-10-03 08:34:59,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:34:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-03 08:34:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-10-03 08:34:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-03 08:34:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2018-10-03 08:34:59,572 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 78 [2018-10-03 08:34:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:34:59,572 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2018-10-03 08:34:59,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:34:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2018-10-03 08:34:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-03 08:34:59,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:34:59,573 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-10-03 08:34:59,574 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:34:59,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:34:59,574 INFO L82 PathProgramCache]: Analyzing trace with hash -233894880, now seen corresponding path program 16 times [2018-10-03 08:34:59,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:34:59,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:34:59,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:59,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:34:59,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:34:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:34:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:34:59,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:34:59,828 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 [2018-10-03 08:34:59,836 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:34:59,859 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:34:59,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:34:59,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:00,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:00,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-10-03 08:35:00,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:35:00,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:35:00,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:35:00,303 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand 36 states. [2018-10-03 08:35:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:00,484 INFO L93 Difference]: Finished difference Result 95 states and 131 transitions. [2018-10-03 08:35:00,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:35:00,485 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2018-10-03 08:35:00,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:00,486 INFO L225 Difference]: With dead ends: 95 [2018-10-03 08:35:00,486 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 08:35:00,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:35:00,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 08:35:00,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-10-03 08:35:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 08:35:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2018-10-03 08:35:00,495 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 83 [2018-10-03 08:35:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:00,495 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2018-10-03 08:35:00,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:35:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2018-10-03 08:35:00,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:35:00,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:00,497 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-10-03 08:35:00,497 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:00,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:00,497 INFO L82 PathProgramCache]: Analyzing trace with hash -610287599, now seen corresponding path program 17 times [2018-10-03 08:35:00,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:00,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:00,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:00,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:00,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:00,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:00,782 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 [2018-10-03 08:35:00,795 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:35:00,835 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-03 08:35:00,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:00,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:01,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:01,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-10-03 08:35:01,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:35:01,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:35:01,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:35:01,873 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand 38 states. [2018-10-03 08:35:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:02,009 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2018-10-03 08:35:02,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:35:02,010 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2018-10-03 08:35:02,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:02,011 INFO L225 Difference]: With dead ends: 100 [2018-10-03 08:35:02,011 INFO L226 Difference]: Without dead ends: 98 [2018-10-03 08:35:02,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:35:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-03 08:35:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-10-03 08:35:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-03 08:35:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 130 transitions. [2018-10-03 08:35:02,015 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 130 transitions. Word has length 88 [2018-10-03 08:35:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:02,016 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 130 transitions. [2018-10-03 08:35:02,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:35:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 130 transitions. [2018-10-03 08:35:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-03 08:35:02,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:02,017 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-10-03 08:35:02,017 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:02,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2059852480, now seen corresponding path program 18 times [2018-10-03 08:35:02,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:02,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:02,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:02,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:02,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:02,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:02,297 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 [2018-10-03 08:35:02,304 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:35:02,341 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:35:02,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:02,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:03,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:03,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-10-03 08:35:03,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:35:03,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:35:03,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:35:03,195 INFO L87 Difference]: Start difference. First operand 94 states and 130 transitions. Second operand 40 states. [2018-10-03 08:35:03,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:03,393 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2018-10-03 08:35:03,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:35:03,394 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 93 [2018-10-03 08:35:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:03,395 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:35:03,395 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:35:03,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:35:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:35:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-03 08:35:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:35:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2018-10-03 08:35:03,402 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 93 [2018-10-03 08:35:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:03,402 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2018-10-03 08:35:03,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:35:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2018-10-03 08:35:03,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:35:03,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:03,404 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-10-03 08:35:03,404 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:03,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:03,405 INFO L82 PathProgramCache]: Analyzing trace with hash -996141711, now seen corresponding path program 19 times [2018-10-03 08:35:03,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:03,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:03,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:03,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:03,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:03,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:03,744 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 [2018-10-03 08:35:03,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:03,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:04,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:04,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-10-03 08:35:04,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:35:04,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:35:04,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:35:04,581 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 42 states. [2018-10-03 08:35:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:04,709 INFO L93 Difference]: Finished difference Result 110 states and 152 transitions. [2018-10-03 08:35:04,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:35:04,709 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2018-10-03 08:35:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:04,710 INFO L225 Difference]: With dead ends: 110 [2018-10-03 08:35:04,711 INFO L226 Difference]: Without dead ends: 108 [2018-10-03 08:35:04,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:35:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-03 08:35:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-10-03 08:35:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-03 08:35:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2018-10-03 08:35:04,716 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 98 [2018-10-03 08:35:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:04,716 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2018-10-03 08:35:04,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:35:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2018-10-03 08:35:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-03 08:35:04,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:04,717 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-10-03 08:35:04,717 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:04,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:04,718 INFO L82 PathProgramCache]: Analyzing trace with hash -511385248, now seen corresponding path program 20 times [2018-10-03 08:35:04,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:04,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:04,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:04,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:04,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:05,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:05,208 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 [2018-10-03 08:35:05,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:35:05,243 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:35:05,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:05,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:07,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:07,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-10-03 08:35:07,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:35:07,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:35:07,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:35:07,498 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand 44 states. [2018-10-03 08:35:07,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:07,751 INFO L93 Difference]: Finished difference Result 115 states and 159 transitions. [2018-10-03 08:35:07,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:35:07,752 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 103 [2018-10-03 08:35:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:07,754 INFO L225 Difference]: With dead ends: 115 [2018-10-03 08:35:07,754 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 08:35:07,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:35:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 08:35:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-10-03 08:35:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 08:35:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 151 transitions. [2018-10-03 08:35:07,759 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 151 transitions. Word has length 103 [2018-10-03 08:35:07,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:07,759 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 151 transitions. [2018-10-03 08:35:07,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:35:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 151 transitions. [2018-10-03 08:35:07,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 08:35:07,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:07,760 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-10-03 08:35:07,760 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:07,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:07,760 INFO L82 PathProgramCache]: Analyzing trace with hash 851260113, now seen corresponding path program 21 times [2018-10-03 08:35:07,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:07,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:07,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:07,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:07,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:08,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:08,631 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 [2018-10-03 08:35:08,643 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:35:08,692 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-03 08:35:08,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:08,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:09,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:09,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-10-03 08:35:09,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:35:09,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:35:09,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:35:09,246 INFO L87 Difference]: Start difference. First operand 109 states and 151 transitions. Second operand 46 states. [2018-10-03 08:35:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:09,544 INFO L93 Difference]: Finished difference Result 120 states and 166 transitions. [2018-10-03 08:35:09,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:35:09,545 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 108 [2018-10-03 08:35:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:09,546 INFO L225 Difference]: With dead ends: 120 [2018-10-03 08:35:09,546 INFO L226 Difference]: Without dead ends: 118 [2018-10-03 08:35:09,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:35:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-03 08:35:09,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-10-03 08:35:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-03 08:35:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2018-10-03 08:35:09,551 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 158 transitions. Word has length 108 [2018-10-03 08:35:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:09,551 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 158 transitions. [2018-10-03 08:35:09,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:35:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 158 transitions. [2018-10-03 08:35:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-03 08:35:09,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:09,552 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-10-03 08:35:09,552 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:09,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:09,553 INFO L82 PathProgramCache]: Analyzing trace with hash -572317696, now seen corresponding path program 22 times [2018-10-03 08:35:09,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:09,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:09,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:09,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:09,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:10,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:10,085 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 [2018-10-03 08:35:10,097 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:35:10,143 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:35:10,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:10,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:10,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:10,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-10-03 08:35:10,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:35:10,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:35:10,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:35:10,701 INFO L87 Difference]: Start difference. First operand 114 states and 158 transitions. Second operand 48 states. [2018-10-03 08:35:10,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:10,871 INFO L93 Difference]: Finished difference Result 125 states and 173 transitions. [2018-10-03 08:35:10,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:35:10,871 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 113 [2018-10-03 08:35:10,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:10,872 INFO L225 Difference]: With dead ends: 125 [2018-10-03 08:35:10,872 INFO L226 Difference]: Without dead ends: 123 [2018-10-03 08:35:10,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:35:10,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-03 08:35:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-03 08:35:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 08:35:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 165 transitions. [2018-10-03 08:35:10,879 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 165 transitions. Word has length 113 [2018-10-03 08:35:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:10,879 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 165 transitions. [2018-10-03 08:35:10,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:35:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 165 transitions. [2018-10-03 08:35:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 08:35:10,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:10,880 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-10-03 08:35:10,880 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:10,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:10,881 INFO L82 PathProgramCache]: Analyzing trace with hash 513611825, now seen corresponding path program 23 times [2018-10-03 08:35:10,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:10,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:10,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:10,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:10,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:11,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:11,609 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 [2018-10-03 08:35:11,617 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:35:11,662 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-03 08:35:11,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:11,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:12,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:12,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-10-03 08:35:12,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:35:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:35:12,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:35:12,379 INFO L87 Difference]: Start difference. First operand 119 states and 165 transitions. Second operand 50 states. [2018-10-03 08:35:12,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:12,542 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2018-10-03 08:35:12,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:35:12,543 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 118 [2018-10-03 08:35:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:12,544 INFO L225 Difference]: With dead ends: 130 [2018-10-03 08:35:12,544 INFO L226 Difference]: Without dead ends: 128 [2018-10-03 08:35:12,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:35:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-03 08:35:12,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-10-03 08:35:12,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-03 08:35:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2018-10-03 08:35:12,551 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 118 [2018-10-03 08:35:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:12,551 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2018-10-03 08:35:12,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:35:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2018-10-03 08:35:12,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-03 08:35:12,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:12,552 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-10-03 08:35:12,552 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:12,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:12,553 INFO L82 PathProgramCache]: Analyzing trace with hash -285501792, now seen corresponding path program 24 times [2018-10-03 08:35:12,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:12,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:12,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:12,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:12,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:12,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:12,993 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 [2018-10-03 08:35:13,000 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:35:13,050 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:35:13,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:13,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:13,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:13,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-10-03 08:35:13,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:35:13,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:35:13,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:35:13,973 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand 52 states. [2018-10-03 08:35:14,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:14,111 INFO L93 Difference]: Finished difference Result 135 states and 187 transitions. [2018-10-03 08:35:14,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:35:14,112 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 123 [2018-10-03 08:35:14,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:14,113 INFO L225 Difference]: With dead ends: 135 [2018-10-03 08:35:14,113 INFO L226 Difference]: Without dead ends: 133 [2018-10-03 08:35:14,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:35:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-03 08:35:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-10-03 08:35:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-03 08:35:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2018-10-03 08:35:14,120 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 123 [2018-10-03 08:35:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:14,121 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2018-10-03 08:35:14,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:35:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2018-10-03 08:35:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 08:35:14,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:14,122 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-10-03 08:35:14,122 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:14,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:14,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1768277393, now seen corresponding path program 25 times [2018-10-03 08:35:14,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:14,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:14,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:14,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:14,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:15,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:15,520 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 [2018-10-03 08:35:15,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:15,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:16,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:16,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-10-03 08:35:16,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:35:16,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:35:16,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:35:16,277 INFO L87 Difference]: Start difference. First operand 129 states and 179 transitions. Second operand 54 states. [2018-10-03 08:35:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:16,516 INFO L93 Difference]: Finished difference Result 140 states and 194 transitions. [2018-10-03 08:35:16,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:35:16,516 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 128 [2018-10-03 08:35:16,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:16,517 INFO L225 Difference]: With dead ends: 140 [2018-10-03 08:35:16,518 INFO L226 Difference]: Without dead ends: 138 [2018-10-03 08:35:16,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:35:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-03 08:35:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-10-03 08:35:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-03 08:35:16,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 186 transitions. [2018-10-03 08:35:16,524 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 186 transitions. Word has length 128 [2018-10-03 08:35:16,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:16,524 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 186 transitions. [2018-10-03 08:35:16,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:35:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 186 transitions. [2018-10-03 08:35:16,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-03 08:35:16,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:16,525 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-10-03 08:35:16,526 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:16,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:16,526 INFO L82 PathProgramCache]: Analyzing trace with hash -77052608, now seen corresponding path program 26 times [2018-10-03 08:35:16,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:16,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:16,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:16,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:16,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:17,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:17,215 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 [2018-10-03 08:35:17,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:35:17,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:35:17,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:17,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:18,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:18,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-10-03 08:35:18,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:35:18,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:35:18,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:35:18,295 INFO L87 Difference]: Start difference. First operand 134 states and 186 transitions. Second operand 56 states. [2018-10-03 08:35:18,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:18,526 INFO L93 Difference]: Finished difference Result 145 states and 201 transitions. [2018-10-03 08:35:18,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:35:18,526 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2018-10-03 08:35:18,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:18,528 INFO L225 Difference]: With dead ends: 145 [2018-10-03 08:35:18,528 INFO L226 Difference]: Without dead ends: 143 [2018-10-03 08:35:18,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:35:18,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-03 08:35:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-03 08:35:18,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-03 08:35:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 193 transitions. [2018-10-03 08:35:18,535 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 193 transitions. Word has length 133 [2018-10-03 08:35:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:18,536 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 193 transitions. [2018-10-03 08:35:18,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:35:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 193 transitions. [2018-10-03 08:35:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-03 08:35:18,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:18,537 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-10-03 08:35:18,537 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:18,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1019034353, now seen corresponding path program 27 times [2018-10-03 08:35:18,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:18,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:18,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:18,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:18,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:19,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:19,138 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 [2018-10-03 08:35:19,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:35:19,201 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-03 08:35:19,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:19,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:19,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:19,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-10-03 08:35:19,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:35:19,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:35:19,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:35:19,996 INFO L87 Difference]: Start difference. First operand 139 states and 193 transitions. Second operand 58 states. [2018-10-03 08:35:20,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:20,226 INFO L93 Difference]: Finished difference Result 150 states and 208 transitions. [2018-10-03 08:35:20,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:35:20,227 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 138 [2018-10-03 08:35:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:20,228 INFO L225 Difference]: With dead ends: 150 [2018-10-03 08:35:20,228 INFO L226 Difference]: Without dead ends: 148 [2018-10-03 08:35:20,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:35:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-03 08:35:20,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-10-03 08:35:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-03 08:35:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 200 transitions. [2018-10-03 08:35:20,236 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 200 transitions. Word has length 138 [2018-10-03 08:35:20,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:20,237 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 200 transitions. [2018-10-03 08:35:20,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:35:20,237 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 200 transitions. [2018-10-03 08:35:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-03 08:35:20,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:20,238 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-10-03 08:35:20,239 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:20,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:20,239 INFO L82 PathProgramCache]: Analyzing trace with hash -247256096, now seen corresponding path program 28 times [2018-10-03 08:35:20,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:20,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:20,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:20,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:20,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:22,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:22,061 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 [2018-10-03 08:35:22,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:35:22,106 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:35:22,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:22,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:23,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:23,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-10-03 08:35:23,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:35:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:35:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:35:23,388 INFO L87 Difference]: Start difference. First operand 144 states and 200 transitions. Second operand 60 states. [2018-10-03 08:35:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:23,616 INFO L93 Difference]: Finished difference Result 155 states and 215 transitions. [2018-10-03 08:35:23,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:35:23,617 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 143 [2018-10-03 08:35:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:23,618 INFO L225 Difference]: With dead ends: 155 [2018-10-03 08:35:23,618 INFO L226 Difference]: Without dead ends: 153 [2018-10-03 08:35:23,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:35:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-03 08:35:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-10-03 08:35:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-03 08:35:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2018-10-03 08:35:23,625 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 143 [2018-10-03 08:35:23,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:23,626 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2018-10-03 08:35:23,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:35:23,626 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2018-10-03 08:35:23,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-03 08:35:23,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:23,627 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-10-03 08:35:23,627 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:23,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:23,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1791588433, now seen corresponding path program 29 times [2018-10-03 08:35:23,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:23,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:23,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:23,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:23,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:24,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:24,410 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 [2018-10-03 08:35:24,417 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:35:24,483 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-03 08:35:24,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:24,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:25,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:25,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-10-03 08:35:25,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:35:25,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:35:25,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:35:25,361 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand 62 states. [2018-10-03 08:35:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:25,570 INFO L93 Difference]: Finished difference Result 160 states and 222 transitions. [2018-10-03 08:35:25,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:35:25,571 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 148 [2018-10-03 08:35:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:25,572 INFO L225 Difference]: With dead ends: 160 [2018-10-03 08:35:25,572 INFO L226 Difference]: Without dead ends: 158 [2018-10-03 08:35:25,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:35:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-03 08:35:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-10-03 08:35:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-03 08:35:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 214 transitions. [2018-10-03 08:35:25,578 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 214 transitions. Word has length 148 [2018-10-03 08:35:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:25,579 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 214 transitions. [2018-10-03 08:35:25,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:35:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 214 transitions. [2018-10-03 08:35:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-03 08:35:25,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:25,580 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-10-03 08:35:25,580 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:25,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1713785472, now seen corresponding path program 30 times [2018-10-03 08:35:25,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:25,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:25,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:25,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:25,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:26,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:26,147 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 [2018-10-03 08:35:26,170 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:35:26,249 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 08:35:26,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:26,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:27,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:27,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-10-03 08:35:27,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:35:27,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:35:27,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:35:27,175 INFO L87 Difference]: Start difference. First operand 154 states and 214 transitions. Second operand 64 states. [2018-10-03 08:35:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:27,668 INFO L93 Difference]: Finished difference Result 165 states and 229 transitions. [2018-10-03 08:35:27,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:35:27,669 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 153 [2018-10-03 08:35:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:27,670 INFO L225 Difference]: With dead ends: 165 [2018-10-03 08:35:27,670 INFO L226 Difference]: Without dead ends: 163 [2018-10-03 08:35:27,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:35:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-03 08:35:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-03 08:35:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-03 08:35:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 221 transitions. [2018-10-03 08:35:27,677 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 221 transitions. Word has length 153 [2018-10-03 08:35:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:27,678 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 221 transitions. [2018-10-03 08:35:27,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:35:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 221 transitions. [2018-10-03 08:35:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-03 08:35:27,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:27,679 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-10-03 08:35:27,679 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:27,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:27,680 INFO L82 PathProgramCache]: Analyzing trace with hash -835682895, now seen corresponding path program 31 times [2018-10-03 08:35:27,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:27,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:27,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:27,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:27,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:29,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:29,583 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 [2018-10-03 08:35:29,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:29,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:30,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:30,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-10-03 08:35:30,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:35:30,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:35:30,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:35:30,645 INFO L87 Difference]: Start difference. First operand 159 states and 221 transitions. Second operand 66 states. [2018-10-03 08:35:30,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:30,898 INFO L93 Difference]: Finished difference Result 170 states and 236 transitions. [2018-10-03 08:35:30,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:35:30,898 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 158 [2018-10-03 08:35:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:30,900 INFO L225 Difference]: With dead ends: 170 [2018-10-03 08:35:30,900 INFO L226 Difference]: Without dead ends: 168 [2018-10-03 08:35:30,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:35:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-03 08:35:30,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-10-03 08:35:30,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-03 08:35:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 228 transitions. [2018-10-03 08:35:30,907 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 228 transitions. Word has length 158 [2018-10-03 08:35:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:30,907 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 228 transitions. [2018-10-03 08:35:30,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:35:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 228 transitions. [2018-10-03 08:35:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-03 08:35:30,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:30,908 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-10-03 08:35:30,909 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:30,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:30,909 INFO L82 PathProgramCache]: Analyzing trace with hash 925606176, now seen corresponding path program 32 times [2018-10-03 08:35:30,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:30,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:30,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:30,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:30,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:31,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:31,672 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 [2018-10-03 08:35:31,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:35:31,730 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:35:31,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:31,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:32,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:32,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-10-03 08:35:32,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:35:32,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:35:32,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:35:32,785 INFO L87 Difference]: Start difference. First operand 164 states and 228 transitions. Second operand 68 states. [2018-10-03 08:35:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:33,058 INFO L93 Difference]: Finished difference Result 175 states and 243 transitions. [2018-10-03 08:35:33,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:35:33,059 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 163 [2018-10-03 08:35:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:33,060 INFO L225 Difference]: With dead ends: 175 [2018-10-03 08:35:33,060 INFO L226 Difference]: Without dead ends: 173 [2018-10-03 08:35:33,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:35:33,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-03 08:35:33,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-10-03 08:35:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-03 08:35:33,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 235 transitions. [2018-10-03 08:35:33,069 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 235 transitions. Word has length 163 [2018-10-03 08:35:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:33,070 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 235 transitions. [2018-10-03 08:35:33,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:35:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 235 transitions. [2018-10-03 08:35:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-03 08:35:33,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:33,071 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-10-03 08:35:33,071 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:33,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:33,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1441248495, now seen corresponding path program 33 times [2018-10-03 08:35:33,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:33,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:33,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:33,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:33,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:33,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:33,780 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 [2018-10-03 08:35:33,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:35:33,873 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-03 08:35:33,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:33,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:35,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:35,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-10-03 08:35:35,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:35:35,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:35:35,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:35:35,113 INFO L87 Difference]: Start difference. First operand 169 states and 235 transitions. Second operand 70 states. [2018-10-03 08:35:35,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:35,489 INFO L93 Difference]: Finished difference Result 180 states and 250 transitions. [2018-10-03 08:35:35,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:35:35,490 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 168 [2018-10-03 08:35:35,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:35,491 INFO L225 Difference]: With dead ends: 180 [2018-10-03 08:35:35,491 INFO L226 Difference]: Without dead ends: 178 [2018-10-03 08:35:35,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:35:35,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-03 08:35:35,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-10-03 08:35:35,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-03 08:35:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 242 transitions. [2018-10-03 08:35:35,498 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 242 transitions. Word has length 168 [2018-10-03 08:35:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:35,498 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 242 transitions. [2018-10-03 08:35:35,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:35:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 242 transitions. [2018-10-03 08:35:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-03 08:35:35,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:35,500 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-10-03 08:35:35,500 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:35,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:35,500 INFO L82 PathProgramCache]: Analyzing trace with hash 686632896, now seen corresponding path program 34 times [2018-10-03 08:35:35,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:35,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:35,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:35,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:35,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:36,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:36,194 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 [2018-10-03 08:35:36,201 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:35:36,247 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:35:36,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:36,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:37,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:37,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-10-03 08:35:37,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:35:37,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:35:37,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:35:37,384 INFO L87 Difference]: Start difference. First operand 174 states and 242 transitions. Second operand 72 states. [2018-10-03 08:35:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:38,623 INFO L93 Difference]: Finished difference Result 185 states and 257 transitions. [2018-10-03 08:35:38,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:35:38,625 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 173 [2018-10-03 08:35:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:38,626 INFO L225 Difference]: With dead ends: 185 [2018-10-03 08:35:38,626 INFO L226 Difference]: Without dead ends: 183 [2018-10-03 08:35:38,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:35:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-03 08:35:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-10-03 08:35:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-03 08:35:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 249 transitions. [2018-10-03 08:35:38,633 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 249 transitions. Word has length 173 [2018-10-03 08:35:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:38,633 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 249 transitions. [2018-10-03 08:35:38,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:35:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 249 transitions. [2018-10-03 08:35:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-03 08:35:38,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:38,634 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-10-03 08:35:38,635 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:38,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:38,635 INFO L82 PathProgramCache]: Analyzing trace with hash 170319985, now seen corresponding path program 35 times [2018-10-03 08:35:38,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:38,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:38,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:38,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:38,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:40,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:40,626 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 [2018-10-03 08:35:40,634 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:35:40,705 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-03 08:35:40,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:40,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:42,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:42,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-10-03 08:35:42,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:35:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:35:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:35:42,520 INFO L87 Difference]: Start difference. First operand 179 states and 249 transitions. Second operand 74 states. [2018-10-03 08:35:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:42,844 INFO L93 Difference]: Finished difference Result 190 states and 264 transitions. [2018-10-03 08:35:42,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:35:42,844 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 178 [2018-10-03 08:35:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:42,845 INFO L225 Difference]: With dead ends: 190 [2018-10-03 08:35:42,845 INFO L226 Difference]: Without dead ends: 188 [2018-10-03 08:35:42,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:35:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-10-03 08:35:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-10-03 08:35:42,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-03 08:35:42,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2018-10-03 08:35:42,851 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 178 [2018-10-03 08:35:42,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:42,852 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2018-10-03 08:35:42,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:35:42,852 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2018-10-03 08:35:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-03 08:35:42,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:42,853 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-10-03 08:35:42,853 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:42,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2021329312, now seen corresponding path program 36 times [2018-10-03 08:35:42,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:42,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:42,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:42,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:42,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:43,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:43,991 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 [2018-10-03 08:35:43,999 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:35:44,091 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 08:35:44,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:44,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:45,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:45,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-10-03 08:35:45,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:35:45,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:35:45,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:35:45,989 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand 76 states. [2018-10-03 08:35:46,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:46,294 INFO L93 Difference]: Finished difference Result 195 states and 271 transitions. [2018-10-03 08:35:46,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:35:46,294 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 183 [2018-10-03 08:35:46,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:46,296 INFO L225 Difference]: With dead ends: 195 [2018-10-03 08:35:46,296 INFO L226 Difference]: Without dead ends: 193 [2018-10-03 08:35:46,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:35:46,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-03 08:35:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-10-03 08:35:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-03 08:35:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 263 transitions. [2018-10-03 08:35:46,303 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 263 transitions. Word has length 183 [2018-10-03 08:35:46,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:46,303 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 263 transitions. [2018-10-03 08:35:46,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:35:46,303 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 263 transitions. [2018-10-03 08:35:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-03 08:35:46,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:46,305 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-10-03 08:35:46,305 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:46,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:46,305 INFO L82 PathProgramCache]: Analyzing trace with hash 578960849, now seen corresponding path program 37 times [2018-10-03 08:35:46,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:46,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:46,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:46,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:46,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:48,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:48,179 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 [2018-10-03 08:35:48,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:48,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:49,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:49,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-10-03 08:35:49,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:35:49,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:35:49,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:35:49,829 INFO L87 Difference]: Start difference. First operand 189 states and 263 transitions. Second operand 78 states. [2018-10-03 08:35:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:50,169 INFO L93 Difference]: Finished difference Result 200 states and 278 transitions. [2018-10-03 08:35:50,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:35:50,170 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 188 [2018-10-03 08:35:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:50,171 INFO L225 Difference]: With dead ends: 200 [2018-10-03 08:35:50,171 INFO L226 Difference]: Without dead ends: 198 [2018-10-03 08:35:50,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:35:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-03 08:35:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-10-03 08:35:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-03 08:35:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 270 transitions. [2018-10-03 08:35:50,178 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 270 transitions. Word has length 188 [2018-10-03 08:35:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:50,178 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 270 transitions. [2018-10-03 08:35:50,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:35:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 270 transitions. [2018-10-03 08:35:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-03 08:35:50,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:50,180 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-10-03 08:35:50,180 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:50,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:50,180 INFO L82 PathProgramCache]: Analyzing trace with hash -963840768, now seen corresponding path program 38 times [2018-10-03 08:35:50,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:50,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:50,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:50,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:35:50,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:51,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:51,266 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 [2018-10-03 08:35:51,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:35:51,338 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:35:51,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:51,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:52,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:52,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2018-10-03 08:35:52,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:35:52,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:35:52,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:35:52,800 INFO L87 Difference]: Start difference. First operand 194 states and 270 transitions. Second operand 80 states. [2018-10-03 08:35:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:53,173 INFO L93 Difference]: Finished difference Result 205 states and 285 transitions. [2018-10-03 08:35:53,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:35:53,173 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 193 [2018-10-03 08:35:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:53,174 INFO L225 Difference]: With dead ends: 205 [2018-10-03 08:35:53,174 INFO L226 Difference]: Without dead ends: 203 [2018-10-03 08:35:53,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:35:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-03 08:35:53,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-10-03 08:35:53,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-03 08:35:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 277 transitions. [2018-10-03 08:35:53,182 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 277 transitions. Word has length 193 [2018-10-03 08:35:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:53,182 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 277 transitions. [2018-10-03 08:35:53,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:35:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 277 transitions. [2018-10-03 08:35:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-03 08:35:53,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:53,183 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-10-03 08:35:53,184 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:53,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1345297615, now seen corresponding path program 39 times [2018-10-03 08:35:53,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:53,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:53,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:53,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:53,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:54,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:54,104 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 [2018-10-03 08:35:54,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:35:54,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-03 08:35:54,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:54,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:55,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:55,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-10-03 08:35:55,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:35:55,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:35:55,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:35:55,865 INFO L87 Difference]: Start difference. First operand 199 states and 277 transitions. Second operand 82 states. [2018-10-03 08:35:56,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:56,295 INFO L93 Difference]: Finished difference Result 210 states and 292 transitions. [2018-10-03 08:35:56,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:35:56,296 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 198 [2018-10-03 08:35:56,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:56,297 INFO L225 Difference]: With dead ends: 210 [2018-10-03 08:35:56,297 INFO L226 Difference]: Without dead ends: 208 [2018-10-03 08:35:56,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:35:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-03 08:35:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-10-03 08:35:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-10-03 08:35:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 284 transitions. [2018-10-03 08:35:56,304 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 284 transitions. Word has length 198 [2018-10-03 08:35:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:56,304 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 284 transitions. [2018-10-03 08:35:56,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:35:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 284 transitions. [2018-10-03 08:35:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-03 08:35:56,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:56,306 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-10-03 08:35:56,306 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:56,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:56,306 INFO L82 PathProgramCache]: Analyzing trace with hash 555690912, now seen corresponding path program 40 times [2018-10-03 08:35:56,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:56,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:56,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:56,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:56,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:35:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:57,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:35:57,223 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 [2018-10-03 08:35:57,230 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:35:57,281 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:35:57,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:35:57,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:35:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:35:58,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:35:58,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 83 [2018-10-03 08:35:58,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:35:58,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:35:58,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:35:58,747 INFO L87 Difference]: Start difference. First operand 204 states and 284 transitions. Second operand 84 states. [2018-10-03 08:35:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:35:59,119 INFO L93 Difference]: Finished difference Result 215 states and 299 transitions. [2018-10-03 08:35:59,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:35:59,119 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 203 [2018-10-03 08:35:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:35:59,122 INFO L225 Difference]: With dead ends: 215 [2018-10-03 08:35:59,122 INFO L226 Difference]: Without dead ends: 213 [2018-10-03 08:35:59,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:35:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-03 08:35:59,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-10-03 08:35:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-03 08:35:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 291 transitions. [2018-10-03 08:35:59,128 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 291 transitions. Word has length 203 [2018-10-03 08:35:59,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:35:59,128 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 291 transitions. [2018-10-03 08:35:59,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:35:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 291 transitions. [2018-10-03 08:35:59,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-03 08:35:59,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:35:59,129 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-10-03 08:35:59,129 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:35:59,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:35:59,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1463242897, now seen corresponding path program 41 times [2018-10-03 08:35:59,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:35:59,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:35:59,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:59,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:35:59,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:35:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:00,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:00,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:00,388 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 [2018-10-03 08:36:00,396 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:36:00,487 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-03 08:36:00,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:00,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:04,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:04,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-10-03 08:36:04,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:36:04,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:36:04,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:36:04,543 INFO L87 Difference]: Start difference. First operand 209 states and 291 transitions. Second operand 86 states. [2018-10-03 08:36:04,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:04,997 INFO L93 Difference]: Finished difference Result 220 states and 306 transitions. [2018-10-03 08:36:04,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:36:04,998 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 208 [2018-10-03 08:36:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:04,999 INFO L225 Difference]: With dead ends: 220 [2018-10-03 08:36:04,999 INFO L226 Difference]: Without dead ends: 218 [2018-10-03 08:36:04,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:36:05,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-03 08:36:05,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-10-03 08:36:05,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-03 08:36:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 298 transitions. [2018-10-03 08:36:05,005 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 298 transitions. Word has length 208 [2018-10-03 08:36:05,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:05,006 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 298 transitions. [2018-10-03 08:36:05,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:36:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 298 transitions. [2018-10-03 08:36:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-03 08:36:05,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:05,007 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-10-03 08:36:05,007 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:05,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:05,007 INFO L82 PathProgramCache]: Analyzing trace with hash 970299968, now seen corresponding path program 42 times [2018-10-03 08:36:05,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:05,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:05,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:05,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:05,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:06,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:06,087 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 [2018-10-03 08:36:06,094 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:36:06,195 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-03 08:36:06,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:06,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:07,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:07,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 87 [2018-10-03 08:36:07,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:36:07,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:36:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:36:07,927 INFO L87 Difference]: Start difference. First operand 214 states and 298 transitions. Second operand 88 states. [2018-10-03 08:36:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:08,355 INFO L93 Difference]: Finished difference Result 225 states and 313 transitions. [2018-10-03 08:36:08,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:36:08,355 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 213 [2018-10-03 08:36:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:08,356 INFO L225 Difference]: With dead ends: 225 [2018-10-03 08:36:08,356 INFO L226 Difference]: Without dead ends: 223 [2018-10-03 08:36:08,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:36:08,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-03 08:36:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-10-03 08:36:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-03 08:36:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 305 transitions. [2018-10-03 08:36:08,362 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 305 transitions. Word has length 213 [2018-10-03 08:36:08,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:08,362 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 305 transitions. [2018-10-03 08:36:08,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:36:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 305 transitions. [2018-10-03 08:36:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-03 08:36:08,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:08,364 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-10-03 08:36:08,364 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:08,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:08,364 INFO L82 PathProgramCache]: Analyzing trace with hash 106759665, now seen corresponding path program 43 times [2018-10-03 08:36:08,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:08,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:08,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:08,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:08,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:09,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:09,391 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 [2018-10-03 08:36:09,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:09,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:11,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:11,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 89 [2018-10-03 08:36:11,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:36:11,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:36:11,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:36:11,321 INFO L87 Difference]: Start difference. First operand 219 states and 305 transitions. Second operand 90 states. [2018-10-03 08:36:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:11,763 INFO L93 Difference]: Finished difference Result 230 states and 320 transitions. [2018-10-03 08:36:11,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:36:11,763 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 218 [2018-10-03 08:36:11,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:11,765 INFO L225 Difference]: With dead ends: 230 [2018-10-03 08:36:11,765 INFO L226 Difference]: Without dead ends: 228 [2018-10-03 08:36:11,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:36:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-03 08:36:11,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-10-03 08:36:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-03 08:36:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 312 transitions. [2018-10-03 08:36:11,770 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 312 transitions. Word has length 218 [2018-10-03 08:36:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:11,771 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 312 transitions. [2018-10-03 08:36:11,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:36:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 312 transitions. [2018-10-03 08:36:11,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-03 08:36:11,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:11,772 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-10-03 08:36:11,772 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:11,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1161150240, now seen corresponding path program 44 times [2018-10-03 08:36:11,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:11,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:11,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:11,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:11,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:12,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:12,802 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 [2018-10-03 08:36:12,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:36:12,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:36:12,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:12,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:14,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:14,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 91 [2018-10-03 08:36:14,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 08:36:14,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 08:36:14,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:36:14,545 INFO L87 Difference]: Start difference. First operand 224 states and 312 transitions. Second operand 92 states. [2018-10-03 08:36:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:14,997 INFO L93 Difference]: Finished difference Result 235 states and 327 transitions. [2018-10-03 08:36:14,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:36:14,997 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 223 [2018-10-03 08:36:14,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:14,998 INFO L225 Difference]: With dead ends: 235 [2018-10-03 08:36:14,998 INFO L226 Difference]: Without dead ends: 233 [2018-10-03 08:36:14,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:36:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-03 08:36:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-10-03 08:36:15,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-03 08:36:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 319 transitions. [2018-10-03 08:36:15,006 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 319 transitions. Word has length 223 [2018-10-03 08:36:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:15,006 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 319 transitions. [2018-10-03 08:36:15,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 08:36:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 319 transitions. [2018-10-03 08:36:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-03 08:36:15,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:15,008 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-10-03 08:36:15,008 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:15,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1399292753, now seen corresponding path program 45 times [2018-10-03 08:36:15,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:15,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:15,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:15,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:15,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:16,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:16,043 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 [2018-10-03 08:36:16,051 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:36:16,153 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-03 08:36:16,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:16,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:17,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:17,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2018-10-03 08:36:17,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:36:17,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:36:17,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:36:17,954 INFO L87 Difference]: Start difference. First operand 229 states and 319 transitions. Second operand 94 states. [2018-10-03 08:36:18,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:18,397 INFO L93 Difference]: Finished difference Result 240 states and 334 transitions. [2018-10-03 08:36:18,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:36:18,398 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 228 [2018-10-03 08:36:18,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:18,399 INFO L225 Difference]: With dead ends: 240 [2018-10-03 08:36:18,399 INFO L226 Difference]: Without dead ends: 238 [2018-10-03 08:36:18,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:36:18,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-10-03 08:36:18,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-10-03 08:36:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-10-03 08:36:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2018-10-03 08:36:18,407 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 228 [2018-10-03 08:36:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:18,407 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2018-10-03 08:36:18,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:36:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2018-10-03 08:36:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-03 08:36:18,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:18,409 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-10-03 08:36:18,409 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:18,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:18,409 INFO L82 PathProgramCache]: Analyzing trace with hash -174645376, now seen corresponding path program 46 times [2018-10-03 08:36:18,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:18,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:18,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:18,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:18,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:19,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:19,594 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 [2018-10-03 08:36:19,601 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:36:19,679 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:36:19,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:19,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:21,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:21,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2018-10-03 08:36:21,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-03 08:36:21,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-03 08:36:21,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:36:21,840 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand 96 states. [2018-10-03 08:36:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:22,426 INFO L93 Difference]: Finished difference Result 245 states and 341 transitions. [2018-10-03 08:36:22,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:36:22,426 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 233 [2018-10-03 08:36:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:22,427 INFO L225 Difference]: With dead ends: 245 [2018-10-03 08:36:22,428 INFO L226 Difference]: Without dead ends: 243 [2018-10-03 08:36:22,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:36:22,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-03 08:36:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-10-03 08:36:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-03 08:36:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 333 transitions. [2018-10-03 08:36:22,436 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 333 transitions. Word has length 233 [2018-10-03 08:36:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:22,436 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 333 transitions. [2018-10-03 08:36:22,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-03 08:36:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 333 transitions. [2018-10-03 08:36:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-03 08:36:22,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:22,437 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-10-03 08:36:22,438 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:22,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash -587413327, now seen corresponding path program 47 times [2018-10-03 08:36:22,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:22,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:22,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:22,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:22,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:23,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:23,564 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 [2018-10-03 08:36:23,571 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:36:23,679 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-03 08:36:23,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:23,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:25,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:25,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2018-10-03 08:36:25,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:36:25,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:36:25,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:36:25,887 INFO L87 Difference]: Start difference. First operand 239 states and 333 transitions. Second operand 98 states. [2018-10-03 08:36:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:26,430 INFO L93 Difference]: Finished difference Result 250 states and 348 transitions. [2018-10-03 08:36:26,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:36:26,430 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 238 [2018-10-03 08:36:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:26,432 INFO L225 Difference]: With dead ends: 250 [2018-10-03 08:36:26,432 INFO L226 Difference]: Without dead ends: 248 [2018-10-03 08:36:26,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:36:26,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-03 08:36:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-10-03 08:36:26,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-03 08:36:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2018-10-03 08:36:26,440 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 238 [2018-10-03 08:36:26,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:26,441 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2018-10-03 08:36:26,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:36:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2018-10-03 08:36:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-03 08:36:26,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:26,442 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-10-03 08:36:26,442 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:26,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:26,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2091502048, now seen corresponding path program 48 times [2018-10-03 08:36:26,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:26,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:26,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:26,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:26,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:27,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:27,641 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 [2018-10-03 08:36:27,648 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:36:27,756 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-03 08:36:27,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:27,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:29,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:29,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 99 [2018-10-03 08:36:29,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-03 08:36:29,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-03 08:36:29,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:36:29,686 INFO L87 Difference]: Start difference. First operand 244 states and 340 transitions. Second operand 100 states. [2018-10-03 08:36:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:30,294 INFO L93 Difference]: Finished difference Result 255 states and 355 transitions. [2018-10-03 08:36:30,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:36:30,294 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 243 [2018-10-03 08:36:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:30,295 INFO L225 Difference]: With dead ends: 255 [2018-10-03 08:36:30,295 INFO L226 Difference]: Without dead ends: 253 [2018-10-03 08:36:30,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:36:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-10-03 08:36:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-10-03 08:36:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-10-03 08:36:30,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 347 transitions. [2018-10-03 08:36:30,301 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 347 transitions. Word has length 243 [2018-10-03 08:36:30,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:30,302 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 347 transitions. [2018-10-03 08:36:30,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-03 08:36:30,302 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 347 transitions. [2018-10-03 08:36:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-03 08:36:30,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:30,303 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-10-03 08:36:30,304 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:30,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:30,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1438460399, now seen corresponding path program 49 times [2018-10-03 08:36:30,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:30,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:30,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:30,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:30,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:31,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:31,600 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 [2018-10-03 08:36:31,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:31,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:33,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:33,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2018-10-03 08:36:33,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-03 08:36:33,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-03 08:36:33,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:36:33,748 INFO L87 Difference]: Start difference. First operand 249 states and 347 transitions. Second operand 102 states. [2018-10-03 08:36:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:34,385 INFO L93 Difference]: Finished difference Result 260 states and 362 transitions. [2018-10-03 08:36:34,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:36:34,386 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 248 [2018-10-03 08:36:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:34,387 INFO L225 Difference]: With dead ends: 260 [2018-10-03 08:36:34,387 INFO L226 Difference]: Without dead ends: 258 [2018-10-03 08:36:34,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:36:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-03 08:36:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2018-10-03 08:36:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-10-03 08:36:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2018-10-03 08:36:34,395 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 248 [2018-10-03 08:36:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:34,395 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2018-10-03 08:36:34,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-03 08:36:34,395 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2018-10-03 08:36:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-03 08:36:34,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:34,397 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1] [2018-10-03 08:36:34,397 INFO L423 AbstractCegarLoop]: === Iteration 52 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:34,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:34,397 INFO L82 PathProgramCache]: Analyzing trace with hash -459176768, now seen corresponding path program 50 times [2018-10-03 08:36:34,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:34,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:34,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:34,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:34,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:35,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:35,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:36:35,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:36:35,958 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:36:35,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:35,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:38,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:38,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 103 [2018-10-03 08:36:38,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-03 08:36:38,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-03 08:36:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:36:38,048 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand 104 states. [2018-10-03 08:36:39,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:39,428 INFO L93 Difference]: Finished difference Result 265 states and 369 transitions. [2018-10-03 08:36:39,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:36:39,428 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 253 [2018-10-03 08:36:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:39,429 INFO L225 Difference]: With dead ends: 265 [2018-10-03 08:36:39,429 INFO L226 Difference]: Without dead ends: 263 [2018-10-03 08:36:39,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:36:39,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-03 08:36:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-10-03 08:36:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-03 08:36:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 361 transitions. [2018-10-03 08:36:39,438 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 361 transitions. Word has length 253 [2018-10-03 08:36:39,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:39,438 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 361 transitions. [2018-10-03 08:36:39,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-03 08:36:39,438 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 361 transitions. [2018-10-03 08:36:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-03 08:36:39,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:39,440 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1] [2018-10-03 08:36:39,440 INFO L423 AbstractCegarLoop]: === Iteration 53 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:39,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:39,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1965053071, now seen corresponding path program 51 times [2018-10-03 08:36:39,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:39,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:39,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:39,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:39,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:41,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:41,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:36:41,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:36:41,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-03 08:36:41,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:41,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:43,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:43,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2018-10-03 08:36:43,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-03 08:36:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-03 08:36:43,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:36:43,420 INFO L87 Difference]: Start difference. First operand 259 states and 361 transitions. Second operand 106 states. [2018-10-03 08:36:44,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:44,024 INFO L93 Difference]: Finished difference Result 270 states and 376 transitions. [2018-10-03 08:36:44,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:36:44,024 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 258 [2018-10-03 08:36:44,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:44,025 INFO L225 Difference]: With dead ends: 270 [2018-10-03 08:36:44,025 INFO L226 Difference]: Without dead ends: 268 [2018-10-03 08:36:44,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:36:44,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-10-03 08:36:44,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2018-10-03 08:36:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-10-03 08:36:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 368 transitions. [2018-10-03 08:36:44,032 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 368 transitions. Word has length 258 [2018-10-03 08:36:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:44,032 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 368 transitions. [2018-10-03 08:36:44,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-03 08:36:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 368 transitions. [2018-10-03 08:36:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-03 08:36:44,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:44,034 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1] [2018-10-03 08:36:44,034 INFO L423 AbstractCegarLoop]: === Iteration 54 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:44,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:44,034 INFO L82 PathProgramCache]: Analyzing trace with hash 563284832, now seen corresponding path program 52 times [2018-10-03 08:36:44,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:44,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:44,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:44,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:44,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:45,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:45,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:36:45,346 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:36:45,409 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:36:45,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:45,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:47,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:47,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 107 [2018-10-03 08:36:47,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-03 08:36:47,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-03 08:36:47,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:36:47,805 INFO L87 Difference]: Start difference. First operand 264 states and 368 transitions. Second operand 108 states. [2018-10-03 08:36:48,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:48,398 INFO L93 Difference]: Finished difference Result 275 states and 383 transitions. [2018-10-03 08:36:48,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:36:48,399 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 263 [2018-10-03 08:36:48,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:48,400 INFO L225 Difference]: With dead ends: 275 [2018-10-03 08:36:48,400 INFO L226 Difference]: Without dead ends: 273 [2018-10-03 08:36:48,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:36:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-10-03 08:36:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2018-10-03 08:36:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-03 08:36:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2018-10-03 08:36:48,407 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 263 [2018-10-03 08:36:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:48,407 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2018-10-03 08:36:48,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-03 08:36:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2018-10-03 08:36:48,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-03 08:36:48,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:48,409 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1] [2018-10-03 08:36:48,409 INFO L423 AbstractCegarLoop]: === Iteration 55 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:48,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:48,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1996048593, now seen corresponding path program 53 times [2018-10-03 08:36:48,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:48,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:48,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:48,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:48,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:49,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:49,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:36:49,783 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:36:49,906 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-03 08:36:49,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:49,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:52,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:52,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 109 [2018-10-03 08:36:52,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-03 08:36:52,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-03 08:36:52,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:36:52,410 INFO L87 Difference]: Start difference. First operand 269 states and 375 transitions. Second operand 110 states. [2018-10-03 08:36:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:53,042 INFO L93 Difference]: Finished difference Result 280 states and 390 transitions. [2018-10-03 08:36:53,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:36:53,042 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 268 [2018-10-03 08:36:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:53,043 INFO L225 Difference]: With dead ends: 280 [2018-10-03 08:36:53,043 INFO L226 Difference]: Without dead ends: 278 [2018-10-03 08:36:53,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:36:53,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-03 08:36:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2018-10-03 08:36:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-10-03 08:36:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 382 transitions. [2018-10-03 08:36:53,050 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 382 transitions. Word has length 268 [2018-10-03 08:36:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:53,051 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 382 transitions. [2018-10-03 08:36:53,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-03 08:36:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 382 transitions. [2018-10-03 08:36:53,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-10-03 08:36:53,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:53,052 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1] [2018-10-03 08:36:53,052 INFO L423 AbstractCegarLoop]: === Iteration 56 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:53,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:53,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1774504448, now seen corresponding path program 54 times [2018-10-03 08:36:53,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:53,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:53,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:53,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:53,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:54,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:54,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:36:54,481 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:36:54,620 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-03 08:36:54,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:36:54,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:36:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:57,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:36:57,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 111 [2018-10-03 08:36:57,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-03 08:36:57,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-03 08:36:57,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-03 08:36:57,257 INFO L87 Difference]: Start difference. First operand 274 states and 382 transitions. Second operand 112 states. [2018-10-03 08:36:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:36:57,967 INFO L93 Difference]: Finished difference Result 285 states and 397 transitions. [2018-10-03 08:36:57,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:36:57,968 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 273 [2018-10-03 08:36:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:36:57,969 INFO L225 Difference]: With dead ends: 285 [2018-10-03 08:36:57,969 INFO L226 Difference]: Without dead ends: 283 [2018-10-03 08:36:57,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-03 08:36:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-10-03 08:36:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-10-03 08:36:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-10-03 08:36:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 389 transitions. [2018-10-03 08:36:57,977 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 389 transitions. Word has length 273 [2018-10-03 08:36:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:36:57,978 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 389 transitions. [2018-10-03 08:36:57,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-03 08:36:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 389 transitions. [2018-10-03 08:36:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-03 08:36:57,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:36:57,979 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1] [2018-10-03 08:36:57,979 INFO L423 AbstractCegarLoop]: === Iteration 57 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:36:57,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:36:57,980 INFO L82 PathProgramCache]: Analyzing trace with hash -281694671, now seen corresponding path program 55 times [2018-10-03 08:36:57,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:36:57,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:36:57,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:57,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:36:57,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:36:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:36:59,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:36:59,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:36:59,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:36:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:36:59,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:02,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:02,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 113 [2018-10-03 08:37:02,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-03 08:37:02,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-03 08:37:02,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-03 08:37:02,165 INFO L87 Difference]: Start difference. First operand 279 states and 389 transitions. Second operand 114 states. [2018-10-03 08:37:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:02,937 INFO L93 Difference]: Finished difference Result 290 states and 404 transitions. [2018-10-03 08:37:02,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:37:02,937 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 278 [2018-10-03 08:37:02,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:02,938 INFO L225 Difference]: With dead ends: 290 [2018-10-03 08:37:02,938 INFO L226 Difference]: Without dead ends: 288 [2018-10-03 08:37:02,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-03 08:37:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-10-03 08:37:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2018-10-03 08:37:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-10-03 08:37:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 396 transitions. [2018-10-03 08:37:02,944 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 396 transitions. Word has length 278 [2018-10-03 08:37:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:02,945 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 396 transitions. [2018-10-03 08:37:02,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-03 08:37:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 396 transitions. [2018-10-03 08:37:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-10-03 08:37:02,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:02,946 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1] [2018-10-03 08:37:02,946 INFO L423 AbstractCegarLoop]: === Iteration 58 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:02,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:02,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1269776224, now seen corresponding path program 56 times [2018-10-03 08:37:02,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:02,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:02,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:02,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:37:02,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:04,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:04,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:37:04,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:37:04,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:37:04,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:04,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:07,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:07,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 115 [2018-10-03 08:37:07,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-03 08:37:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-03 08:37:07,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-03 08:37:07,381 INFO L87 Difference]: Start difference. First operand 284 states and 396 transitions. Second operand 116 states. [2018-10-03 08:37:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:08,096 INFO L93 Difference]: Finished difference Result 295 states and 411 transitions. [2018-10-03 08:37:08,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:37:08,096 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 283 [2018-10-03 08:37:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:08,098 INFO L225 Difference]: With dead ends: 295 [2018-10-03 08:37:08,098 INFO L226 Difference]: Without dead ends: 293 [2018-10-03 08:37:08,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-03 08:37:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-10-03 08:37:08,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2018-10-03 08:37:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-10-03 08:37:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 403 transitions. [2018-10-03 08:37:08,104 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 403 transitions. Word has length 283 [2018-10-03 08:37:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:08,104 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 403 transitions. [2018-10-03 08:37:08,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-03 08:37:08,104 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 403 transitions. [2018-10-03 08:37:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-10-03 08:37:08,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:08,105 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1] [2018-10-03 08:37:08,106 INFO L423 AbstractCegarLoop]: === Iteration 59 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:08,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:08,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1555749777, now seen corresponding path program 57 times [2018-10-03 08:37:08,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:08,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:08,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:08,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:08,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:10,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:10,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:37:10,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:37:10,257 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-03 08:37:10,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:10,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:13,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:13,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 117 [2018-10-03 08:37:13,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-03 08:37:13,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-03 08:37:13,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-03 08:37:13,054 INFO L87 Difference]: Start difference. First operand 289 states and 403 transitions. Second operand 118 states. [2018-10-03 08:37:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:13,839 INFO L93 Difference]: Finished difference Result 300 states and 418 transitions. [2018-10-03 08:37:13,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:37:13,839 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 288 [2018-10-03 08:37:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:13,841 INFO L225 Difference]: With dead ends: 300 [2018-10-03 08:37:13,841 INFO L226 Difference]: Without dead ends: 298 [2018-10-03 08:37:13,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-03 08:37:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-10-03 08:37:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2018-10-03 08:37:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-10-03 08:37:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 410 transitions. [2018-10-03 08:37:13,849 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 410 transitions. Word has length 288 [2018-10-03 08:37:13,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:13,849 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 410 transitions. [2018-10-03 08:37:13,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-03 08:37:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 410 transitions. [2018-10-03 08:37:13,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-03 08:37:13,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:13,851 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1] [2018-10-03 08:37:13,851 INFO L423 AbstractCegarLoop]: === Iteration 60 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:13,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:13,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1607528256, now seen corresponding path program 58 times [2018-10-03 08:37:13,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:13,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:13,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:13,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:13,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:15,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:15,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:37:15,504 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:37:15,578 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:37:15,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:15,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:18,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:18,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 119 [2018-10-03 08:37:18,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-03 08:37:18,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-03 08:37:18,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-03 08:37:18,691 INFO L87 Difference]: Start difference. First operand 294 states and 410 transitions. Second operand 120 states. [2018-10-03 08:37:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:19,448 INFO L93 Difference]: Finished difference Result 305 states and 425 transitions. [2018-10-03 08:37:19,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:37:19,448 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 293 [2018-10-03 08:37:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:19,450 INFO L225 Difference]: With dead ends: 305 [2018-10-03 08:37:19,450 INFO L226 Difference]: Without dead ends: 303 [2018-10-03 08:37:19,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-03 08:37:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-03 08:37:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2018-10-03 08:37:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-03 08:37:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 417 transitions. [2018-10-03 08:37:19,457 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 417 transitions. Word has length 293 [2018-10-03 08:37:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:19,457 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 417 transitions. [2018-10-03 08:37:19,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-03 08:37:19,457 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 417 transitions. [2018-10-03 08:37:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-03 08:37:19,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:19,459 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1] [2018-10-03 08:37:19,459 INFO L423 AbstractCegarLoop]: === Iteration 61 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:19,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1898893553, now seen corresponding path program 59 times [2018-10-03 08:37:19,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:19,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:19,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:19,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:19,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:21,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:21,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:37:21,135 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:37:21,269 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-03 08:37:21,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:21,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:24,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:24,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 121 [2018-10-03 08:37:24,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-03 08:37:24,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-03 08:37:24,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-03 08:37:24,290 INFO L87 Difference]: Start difference. First operand 299 states and 417 transitions. Second operand 122 states. [2018-10-03 08:37:25,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:25,154 INFO L93 Difference]: Finished difference Result 310 states and 432 transitions. [2018-10-03 08:37:25,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:37:25,154 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 298 [2018-10-03 08:37:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:25,156 INFO L225 Difference]: With dead ends: 310 [2018-10-03 08:37:25,156 INFO L226 Difference]: Without dead ends: 308 [2018-10-03 08:37:25,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-03 08:37:25,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-10-03 08:37:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2018-10-03 08:37:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-03 08:37:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 424 transitions. [2018-10-03 08:37:25,162 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 424 transitions. Word has length 298 [2018-10-03 08:37:25,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:25,162 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 424 transitions. [2018-10-03 08:37:25,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-03 08:37:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 424 transitions. [2018-10-03 08:37:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-03 08:37:25,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:25,164 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1] [2018-10-03 08:37:25,164 INFO L423 AbstractCegarLoop]: === Iteration 62 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:25,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:25,164 INFO L82 PathProgramCache]: Analyzing trace with hash -765504032, now seen corresponding path program 60 times [2018-10-03 08:37:25,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:25,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:25,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:25,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:25,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:27,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:27,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:37:27,181 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:37:27,332 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-03 08:37:27,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:27,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:30,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:30,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 123 [2018-10-03 08:37:30,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-03 08:37:30,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-03 08:37:30,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-03 08:37:30,242 INFO L87 Difference]: Start difference. First operand 304 states and 424 transitions. Second operand 124 states. [2018-10-03 08:37:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:31,127 INFO L93 Difference]: Finished difference Result 315 states and 439 transitions. [2018-10-03 08:37:31,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:37:31,128 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 303 [2018-10-03 08:37:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:31,129 INFO L225 Difference]: With dead ends: 315 [2018-10-03 08:37:31,129 INFO L226 Difference]: Without dead ends: 313 [2018-10-03 08:37:31,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-03 08:37:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-10-03 08:37:31,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2018-10-03 08:37:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-10-03 08:37:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 431 transitions. [2018-10-03 08:37:31,135 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 431 transitions. Word has length 303 [2018-10-03 08:37:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:31,136 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 431 transitions. [2018-10-03 08:37:31,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-03 08:37:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 431 transitions. [2018-10-03 08:37:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-10-03 08:37:31,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:31,137 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1] [2018-10-03 08:37:31,137 INFO L423 AbstractCegarLoop]: === Iteration 63 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:31,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:31,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2034790831, now seen corresponding path program 61 times [2018-10-03 08:37:31,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:31,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:31,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:31,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:31,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:33,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:33,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:37:33,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:37:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:33,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:36,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:36,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 125 [2018-10-03 08:37:36,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-03 08:37:36,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-03 08:37:36,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-03 08:37:36,173 INFO L87 Difference]: Start difference. First operand 309 states and 431 transitions. Second operand 126 states. [2018-10-03 08:37:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:37,091 INFO L93 Difference]: Finished difference Result 320 states and 446 transitions. [2018-10-03 08:37:37,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:37:37,091 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 308 [2018-10-03 08:37:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:37,093 INFO L225 Difference]: With dead ends: 320 [2018-10-03 08:37:37,093 INFO L226 Difference]: Without dead ends: 318 [2018-10-03 08:37:37,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-03 08:37:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-10-03 08:37:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2018-10-03 08:37:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-10-03 08:37:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 438 transitions. [2018-10-03 08:37:37,099 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 438 transitions. Word has length 308 [2018-10-03 08:37:37,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:37,100 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 438 transitions. [2018-10-03 08:37:37,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-03 08:37:37,100 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 438 transitions. [2018-10-03 08:37:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-03 08:37:37,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:37,101 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1] [2018-10-03 08:37:37,102 INFO L423 AbstractCegarLoop]: === Iteration 64 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:37,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:37,102 INFO L82 PathProgramCache]: Analyzing trace with hash 429257856, now seen corresponding path program 62 times [2018-10-03 08:37:37,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:37,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:37,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:37,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:37:37,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:38,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:38,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:37:38,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:37:39,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:37:39,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:39,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:42,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:42,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 127 [2018-10-03 08:37:42,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-03 08:37:42,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-03 08:37:42,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-03 08:37:42,355 INFO L87 Difference]: Start difference. First operand 314 states and 438 transitions. Second operand 128 states. [2018-10-03 08:37:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:43,337 INFO L93 Difference]: Finished difference Result 325 states and 453 transitions. [2018-10-03 08:37:43,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:37:43,337 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 313 [2018-10-03 08:37:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:43,339 INFO L225 Difference]: With dead ends: 325 [2018-10-03 08:37:43,339 INFO L226 Difference]: Without dead ends: 323 [2018-10-03 08:37:43,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-03 08:37:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-03 08:37:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2018-10-03 08:37:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-10-03 08:37:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2018-10-03 08:37:43,349 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 313 [2018-10-03 08:37:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:43,349 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2018-10-03 08:37:43,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-03 08:37:43,349 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2018-10-03 08:37:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-10-03 08:37:43,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:43,351 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1] [2018-10-03 08:37:43,351 INFO L423 AbstractCegarLoop]: === Iteration 65 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:43,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash -322639, now seen corresponding path program 63 times [2018-10-03 08:37:43,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:43,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:43,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:43,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:43,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:45,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:45,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:37:45,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:37:45,436 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-03 08:37:45,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:45,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:48,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:48,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 129 [2018-10-03 08:37:48,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-03 08:37:48,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-03 08:37:48,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-03 08:37:48,863 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand 130 states. [2018-10-03 08:37:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:49,879 INFO L93 Difference]: Finished difference Result 330 states and 460 transitions. [2018-10-03 08:37:49,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:37:49,880 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 318 [2018-10-03 08:37:49,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:49,881 INFO L225 Difference]: With dead ends: 330 [2018-10-03 08:37:49,881 INFO L226 Difference]: Without dead ends: 328 [2018-10-03 08:37:49,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-03 08:37:49,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-10-03 08:37:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2018-10-03 08:37:49,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-10-03 08:37:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 452 transitions. [2018-10-03 08:37:49,888 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 452 transitions. Word has length 318 [2018-10-03 08:37:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:49,889 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 452 transitions. [2018-10-03 08:37:49,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-03 08:37:49,889 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 452 transitions. [2018-10-03 08:37:49,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-10-03 08:37:49,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:49,890 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1] [2018-10-03 08:37:49,890 INFO L423 AbstractCegarLoop]: === Iteration 66 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:49,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:49,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1970353376, now seen corresponding path program 64 times [2018-10-03 08:37:49,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:49,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:49,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:49,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:49,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:51,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:51,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:37:51,893 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:37:51,971 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:37:51,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:51,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:37:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:55,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:37:55,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 131 [2018-10-03 08:37:55,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-03 08:37:55,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-03 08:37:55,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-03 08:37:55,358 INFO L87 Difference]: Start difference. First operand 324 states and 452 transitions. Second operand 132 states. [2018-10-03 08:37:56,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:37:56,353 INFO L93 Difference]: Finished difference Result 335 states and 467 transitions. [2018-10-03 08:37:56,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:37:56,354 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 323 [2018-10-03 08:37:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:37:56,355 INFO L225 Difference]: With dead ends: 335 [2018-10-03 08:37:56,355 INFO L226 Difference]: Without dead ends: 333 [2018-10-03 08:37:56,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-03 08:37:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-10-03 08:37:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 329. [2018-10-03 08:37:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-10-03 08:37:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 459 transitions. [2018-10-03 08:37:56,362 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 459 transitions. Word has length 323 [2018-10-03 08:37:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:37:56,362 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 459 transitions. [2018-10-03 08:37:56,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-03 08:37:56,362 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 459 transitions. [2018-10-03 08:37:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-10-03 08:37:56,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:37:56,364 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1] [2018-10-03 08:37:56,364 INFO L423 AbstractCegarLoop]: === Iteration 67 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:37:56,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:37:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1474338543, now seen corresponding path program 65 times [2018-10-03 08:37:56,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:37:56,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:37:56,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:56,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:37:56,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:37:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:37:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:37:58,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:37:58,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-03 08:37:58,623 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:37:58,781 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-03 08:37:58,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:37:58,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:02,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:02,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-10-03 08:38:02,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-03 08:38:02,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-03 08:38:02,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-03 08:38:02,135 INFO L87 Difference]: Start difference. First operand 329 states and 459 transitions. Second operand 134 states. [2018-10-03 08:38:03,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:03,170 INFO L93 Difference]: Finished difference Result 340 states and 474 transitions. [2018-10-03 08:38:03,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:38:03,170 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 328 [2018-10-03 08:38:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:03,171 INFO L225 Difference]: With dead ends: 340 [2018-10-03 08:38:03,172 INFO L226 Difference]: Without dead ends: 338 [2018-10-03 08:38:03,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-03 08:38:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-03 08:38:03,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2018-10-03 08:38:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2018-10-03 08:38:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 466 transitions. [2018-10-03 08:38:03,179 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 466 transitions. Word has length 328 [2018-10-03 08:38:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:03,179 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 466 transitions. [2018-10-03 08:38:03,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-03 08:38:03,180 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 466 transitions. [2018-10-03 08:38:03,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-10-03 08:38:03,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:03,181 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1] [2018-10-03 08:38:03,181 INFO L423 AbstractCegarLoop]: === Iteration 68 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:03,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:03,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1642322368, now seen corresponding path program 66 times [2018-10-03 08:38:03,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:03,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:03,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:03,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:03,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:05,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:05,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:38:05,302 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:38:05,461 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-03 08:38:05,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:05,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:09,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:09,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 135 [2018-10-03 08:38:09,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-03 08:38:09,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-03 08:38:09,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-03 08:38:09,066 INFO L87 Difference]: Start difference. First operand 334 states and 466 transitions. Second operand 136 states. [2018-10-03 08:38:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:10,023 INFO L93 Difference]: Finished difference Result 345 states and 481 transitions. [2018-10-03 08:38:10,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:38:10,023 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 333 [2018-10-03 08:38:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:10,024 INFO L225 Difference]: With dead ends: 345 [2018-10-03 08:38:10,025 INFO L226 Difference]: Without dead ends: 343 [2018-10-03 08:38:10,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-03 08:38:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-10-03 08:38:10,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2018-10-03 08:38:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-10-03 08:38:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 473 transitions. [2018-10-03 08:38:10,033 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 473 transitions. Word has length 333 [2018-10-03 08:38:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:10,034 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 473 transitions. [2018-10-03 08:38:10,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-03 08:38:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 473 transitions. [2018-10-03 08:38:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-03 08:38:10,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:10,035 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1] [2018-10-03 08:38:10,036 INFO L423 AbstractCegarLoop]: === Iteration 69 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:10,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:10,036 INFO L82 PathProgramCache]: Analyzing trace with hash 315258481, now seen corresponding path program 67 times [2018-10-03 08:38:10,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:10,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:10,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:10,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:10,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:12,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:12,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:38:12,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:38:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:12,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:16,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:16,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 137 [2018-10-03 08:38:16,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-03 08:38:16,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-03 08:38:16,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-03 08:38:16,120 INFO L87 Difference]: Start difference. First operand 339 states and 473 transitions. Second operand 138 states. [2018-10-03 08:38:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:17,285 INFO L93 Difference]: Finished difference Result 350 states and 488 transitions. [2018-10-03 08:38:17,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:38:17,285 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 338 [2018-10-03 08:38:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:17,286 INFO L225 Difference]: With dead ends: 350 [2018-10-03 08:38:17,286 INFO L226 Difference]: Without dead ends: 348 [2018-10-03 08:38:17,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-03 08:38:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-10-03 08:38:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2018-10-03 08:38:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-10-03 08:38:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 480 transitions. [2018-10-03 08:38:17,293 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 480 transitions. Word has length 338 [2018-10-03 08:38:17,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:17,294 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 480 transitions. [2018-10-03 08:38:17,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-03 08:38:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 480 transitions. [2018-10-03 08:38:17,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-10-03 08:38:17,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:17,295 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 1, 1, 1] [2018-10-03 08:38:17,295 INFO L423 AbstractCegarLoop]: === Iteration 70 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:17,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:17,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1672421472, now seen corresponding path program 68 times [2018-10-03 08:38:17,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:17,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:17,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:17,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:38:17,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:19,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:19,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:38:19,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:38:19,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:38:19,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:19,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:23,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:23,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 139 [2018-10-03 08:38:23,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-03 08:38:23,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-03 08:38:23,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-03 08:38:23,646 INFO L87 Difference]: Start difference. First operand 344 states and 480 transitions. Second operand 140 states. [2018-10-03 08:38:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:24,805 INFO L93 Difference]: Finished difference Result 355 states and 495 transitions. [2018-10-03 08:38:24,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:38:24,805 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 343 [2018-10-03 08:38:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:24,807 INFO L225 Difference]: With dead ends: 355 [2018-10-03 08:38:24,807 INFO L226 Difference]: Without dead ends: 353 [2018-10-03 08:38:24,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-03 08:38:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2018-10-03 08:38:24,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 349. [2018-10-03 08:38:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-10-03 08:38:24,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 487 transitions. [2018-10-03 08:38:24,814 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 487 transitions. Word has length 343 [2018-10-03 08:38:24,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:24,814 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 487 transitions. [2018-10-03 08:38:24,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-03 08:38:24,814 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 487 transitions. [2018-10-03 08:38:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-10-03 08:38:24,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:24,816 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 1, 1, 1] [2018-10-03 08:38:24,816 INFO L423 AbstractCegarLoop]: === Iteration 71 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:24,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:24,816 INFO L82 PathProgramCache]: Analyzing trace with hash -64859183, now seen corresponding path program 69 times [2018-10-03 08:38:24,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:24,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:24,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:24,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:24,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:27,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:27,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:38:27,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:38:27,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-03 08:38:27,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:27,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:31,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:31,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 141 [2018-10-03 08:38:31,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-03 08:38:31,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-03 08:38:31,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-03 08:38:31,338 INFO L87 Difference]: Start difference. First operand 349 states and 487 transitions. Second operand 142 states. [2018-10-03 08:38:32,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:32,523 INFO L93 Difference]: Finished difference Result 360 states and 502 transitions. [2018-10-03 08:38:32,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:38:32,523 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 348 [2018-10-03 08:38:32,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:32,525 INFO L225 Difference]: With dead ends: 360 [2018-10-03 08:38:32,525 INFO L226 Difference]: Without dead ends: 358 [2018-10-03 08:38:32,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-03 08:38:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-10-03 08:38:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2018-10-03 08:38:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-10-03 08:38:32,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 494 transitions. [2018-10-03 08:38:32,532 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 494 transitions. Word has length 348 [2018-10-03 08:38:32,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:32,532 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 494 transitions. [2018-10-03 08:38:32,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-03 08:38:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 494 transitions. [2018-10-03 08:38:32,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-10-03 08:38:32,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:32,534 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 1, 1, 1] [2018-10-03 08:38:32,534 INFO L423 AbstractCegarLoop]: === Iteration 72 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:32,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:32,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2072682240, now seen corresponding path program 70 times [2018-10-03 08:38:32,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:32,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:32,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:32,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:32,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:38:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:35,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:38:35,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:38:35,047 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:38:35,135 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:38:35,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:38:35,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:38:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:38:39,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:38:39,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 143 [2018-10-03 08:38:39,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-03 08:38:39,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-03 08:38:39,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-03 08:38:39,282 INFO L87 Difference]: Start difference. First operand 354 states and 494 transitions. Second operand 144 states. [2018-10-03 08:38:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:38:40,525 INFO L93 Difference]: Finished difference Result 365 states and 509 transitions. [2018-10-03 08:38:40,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:38:40,525 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 353 [2018-10-03 08:38:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:38:40,526 INFO L225 Difference]: With dead ends: 365 [2018-10-03 08:38:40,527 INFO L226 Difference]: Without dead ends: 363 [2018-10-03 08:38:40,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-03 08:38:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-03 08:38:40,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 359. [2018-10-03 08:38:40,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-10-03 08:38:40,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 501 transitions. [2018-10-03 08:38:40,534 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 501 transitions. Word has length 353 [2018-10-03 08:38:40,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:38:40,534 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 501 transitions. [2018-10-03 08:38:40,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-03 08:38:40,534 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 501 transitions. [2018-10-03 08:38:40,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-10-03 08:38:40,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:38:40,536 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 1, 1, 1] [2018-10-03 08:38:40,536 INFO L423 AbstractCegarLoop]: === Iteration 73 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:38:40,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:38:40,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1462961871, now seen corresponding path program 71 times [2018-10-03 08:38:40,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:38:40,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:38:40,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:40,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:38:40,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:38:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:38:42,215 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:38:42,219 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:38:42,219 INFO L202 PluginConnector]: Adding new model RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:38:42 BoogieIcfgContainer [2018-10-03 08:38:42,219 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:38:42,220 INFO L168 Benchmark]: Toolchain (without parser) took 238118.79 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 56.1 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 176.3 MB). Peak memory consumption was 232.4 MB. Max. memory is 7.1 GB. [2018-10-03 08:38:42,221 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 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. [2018-10-03 08:38:42,222 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.98 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. [2018-10-03 08:38:42,222 INFO L168 Benchmark]: Boogie Preprocessor took 29.43 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. [2018-10-03 08:38:42,222 INFO L168 Benchmark]: RCFGBuilder took 375.77 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. [2018-10-03 08:38:42,223 INFO L168 Benchmark]: TraceAbstraction took 237661.30 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 56.1 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 155.1 MB). Peak memory consumption was 211.2 MB. Max. memory is 7.1 GB. [2018-10-03 08:38:42,225 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 0.21 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 45.98 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 29.43 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 375.77 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 237661.30 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 56.1 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 155.1 MB). Peak memory consumption was 211.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 39]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 39). Cancelled while BasicCegarLoop was analyzing trace of length 359 with TraceHistMax 71, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 62 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 237.5s OverallTime, 73 OverallIterations, 71 TraceHistogramMax, 34.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 589 SDtfs, 29245 SDslu, 21520 SDs, 0 SdLazy, 10196 SolverSat, 199 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15194 GetRequests, 10082 SyntacticMatches, 0 SemanticMatches, 5112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238560 ImplicationChecksByTransitivity, 170.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=359occurred in iteration=72, 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: 0.4s AutomataMinimizationTime, 72 MinimizatonAttempts, 284 StatesRemovedByMinimization, 71 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 5.1s SatisfiabilityAnalysisTime, 189.2s InterpolantComputationTime, 25280 NumberOfCodeBlocks, 25280 NumberOfCodeBlocksAsserted, 1379 NumberOfCheckSat, 25138 ConstructedInterpolants, 12495 QuantifiedInterpolants, 56213688 SizeOfPredicates, 2695 NumberOfNonLiveVariables, 23485 ConjunctsInSsa, 5250 ConjunctsInUnsatCore, 142 InterpolantComputations, 2 PerfectInterpolantSequences, 1/576521 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/RailwayCrossing.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-38-42-234.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/RailwayCrossing.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-38-42-234.csv Completed graceful shutdown