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-c372c2b [2018-10-02 11:34:51,192 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:34:51,194 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:34:51,206 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:34:51,206 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:34:51,208 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:34:51,209 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:34:51,211 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:34:51,213 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:34:51,214 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:34:51,215 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:34:51,240 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 [2018-10-02 11:34:51,255 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:34:51,256 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:34:51,257 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:34:51,257 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:34:51,257 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:34:51,258 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:34:51,258 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:34:51,258 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:34:51,258 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:34:51,259 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:34:51,259 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:34:51,259 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:34:51,259 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:34:51,259 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:34:51,259 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:34:51,260 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:34:51,260 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:34:51,260 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:34:51,260 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:34:51,260 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:34:51,261 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:34:51,261 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:34:51,261 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:34:51,261 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:34:51,261 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:34:51,262 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:34:51,262 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:34:51,262 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:34:51,262 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:34:51,262 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:34:51,307 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:34:51,321 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:34:51,324 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:34:51,326 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:34:51,327 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:34:51,328 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl [2018-10-02 11:34:51,328 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl' [2018-10-02 11:34:51,392 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:34:51,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:34:51,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:34:51,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:34:51,400 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:34:51,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:34:51" (1/1) ... [2018-10-02 11:34:51,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:34:51" (1/1) ... [2018-10-02 11:34:51,439 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-02 11:34:51,439 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-02 11:34:51,440 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-02 11:34:51,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:34:51,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:34:51,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:34:51,443 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:34:51,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:34:51" (1/1) ... [2018-10-02 11:34:51,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:34:51" (1/1) ... [2018-10-02 11:34:51,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:34:51" (1/1) ... [2018-10-02 11:34:51,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:34:51" (1/1) ... [2018-10-02 11:34:51,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:34:51" (1/1) ... [2018-10-02 11:34:51,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:34:51" (1/1) ... [2018-10-02 11:34:51,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:34:51" (1/1) ... [2018-10-02 11:34:51,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:34:51,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:34:51,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:34:51,470 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:34:51,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:34:51" (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 [2018-10-02 11:34:51,537 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-10-02 11:34:51,538 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-10-02 11:34:51,538 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-10-02 11:34:51,876 INFO L337 CfgBuilder]: Using library mode [2018-10-02 11:34:51,876 INFO L202 PluginConnector]: Adding new model RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:34:51 BoogieIcfgContainer [2018-10-02 11:34:51,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:34:51,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:34:51,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:34:51,885 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:34:51,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:34:51" (1/2) ... [2018-10-02 11:34:51,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7422aad7 and model type RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:34:51, skipping insertion in model container [2018-10-02 11:34:51,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:34:51" (2/2) ... [2018-10-02 11:34:51,890 INFO L112 eAbstractionObserver]: Analyzing ICFG RailwayCrossing.bpl [2018-10-02 11:34:51,901 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:34:51,912 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:34:51,962 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:34:51,963 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:34:51,963 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:34:51,963 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:34:51,963 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:34:51,964 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:34:51,964 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:34:51,964 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:34:51,964 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:34:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-10-02 11:34:51,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 11:34:51,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:34:51,988 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 11:34:51,989 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:34:51,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:34:51,999 INFO L82 PathProgramCache]: Analyzing trace with hash 30496, now seen corresponding path program 1 times [2018-10-02 11:34:52,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:34:52,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:34:52,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:52,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:34:52,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:52,150 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:34:52,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:34:52,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:34:52,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:34:52,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:34:52,171 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-10-02 11:34:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:34:52,206 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-10-02 11:34:52,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:34:52,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-02 11:34:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:34:52,219 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:34:52,219 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:34:52,223 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 [2018-10-02 11:34:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:34:52,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-10-02 11:34:52,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:34:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2018-10-02 11:34:52,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 3 [2018-10-02 11:34:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:34:52,261 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2018-10-02 11:34:52,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:34:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2018-10-02 11:34:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:34:52,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:34:52,262 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-02 11:34:52,262 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:34:52,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:34:52,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1863215691, now seen corresponding path program 1 times [2018-10-02 11:34:52,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:34:52,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:34:52,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:52,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:34:52,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:52,317 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:34:52,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:34:52,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:34:52,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:34:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:34:52,320 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand 3 states. [2018-10-02 11:34:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:34:52,355 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2018-10-02 11:34:52,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:34:52,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-02 11:34:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:34:52,357 INFO L225 Difference]: With dead ends: 16 [2018-10-02 11:34:52,357 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 11:34:52,359 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 [2018-10-02 11:34:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 11:34:52,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 11:34:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:34:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-10-02 11:34:52,362 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2018-10-02 11:34:52,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:34:52,362 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-10-02 11:34:52,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:34:52,362 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-10-02 11:34:52,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:34:52,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:34:52,363 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-02 11:34:52,363 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:34:52,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:34:52,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1926837521, now seen corresponding path program 1 times [2018-10-02 11:34:52,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:34:52,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:34:52,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:52,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:34:52,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:52,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:34:52,505 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 [2018-10-02 11:34:52,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:34:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:52,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:34:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:52,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:34:52,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2018-10-02 11:34:52,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:34:52,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:34:52,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:34:52,961 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 6 states. [2018-10-02 11:34:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:34:53,044 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-10-02 11:34:53,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:34:53,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-10-02 11:34:53,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:34:53,047 INFO L225 Difference]: With dead ends: 20 [2018-10-02 11:34:53,047 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 11:34:53,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:34:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 11:34:53,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-10-02 11:34:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:34:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-10-02 11:34:53,057 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-10-02 11:34:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:34:53,058 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-10-02 11:34:53,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:34:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-10-02 11:34:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:34:53,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:34:53,060 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-10-02 11:34:53,060 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:34:53,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:34:53,061 INFO L82 PathProgramCache]: Analyzing trace with hash 640583104, now seen corresponding path program 2 times [2018-10-02 11:34:53,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:34:53,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:34:53,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:53,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:34:53,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:53,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:34:53,234 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 [2018-10-02 11:34:53,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:34:53,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:34:53,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:34:53,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:34:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:53,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:34:53,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-10-02 11:34:53,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:34:53,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:34:53,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:34:53,594 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 8 states. [2018-10-02 11:34:53,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:34:53,758 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2018-10-02 11:34:53,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:34:53,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-02 11:34:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:34:53,759 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:34:53,761 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:34:53,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:34:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:34:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-02 11:34:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:34:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-10-02 11:34:53,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 13 [2018-10-02 11:34:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:34:53,777 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-10-02 11:34:53,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:34:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2018-10-02 11:34:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:34:53,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:34:53,778 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-10-02 11:34:53,779 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:34:53,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:34:53,779 INFO L82 PathProgramCache]: Analyzing trace with hash -297055631, now seen corresponding path program 3 times [2018-10-02 11:34:53,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:34:53,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:34:53,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:53,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:34:53,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:53,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:34:53,928 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 [2018-10-02 11:34:53,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:34:53,955 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:34:53,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:34:53,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:34:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:54,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:34:54,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-02 11:34:54,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:34:54,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:34:54,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:34:54,143 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 10 states. [2018-10-02 11:34:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:34:54,191 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2018-10-02 11:34:54,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:34:54,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-02 11:34:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:34:54,193 INFO L225 Difference]: With dead ends: 30 [2018-10-02 11:34:54,193 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 11:34:54,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:34:54,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 11:34:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-10-02 11:34:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:34:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2018-10-02 11:34:54,199 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 18 [2018-10-02 11:34:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:34:54,200 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2018-10-02 11:34:54,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:34:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2018-10-02 11:34:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 11:34:54,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:34:54,201 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-10-02 11:34:54,201 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:34:54,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:34:54,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2073218144, now seen corresponding path program 4 times [2018-10-02 11:34:54,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:34:54,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:34:54,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:54,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:34:54,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:54,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:34:54,414 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 [2018-10-02 11:34:54,422 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:34:54,452 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:34:54,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:34:54,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:34:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:54,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:34:54,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-02 11:34:54,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:34:54,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:34:54,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:34:54,711 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 12 states. [2018-10-02 11:34:54,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:34:54,829 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2018-10-02 11:34:54,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:34:54,831 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-10-02 11:34:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:34:54,832 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:34:54,832 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:34:54,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:34:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:34:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-10-02 11:34:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 11:34:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2018-10-02 11:34:54,839 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 23 [2018-10-02 11:34:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:34:54,839 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2018-10-02 11:34:54,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:34:54,840 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2018-10-02 11:34:54,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 11:34:54,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:34:54,841 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-10-02 11:34:54,842 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:34:54,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:34:54,842 INFO L82 PathProgramCache]: Analyzing trace with hash -609605679, now seen corresponding path program 5 times [2018-10-02 11:34:54,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:34:54,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:34:54,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:54,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:34:54,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:55,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:34:55,326 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 [2018-10-02 11:34:55,335 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:34:55,364 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:34:55,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:34:55,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:34:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:55,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:34:55,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-02 11:34:55,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:34:55,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:34:55,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:34:55,813 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 14 states. [2018-10-02 11:34:56,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:34:56,045 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2018-10-02 11:34:56,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:34:56,046 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2018-10-02 11:34:56,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:34:56,047 INFO L225 Difference]: With dead ends: 40 [2018-10-02 11:34:56,047 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 11:34:56,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:34:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 11:34:56,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-10-02 11:34:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:34:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2018-10-02 11:34:56,054 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 28 [2018-10-02 11:34:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:34:56,055 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2018-10-02 11:34:56,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:34:56,055 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2018-10-02 11:34:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 11:34:56,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:34:56,056 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-10-02 11:34:56,056 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:34:56,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:34:56,057 INFO L82 PathProgramCache]: Analyzing trace with hash -70825216, now seen corresponding path program 6 times [2018-10-02 11:34:56,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:34:56,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:34:56,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:56,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:34:56,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:56,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:34:56,286 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 [2018-10-02 11:34:56,295 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:34:56,396 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:34:56,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:34:56,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:34:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:56,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:34:56,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-10-02 11:34:56,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:34:56,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:34:56,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:34:56,785 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 16 states. [2018-10-02 11:34:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:34:56,881 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2018-10-02 11:34:56,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:34:56,882 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-10-02 11:34:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:34:56,883 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:34:56,883 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:34:56,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:34:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:34:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-02 11:34:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:34:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2018-10-02 11:34:56,890 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 33 [2018-10-02 11:34:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:34:56,891 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2018-10-02 11:34:56,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:34:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2018-10-02 11:34:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:34:56,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:34:56,892 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-10-02 11:34:56,893 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:34:56,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:34:56,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1872481585, now seen corresponding path program 7 times [2018-10-02 11:34:56,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:34:56,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:34:56,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:56,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:34:56,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:57,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:34:57,064 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 [2018-10-02 11:34:57,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:34:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:57,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:34:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:57,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:34:57,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-02 11:34:57,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:34:57,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:34:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:34:57,402 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 18 states. [2018-10-02 11:34:57,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:34:57,502 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2018-10-02 11:34:57,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:34:57,502 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2018-10-02 11:34:57,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:34:57,504 INFO L225 Difference]: With dead ends: 50 [2018-10-02 11:34:57,504 INFO L226 Difference]: Without dead ends: 48 [2018-10-02 11:34:57,505 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 [2018-10-02 11:34:57,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-02 11:34:57,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-10-02 11:34:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 11:34:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-10-02 11:34:57,515 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 38 [2018-10-02 11:34:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:34:57,515 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-10-02 11:34:57,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:34:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-10-02 11:34:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 11:34:57,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:34:57,517 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-10-02 11:34:57,517 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:34:57,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:34:57,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1776681376, now seen corresponding path program 8 times [2018-10-02 11:34:57,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:34:57,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:34:57,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:57,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:34:57,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:57,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:34:57,740 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 [2018-10-02 11:34:57,751 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:34:57,769 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:34:57,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:34:57,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:34:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:58,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:34:58,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-02 11:34:58,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:34:58,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:34:58,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:34:58,213 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 20 states. [2018-10-02 11:34:58,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:34:58,306 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2018-10-02 11:34:58,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:34:58,307 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2018-10-02 11:34:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:34:58,308 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:34:58,308 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:34:58,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:34:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:34:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-10-02 11:34:58,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 11:34:58,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2018-10-02 11:34:58,315 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 43 [2018-10-02 11:34:58,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:34:58,316 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2018-10-02 11:34:58,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:34:58,316 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2018-10-02 11:34:58,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 11:34:58,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:34:58,318 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-10-02 11:34:58,318 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:34:58,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:34:58,318 INFO L82 PathProgramCache]: Analyzing trace with hash -951698799, now seen corresponding path program 9 times [2018-10-02 11:34:58,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:34:58,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:34:58,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:58,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:34:58,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:34:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:34:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:58,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:34:58,524 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 [2018-10-02 11:34:58,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:34:58,565 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 11:34:58,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:34:58,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:34:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:34:59,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:34:59,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-02 11:34:59,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:34:59,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:34:59,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:34:59,599 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 22 states. [2018-10-02 11:35:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:00,055 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2018-10-02 11:35:00,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:35:00,056 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2018-10-02 11:35:00,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:00,056 INFO L225 Difference]: With dead ends: 60 [2018-10-02 11:35:00,057 INFO L226 Difference]: Without dead ends: 58 [2018-10-02 11:35:00,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:35:00,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-02 11:35:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-10-02 11:35:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 11:35:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2018-10-02 11:35:00,063 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 48 [2018-10-02 11:35:00,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:00,063 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2018-10-02 11:35:00,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:35:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2018-10-02 11:35:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 11:35:00,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:00,065 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-10-02 11:35:00,065 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:00,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:00,067 INFO L82 PathProgramCache]: Analyzing trace with hash -259461056, now seen corresponding path program 10 times [2018-10-02 11:35:00,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:00,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:00,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:00,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:00,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:00,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:00,420 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 [2018-10-02 11:35:00,428 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:35:00,444 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:35:00,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:00,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:01,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:01,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-10-02 11:35:01,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:35:01,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:35:01,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:35:01,321 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 24 states. [2018-10-02 11:35:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:01,570 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2018-10-02 11:35:01,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:35:01,570 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2018-10-02 11:35:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:01,572 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:35:01,572 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:35:01,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:35:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:35:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-02 11:35:01,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:35:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2018-10-02 11:35:01,579 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 53 [2018-10-02 11:35:01,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:01,579 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2018-10-02 11:35:01,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:35:01,579 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2018-10-02 11:35:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:35:01,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:01,580 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-10-02 11:35:01,581 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:01,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1213165553, now seen corresponding path program 11 times [2018-10-02 11:35:01,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:01,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:01,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:01,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:01,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:02,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:02,032 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 [2018-10-02 11:35:02,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:35:02,075 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 11:35:02,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:02,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:02,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:02,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-10-02 11:35:02,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:35:02,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:35:02,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:35:02,563 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand 26 states. [2018-10-02 11:35:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:02,674 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2018-10-02 11:35:02,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:35:02,674 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2018-10-02 11:35:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:02,675 INFO L225 Difference]: With dead ends: 70 [2018-10-02 11:35:02,676 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 11:35:02,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:35:02,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 11:35:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-10-02 11:35:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-02 11:35:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2018-10-02 11:35:02,683 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 58 [2018-10-02 11:35:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:02,683 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2018-10-02 11:35:02,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:35:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2018-10-02 11:35:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-02 11:35:02,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:02,685 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-10-02 11:35:02,685 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:02,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:02,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1043720480, now seen corresponding path program 12 times [2018-10-02 11:35:02,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:02,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:02,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:02,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:02,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:03,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:03,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:35:03,102 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:35:03,155 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:35:03,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:03,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:03,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:03,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-10-02 11:35:03,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:35:03,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:35:03,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:35:03,789 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 28 states. [2018-10-02 11:35:03,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:03,965 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2018-10-02 11:35:03,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:35:03,965 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2018-10-02 11:35:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:03,966 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:35:03,967 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 11:35:03,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:35:03,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 11:35:03,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-10-02 11:35:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 11:35:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2018-10-02 11:35:03,975 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 63 [2018-10-02 11:35:03,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:03,976 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2018-10-02 11:35:03,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:35:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2018-10-02 11:35:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 11:35:03,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:03,977 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-10-02 11:35:03,978 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:03,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:03,978 INFO L82 PathProgramCache]: Analyzing trace with hash 14511441, now seen corresponding path program 13 times [2018-10-02 11:35:03,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:03,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:03,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:03,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:03,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:04,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:04,201 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 [2018-10-02 11:35:04,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:04,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:04,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:04,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-10-02 11:35:04,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:35:04,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:35:04,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:35:04,643 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand 30 states. [2018-10-02 11:35:04,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:04,753 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2018-10-02 11:35:04,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:35:04,754 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2018-10-02 11:35:04,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:04,755 INFO L225 Difference]: With dead ends: 80 [2018-10-02 11:35:04,755 INFO L226 Difference]: Without dead ends: 78 [2018-10-02 11:35:04,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:35:04,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-02 11:35:04,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-10-02 11:35:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-02 11:35:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2018-10-02 11:35:04,761 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 68 [2018-10-02 11:35:04,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:04,762 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2018-10-02 11:35:04,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:35:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2018-10-02 11:35:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-02 11:35:04,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:04,763 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-10-02 11:35:04,763 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:04,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:04,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1220315776, now seen corresponding path program 14 times [2018-10-02 11:35:04,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:04,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:04,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:04,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:04,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:04,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:04,978 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 [2018-10-02 11:35:04,986 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:35:05,032 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:35:05,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:05,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:05,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:05,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-10-02 11:35:05,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:35:05,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:35:05,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:35:05,573 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand 32 states. [2018-10-02 11:35:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:05,706 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2018-10-02 11:35:05,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:35:05,707 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2018-10-02 11:35:05,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:05,708 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:35:05,708 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:35:05,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:35:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:35:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-02 11:35:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:35:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2018-10-02 11:35:05,715 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 73 [2018-10-02 11:35:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:05,715 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2018-10-02 11:35:05,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:35:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2018-10-02 11:35:05,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:35:05,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:05,717 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-10-02 11:35:05,717 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:05,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:05,717 INFO L82 PathProgramCache]: Analyzing trace with hash 127283889, now seen corresponding path program 15 times [2018-10-02 11:35:05,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:05,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:05,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:05,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:05,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:07,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:07,157 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 [2018-10-02 11:35:07,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:35:07,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 11:35:07,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:07,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:07,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:07,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-10-02 11:35:07,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:35:07,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:35:07,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:35:07,670 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 34 states. [2018-10-02 11:35:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:07,827 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2018-10-02 11:35:07,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:35:07,828 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-10-02 11:35:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:07,829 INFO L225 Difference]: With dead ends: 90 [2018-10-02 11:35:07,829 INFO L226 Difference]: Without dead ends: 88 [2018-10-02 11:35:07,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:35:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-02 11:35:07,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-10-02 11:35:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-02 11:35:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2018-10-02 11:35:07,835 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 78 [2018-10-02 11:35:07,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:07,835 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2018-10-02 11:35:07,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:35:07,835 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2018-10-02 11:35:07,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 11:35:07,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:07,836 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-10-02 11:35:07,837 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:07,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:07,837 INFO L82 PathProgramCache]: Analyzing trace with hash -233894880, now seen corresponding path program 16 times [2018-10-02 11:35:07,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:07,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:07,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:07,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:07,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:08,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:08,090 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 [2018-10-02 11:35:08,097 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:35:08,121 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:35:08,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:08,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:08,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:08,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-10-02 11:35:08,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:35:08,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:35:08,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:35:08,582 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand 36 states. [2018-10-02 11:35:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:08,718 INFO L93 Difference]: Finished difference Result 95 states and 131 transitions. [2018-10-02 11:35:08,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:35:08,718 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2018-10-02 11:35:08,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:08,719 INFO L225 Difference]: With dead ends: 95 [2018-10-02 11:35:08,719 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 11:35:08,720 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 [2018-10-02 11:35:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 11:35:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-10-02 11:35:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-02 11:35:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2018-10-02 11:35:08,725 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 83 [2018-10-02 11:35:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:08,726 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2018-10-02 11:35:08,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:35:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2018-10-02 11:35:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 11:35:08,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:08,727 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-10-02 11:35:08,727 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:08,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:08,728 INFO L82 PathProgramCache]: Analyzing trace with hash -610287599, now seen corresponding path program 17 times [2018-10-02 11:35:08,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:08,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:08,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:08,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:08,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:09,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:09,030 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 [2018-10-02 11:35:09,037 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:35:09,069 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 11:35:09,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:09,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:10,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:10,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-10-02 11:35:10,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:35:10,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:35:10,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:35:10,130 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand 38 states. [2018-10-02 11:35:10,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:10,299 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2018-10-02 11:35:10,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:35:10,299 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2018-10-02 11:35:10,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:10,301 INFO L225 Difference]: With dead ends: 100 [2018-10-02 11:35:10,301 INFO L226 Difference]: Without dead ends: 98 [2018-10-02 11:35:10,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:35:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-02 11:35:10,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-10-02 11:35:10,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 11:35:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 130 transitions. [2018-10-02 11:35:10,307 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 130 transitions. Word has length 88 [2018-10-02 11:35:10,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:10,307 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 130 transitions. [2018-10-02 11:35:10,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:35:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 130 transitions. [2018-10-02 11:35:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-02 11:35:10,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:10,309 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-10-02 11:35:10,309 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:10,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:10,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2059852480, now seen corresponding path program 18 times [2018-10-02 11:35:10,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:10,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:10,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:10,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:10,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:10,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:10,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:35:10,591 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:35:10,629 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:35:10,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:10,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:11,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:11,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-10-02 11:35:11,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:35:11,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:35:11,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:35:11,435 INFO L87 Difference]: Start difference. First operand 94 states and 130 transitions. Second operand 40 states. [2018-10-02 11:35:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:11,567 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2018-10-02 11:35:11,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:35:11,568 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 93 [2018-10-02 11:35:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:11,569 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:35:11,569 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:35:11,570 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 [2018-10-02 11:35:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:35:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-02 11:35:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 11:35:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2018-10-02 11:35:11,574 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 93 [2018-10-02 11:35:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:11,575 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2018-10-02 11:35:11,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:35:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2018-10-02 11:35:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:35:11,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:11,576 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-10-02 11:35:11,576 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:11,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:11,577 INFO L82 PathProgramCache]: Analyzing trace with hash -996141711, now seen corresponding path program 19 times [2018-10-02 11:35:11,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:11,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:11,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:11,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:11,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:12,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:12,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:35:12,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:12,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:13,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:13,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-10-02 11:35:13,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:35:13,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:35:13,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:35:13,919 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 42 states. [2018-10-02 11:35:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:14,055 INFO L93 Difference]: Finished difference Result 110 states and 152 transitions. [2018-10-02 11:35:14,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:35:14,056 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2018-10-02 11:35:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:14,057 INFO L225 Difference]: With dead ends: 110 [2018-10-02 11:35:14,057 INFO L226 Difference]: Without dead ends: 108 [2018-10-02 11:35:14,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:35:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-02 11:35:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-10-02 11:35:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-02 11:35:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2018-10-02 11:35:14,062 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 98 [2018-10-02 11:35:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:14,063 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2018-10-02 11:35:14,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:35:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2018-10-02 11:35:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-02 11:35:14,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:14,064 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-10-02 11:35:14,064 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:14,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:14,065 INFO L82 PathProgramCache]: Analyzing trace with hash -511385248, now seen corresponding path program 20 times [2018-10-02 11:35:14,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:14,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:14,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:14,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:14,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:14,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:14,576 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 [2018-10-02 11:35:14,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:35:14,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:35:14,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:14,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:16,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:16,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-10-02 11:35:16,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:35:16,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:35:16,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:35:16,501 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand 44 states. [2018-10-02 11:35:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:16,738 INFO L93 Difference]: Finished difference Result 115 states and 159 transitions. [2018-10-02 11:35:16,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:35:16,741 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 103 [2018-10-02 11:35:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:16,742 INFO L225 Difference]: With dead ends: 115 [2018-10-02 11:35:16,742 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 11:35:16,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:35:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 11:35:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-10-02 11:35:16,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 11:35:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 151 transitions. [2018-10-02 11:35:16,747 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 151 transitions. Word has length 103 [2018-10-02 11:35:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:16,747 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 151 transitions. [2018-10-02 11:35:16,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:35:16,748 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 151 transitions. [2018-10-02 11:35:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 11:35:16,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:16,748 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-10-02 11:35:16,748 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:16,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:16,749 INFO L82 PathProgramCache]: Analyzing trace with hash 851260113, now seen corresponding path program 21 times [2018-10-02 11:35:16,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:16,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:16,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:16,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:16,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:17,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:17,528 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 [2018-10-02 11:35:17,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:35:17,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 11:35:17,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:17,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:18,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:18,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-10-02 11:35:18,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:35:18,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:35:18,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:35:18,119 INFO L87 Difference]: Start difference. First operand 109 states and 151 transitions. Second operand 46 states. [2018-10-02 11:35:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:18,386 INFO L93 Difference]: Finished difference Result 120 states and 166 transitions. [2018-10-02 11:35:18,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:35:18,388 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 108 [2018-10-02 11:35:18,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:18,389 INFO L225 Difference]: With dead ends: 120 [2018-10-02 11:35:18,389 INFO L226 Difference]: Without dead ends: 118 [2018-10-02 11:35:18,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:35:18,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-02 11:35:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-10-02 11:35:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-02 11:35:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2018-10-02 11:35:18,396 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 158 transitions. Word has length 108 [2018-10-02 11:35:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:18,397 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 158 transitions. [2018-10-02 11:35:18,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:35:18,397 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 158 transitions. [2018-10-02 11:35:18,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-02 11:35:18,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:18,398 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-10-02 11:35:18,398 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:18,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:18,398 INFO L82 PathProgramCache]: Analyzing trace with hash -572317696, now seen corresponding path program 22 times [2018-10-02 11:35:18,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:18,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:18,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:18,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:18,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:18,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:18,864 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 [2018-10-02 11:35:18,873 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:35:18,912 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:35:18,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:18,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:19,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:19,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-10-02 11:35:19,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:35:19,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:35:19,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:35:19,559 INFO L87 Difference]: Start difference. First operand 114 states and 158 transitions. Second operand 48 states. [2018-10-02 11:35:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:19,731 INFO L93 Difference]: Finished difference Result 125 states and 173 transitions. [2018-10-02 11:35:19,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:35:19,732 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 113 [2018-10-02 11:35:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:19,733 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:35:19,733 INFO L226 Difference]: Without dead ends: 123 [2018-10-02 11:35:19,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:35:19,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-02 11:35:19,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-02 11:35:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 11:35:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 165 transitions. [2018-10-02 11:35:19,740 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 165 transitions. Word has length 113 [2018-10-02 11:35:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:19,740 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 165 transitions. [2018-10-02 11:35:19,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:35:19,740 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 165 transitions. [2018-10-02 11:35:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 11:35:19,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:19,741 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-10-02 11:35:19,741 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:19,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash 513611825, now seen corresponding path program 23 times [2018-10-02 11:35:19,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:19,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:19,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:19,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:19,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:20,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:20,430 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 [2018-10-02 11:35:20,437 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:35:20,484 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-02 11:35:20,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:20,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:21,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:21,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-10-02 11:35:21,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:35:21,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:35:21,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:35:21,125 INFO L87 Difference]: Start difference. First operand 119 states and 165 transitions. Second operand 50 states. [2018-10-02 11:35:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:21,320 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2018-10-02 11:35:21,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:35:21,320 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 118 [2018-10-02 11:35:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:21,322 INFO L225 Difference]: With dead ends: 130 [2018-10-02 11:35:21,322 INFO L226 Difference]: Without dead ends: 128 [2018-10-02 11:35:21,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:35:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-02 11:35:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-10-02 11:35:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-02 11:35:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2018-10-02 11:35:21,329 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 118 [2018-10-02 11:35:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:21,329 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2018-10-02 11:35:21,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:35:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2018-10-02 11:35:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-02 11:35:21,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:21,330 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-10-02 11:35:21,331 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:21,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:21,331 INFO L82 PathProgramCache]: Analyzing trace with hash -285501792, now seen corresponding path program 24 times [2018-10-02 11:35:21,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:21,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:21,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:21,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:21,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:21,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:21,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:35:21,815 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:35:21,861 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:35:21,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:21,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:22,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:22,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-10-02 11:35:22,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:35:22,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:35:22,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:35:22,764 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand 52 states. [2018-10-02 11:35:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:22,930 INFO L93 Difference]: Finished difference Result 135 states and 187 transitions. [2018-10-02 11:35:22,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:35:22,931 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 123 [2018-10-02 11:35:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:22,932 INFO L225 Difference]: With dead ends: 135 [2018-10-02 11:35:22,933 INFO L226 Difference]: Without dead ends: 133 [2018-10-02 11:35:22,934 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 [2018-10-02 11:35:22,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-02 11:35:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-10-02 11:35:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-02 11:35:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2018-10-02 11:35:22,940 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 123 [2018-10-02 11:35:22,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:22,940 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2018-10-02 11:35:22,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:35:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2018-10-02 11:35:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-02 11:35:22,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:22,941 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-10-02 11:35:22,942 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:22,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:22,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1768277393, now seen corresponding path program 25 times [2018-10-02 11:35:22,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:22,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:22,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:22,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:22,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:23,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:23,546 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 [2018-10-02 11:35:23,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:23,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:24,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:24,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-10-02 11:35:24,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:35:24,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:35:24,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:35:24,294 INFO L87 Difference]: Start difference. First operand 129 states and 179 transitions. Second operand 54 states. [2018-10-02 11:35:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:24,564 INFO L93 Difference]: Finished difference Result 140 states and 194 transitions. [2018-10-02 11:35:24,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:35:24,564 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 128 [2018-10-02 11:35:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:24,565 INFO L225 Difference]: With dead ends: 140 [2018-10-02 11:35:24,566 INFO L226 Difference]: Without dead ends: 138 [2018-10-02 11:35:24,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:35:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-02 11:35:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-10-02 11:35:24,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-02 11:35:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 186 transitions. [2018-10-02 11:35:24,572 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 186 transitions. Word has length 128 [2018-10-02 11:35:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:24,573 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 186 transitions. [2018-10-02 11:35:24,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:35:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 186 transitions. [2018-10-02 11:35:24,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-02 11:35:24,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:24,574 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-10-02 11:35:24,574 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:24,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:24,574 INFO L82 PathProgramCache]: Analyzing trace with hash -77052608, now seen corresponding path program 26 times [2018-10-02 11:35:24,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:24,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:24,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:24,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:24,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:25,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:25,080 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 [2018-10-02 11:35:25,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:35:25,122 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:35:25,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:25,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:26,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:26,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-10-02 11:35:26,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:35:26,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:35:26,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:35:26,069 INFO L87 Difference]: Start difference. First operand 134 states and 186 transitions. Second operand 56 states. [2018-10-02 11:35:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:26,262 INFO L93 Difference]: Finished difference Result 145 states and 201 transitions. [2018-10-02 11:35:26,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:35:26,262 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2018-10-02 11:35:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:26,263 INFO L225 Difference]: With dead ends: 145 [2018-10-02 11:35:26,263 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 11:35:26,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:35:26,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 11:35:26,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-02 11:35:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-02 11:35:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 193 transitions. [2018-10-02 11:35:26,270 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 193 transitions. Word has length 133 [2018-10-02 11:35:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:26,270 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 193 transitions. [2018-10-02 11:35:26,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:35:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 193 transitions. [2018-10-02 11:35:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-02 11:35:26,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:26,271 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-10-02 11:35:26,272 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:26,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:26,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1019034353, now seen corresponding path program 27 times [2018-10-02 11:35:26,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:26,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:26,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:26,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:26,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:27,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:27,601 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 [2018-10-02 11:35:27,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:35:27,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-02 11:35:27,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:27,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:28,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:28,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-10-02 11:35:28,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:35:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:35:28,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:35:28,880 INFO L87 Difference]: Start difference. First operand 139 states and 193 transitions. Second operand 58 states. [2018-10-02 11:35:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:29,067 INFO L93 Difference]: Finished difference Result 150 states and 208 transitions. [2018-10-02 11:35:29,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:35:29,067 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 138 [2018-10-02 11:35:29,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:29,068 INFO L225 Difference]: With dead ends: 150 [2018-10-02 11:35:29,069 INFO L226 Difference]: Without dead ends: 148 [2018-10-02 11:35:29,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:35:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-02 11:35:29,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-10-02 11:35:29,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-02 11:35:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 200 transitions. [2018-10-02 11:35:29,076 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 200 transitions. Word has length 138 [2018-10-02 11:35:29,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:29,076 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 200 transitions. [2018-10-02 11:35:29,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:35:29,076 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 200 transitions. [2018-10-02 11:35:29,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-02 11:35:29,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:29,077 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-10-02 11:35:29,077 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:29,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:29,078 INFO L82 PathProgramCache]: Analyzing trace with hash -247256096, now seen corresponding path program 28 times [2018-10-02 11:35:29,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:29,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:29,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:29,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:29,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:29,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:29,613 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 [2018-10-02 11:35:29,622 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:35:29,659 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:35:29,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:29,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:30,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:30,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-10-02 11:35:30,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:35:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:35:30,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:35:30,830 INFO L87 Difference]: Start difference. First operand 144 states and 200 transitions. Second operand 60 states. [2018-10-02 11:35:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:31,030 INFO L93 Difference]: Finished difference Result 155 states and 215 transitions. [2018-10-02 11:35:31,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:35:31,030 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 143 [2018-10-02 11:35:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:31,031 INFO L225 Difference]: With dead ends: 155 [2018-10-02 11:35:31,031 INFO L226 Difference]: Without dead ends: 153 [2018-10-02 11:35:31,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:35:31,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-02 11:35:31,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-10-02 11:35:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-02 11:35:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2018-10-02 11:35:31,038 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 143 [2018-10-02 11:35:31,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:31,039 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2018-10-02 11:35:31,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:35:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2018-10-02 11:35:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-02 11:35:31,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:31,040 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-10-02 11:35:31,040 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:31,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1791588433, now seen corresponding path program 29 times [2018-10-02 11:35:31,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:31,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:31,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:31,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:31,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:32,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:32,007 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 [2018-10-02 11:35:32,014 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:35:32,075 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-02 11:35:32,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:32,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:33,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:33,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-10-02 11:35:33,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:35:33,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:35:33,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:35:33,160 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand 62 states. [2018-10-02 11:35:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:33,363 INFO L93 Difference]: Finished difference Result 160 states and 222 transitions. [2018-10-02 11:35:33,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:35:33,371 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 148 [2018-10-02 11:35:33,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:33,372 INFO L225 Difference]: With dead ends: 160 [2018-10-02 11:35:33,372 INFO L226 Difference]: Without dead ends: 158 [2018-10-02 11:35:33,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:35:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-02 11:35:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-10-02 11:35:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-02 11:35:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 214 transitions. [2018-10-02 11:35:33,379 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 214 transitions. Word has length 148 [2018-10-02 11:35:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:33,379 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 214 transitions. [2018-10-02 11:35:33,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:35:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 214 transitions. [2018-10-02 11:35:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-02 11:35:33,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:33,380 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-10-02 11:35:33,380 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:33,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:33,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1713785472, now seen corresponding path program 30 times [2018-10-02 11:35:33,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:33,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:33,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:33,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:33,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:34,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:34,015 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 [2018-10-02 11:35:34,022 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:35:34,106 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 11:35:34,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:34,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:35,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:35,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-10-02 11:35:35,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:35:35,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:35:35,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:35:35,075 INFO L87 Difference]: Start difference. First operand 154 states and 214 transitions. Second operand 64 states. [2018-10-02 11:35:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:35,604 INFO L93 Difference]: Finished difference Result 165 states and 229 transitions. [2018-10-02 11:35:35,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:35:35,605 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 153 [2018-10-02 11:35:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:35,606 INFO L225 Difference]: With dead ends: 165 [2018-10-02 11:35:35,606 INFO L226 Difference]: Without dead ends: 163 [2018-10-02 11:35:35,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:35:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-02 11:35:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-02 11:35:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-02 11:35:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 221 transitions. [2018-10-02 11:35:35,613 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 221 transitions. Word has length 153 [2018-10-02 11:35:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:35,614 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 221 transitions. [2018-10-02 11:35:35,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:35:35,614 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 221 transitions. [2018-10-02 11:35:35,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-02 11:35:35,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:35,615 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-10-02 11:35:35,616 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:35,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:35,616 INFO L82 PathProgramCache]: Analyzing trace with hash -835682895, now seen corresponding path program 31 times [2018-10-02 11:35:35,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:35,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:35,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:35,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:35,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:36,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:36,241 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 [2018-10-02 11:35:36,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:36,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:37,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:37,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-10-02 11:35:37,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:35:37,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:35:37,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:35:37,532 INFO L87 Difference]: Start difference. First operand 159 states and 221 transitions. Second operand 66 states. [2018-10-02 11:35:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:37,837 INFO L93 Difference]: Finished difference Result 170 states and 236 transitions. [2018-10-02 11:35:37,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:35:37,837 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 158 [2018-10-02 11:35:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:37,838 INFO L225 Difference]: With dead ends: 170 [2018-10-02 11:35:37,838 INFO L226 Difference]: Without dead ends: 168 [2018-10-02 11:35:37,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:35:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-02 11:35:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-10-02 11:35:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-02 11:35:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 228 transitions. [2018-10-02 11:35:37,845 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 228 transitions. Word has length 158 [2018-10-02 11:35:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:37,845 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 228 transitions. [2018-10-02 11:35:37,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:35:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 228 transitions. [2018-10-02 11:35:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-02 11:35:37,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:37,846 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-10-02 11:35:37,846 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:37,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:37,847 INFO L82 PathProgramCache]: Analyzing trace with hash 925606176, now seen corresponding path program 32 times [2018-10-02 11:35:37,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:37,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:37,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:37,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:37,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:38,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:38,463 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 [2018-10-02 11:35:38,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:35:38,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:35:38,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:38,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:39,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:39,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-10-02 11:35:39,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:35:39,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:35:39,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:35:39,722 INFO L87 Difference]: Start difference. First operand 164 states and 228 transitions. Second operand 68 states. [2018-10-02 11:35:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:40,014 INFO L93 Difference]: Finished difference Result 175 states and 243 transitions. [2018-10-02 11:35:40,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:35:40,014 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 163 [2018-10-02 11:35:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:40,016 INFO L225 Difference]: With dead ends: 175 [2018-10-02 11:35:40,016 INFO L226 Difference]: Without dead ends: 173 [2018-10-02 11:35:40,017 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 [2018-10-02 11:35:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-02 11:35:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-10-02 11:35:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-02 11:35:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 235 transitions. [2018-10-02 11:35:40,023 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 235 transitions. Word has length 163 [2018-10-02 11:35:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:40,024 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 235 transitions. [2018-10-02 11:35:40,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:35:40,024 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 235 transitions. [2018-10-02 11:35:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-02 11:35:40,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:40,025 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-10-02 11:35:40,025 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:40,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:40,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1441248495, now seen corresponding path program 33 times [2018-10-02 11:35:40,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:40,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:40,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:40,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:40,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:42,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:42,431 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 [2018-10-02 11:35:42,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:35:42,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-02 11:35:42,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:42,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:43,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:43,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-10-02 11:35:43,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:35:43,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:35:43,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:35:43,783 INFO L87 Difference]: Start difference. First operand 169 states and 235 transitions. Second operand 70 states. [2018-10-02 11:35:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:44,241 INFO L93 Difference]: Finished difference Result 180 states and 250 transitions. [2018-10-02 11:35:44,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:35:44,241 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 168 [2018-10-02 11:35:44,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:44,243 INFO L225 Difference]: With dead ends: 180 [2018-10-02 11:35:44,243 INFO L226 Difference]: Without dead ends: 178 [2018-10-02 11:35:44,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:35:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-02 11:35:44,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-10-02 11:35:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-02 11:35:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 242 transitions. [2018-10-02 11:35:44,249 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 242 transitions. Word has length 168 [2018-10-02 11:35:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:44,250 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 242 transitions. [2018-10-02 11:35:44,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:35:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 242 transitions. [2018-10-02 11:35:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-02 11:35:44,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:44,251 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-10-02 11:35:44,251 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:44,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:44,251 INFO L82 PathProgramCache]: Analyzing trace with hash 686632896, now seen corresponding path program 34 times [2018-10-02 11:35:44,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:44,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:44,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:44,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:44,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:45,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:45,484 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 [2018-10-02 11:35:45,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:35:45,538 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:35:45,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:45,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:46,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:46,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-10-02 11:35:46,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:35:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:35:46,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:35:46,662 INFO L87 Difference]: Start difference. First operand 174 states and 242 transitions. Second operand 72 states. [2018-10-02 11:35:47,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:47,127 INFO L93 Difference]: Finished difference Result 185 states and 257 transitions. [2018-10-02 11:35:47,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:35:47,127 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 173 [2018-10-02 11:35:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:47,128 INFO L225 Difference]: With dead ends: 185 [2018-10-02 11:35:47,128 INFO L226 Difference]: Without dead ends: 183 [2018-10-02 11:35:47,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:35:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-02 11:35:47,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-10-02 11:35:47,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-02 11:35:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 249 transitions. [2018-10-02 11:35:47,135 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 249 transitions. Word has length 173 [2018-10-02 11:35:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:47,136 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 249 transitions. [2018-10-02 11:35:47,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:35:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 249 transitions. [2018-10-02 11:35:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-02 11:35:47,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:47,137 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-10-02 11:35:47,137 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:47,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash 170319985, now seen corresponding path program 35 times [2018-10-02 11:35:47,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:47,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:47,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:47,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:47,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:48,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:48,792 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 [2018-10-02 11:35:48,800 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:35:48,914 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-02 11:35:48,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:48,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:50,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:50,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-10-02 11:35:50,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:35:50,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:35:50,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:35:50,781 INFO L87 Difference]: Start difference. First operand 179 states and 249 transitions. Second operand 74 states. [2018-10-02 11:35:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:51,078 INFO L93 Difference]: Finished difference Result 190 states and 264 transitions. [2018-10-02 11:35:51,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:35:51,079 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 178 [2018-10-02 11:35:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:51,081 INFO L225 Difference]: With dead ends: 190 [2018-10-02 11:35:51,081 INFO L226 Difference]: Without dead ends: 188 [2018-10-02 11:35:51,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:35:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-10-02 11:35:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-10-02 11:35:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-02 11:35:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2018-10-02 11:35:51,087 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 178 [2018-10-02 11:35:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:51,088 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2018-10-02 11:35:51,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:35:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2018-10-02 11:35:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-02 11:35:51,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:51,089 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-10-02 11:35:51,089 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:51,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:51,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2021329312, now seen corresponding path program 36 times [2018-10-02 11:35:51,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:51,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:51,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:51,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:51,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:52,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:52,212 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 [2018-10-02 11:35:52,220 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:35:52,299 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 11:35:52,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:35:52,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:54,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:54,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-10-02 11:35:54,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 11:35:54,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 11:35:54,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:35:54,100 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand 76 states. [2018-10-02 11:35:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:54,445 INFO L93 Difference]: Finished difference Result 195 states and 271 transitions. [2018-10-02 11:35:54,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:35:54,445 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 183 [2018-10-02 11:35:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:54,447 INFO L225 Difference]: With dead ends: 195 [2018-10-02 11:35:54,447 INFO L226 Difference]: Without dead ends: 193 [2018-10-02 11:35:54,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:35:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-02 11:35:54,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-10-02 11:35:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-02 11:35:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 263 transitions. [2018-10-02 11:35:54,454 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 263 transitions. Word has length 183 [2018-10-02 11:35:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:54,454 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 263 transitions. [2018-10-02 11:35:54,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 11:35:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 263 transitions. [2018-10-02 11:35:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-02 11:35:54,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:54,456 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-10-02 11:35:54,456 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:54,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:54,457 INFO L82 PathProgramCache]: Analyzing trace with hash 578960849, now seen corresponding path program 37 times [2018-10-02 11:35:54,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:54,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:54,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:54,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:35:54,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:56,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:35:56,306 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 [2018-10-02 11:35:56,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:35:56,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:35:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:35:57,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:35:57,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-10-02 11:35:57,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:35:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:35:57,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:35:57,792 INFO L87 Difference]: Start difference. First operand 189 states and 263 transitions. Second operand 78 states. [2018-10-02 11:35:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:35:58,167 INFO L93 Difference]: Finished difference Result 200 states and 278 transitions. [2018-10-02 11:35:58,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:35:58,167 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 188 [2018-10-02 11:35:58,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:35:58,169 INFO L225 Difference]: With dead ends: 200 [2018-10-02 11:35:58,169 INFO L226 Difference]: Without dead ends: 198 [2018-10-02 11:35:58,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:35:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-02 11:35:58,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-10-02 11:35:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-02 11:35:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 270 transitions. [2018-10-02 11:35:58,176 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 270 transitions. Word has length 188 [2018-10-02 11:35:58,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:35:58,176 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 270 transitions. [2018-10-02 11:35:58,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:35:58,176 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 270 transitions. [2018-10-02 11:35:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-02 11:35:58,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:35:58,178 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-10-02 11:35:58,178 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:35:58,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:35:58,178 INFO L82 PathProgramCache]: Analyzing trace with hash -963840768, now seen corresponding path program 38 times [2018-10-02 11:35:58,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:35:58,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:35:58,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:58,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:35:58,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:35:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:00,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:00,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:36:00,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:36:00,945 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:36:00,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:00,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:02,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:02,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2018-10-02 11:36:02,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:36:02,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:36:02,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:36:02,249 INFO L87 Difference]: Start difference. First operand 194 states and 270 transitions. Second operand 80 states. [2018-10-02 11:36:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:02,611 INFO L93 Difference]: Finished difference Result 205 states and 285 transitions. [2018-10-02 11:36:02,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:36:02,612 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 193 [2018-10-02 11:36:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:02,613 INFO L225 Difference]: With dead ends: 205 [2018-10-02 11:36:02,613 INFO L226 Difference]: Without dead ends: 203 [2018-10-02 11:36:02,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:36:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-02 11:36:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-10-02 11:36:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-02 11:36:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 277 transitions. [2018-10-02 11:36:02,620 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 277 transitions. Word has length 193 [2018-10-02 11:36:02,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:02,621 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 277 transitions. [2018-10-02 11:36:02,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:36:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 277 transitions. [2018-10-02 11:36:02,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-02 11:36:02,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:02,622 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-10-02 11:36:02,622 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:02,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:02,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1345297615, now seen corresponding path program 39 times [2018-10-02 11:36:02,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:02,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:02,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:02,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:02,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:03,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:03,964 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 [2018-10-02 11:36:03,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:36:04,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-02 11:36:04,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:04,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:05,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:05,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-10-02 11:36:05,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 11:36:05,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 11:36:05,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:36:05,554 INFO L87 Difference]: Start difference. First operand 199 states and 277 transitions. Second operand 82 states. [2018-10-02 11:36:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:05,952 INFO L93 Difference]: Finished difference Result 210 states and 292 transitions. [2018-10-02 11:36:05,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:36:05,952 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 198 [2018-10-02 11:36:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:05,953 INFO L225 Difference]: With dead ends: 210 [2018-10-02 11:36:05,953 INFO L226 Difference]: Without dead ends: 208 [2018-10-02 11:36:05,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:36:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-02 11:36:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-10-02 11:36:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-10-02 11:36:05,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 284 transitions. [2018-10-02 11:36:05,959 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 284 transitions. Word has length 198 [2018-10-02 11:36:05,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:05,959 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 284 transitions. [2018-10-02 11:36:05,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 11:36:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 284 transitions. [2018-10-02 11:36:05,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-02 11:36:05,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:05,961 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-10-02 11:36:05,961 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:05,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:05,961 INFO L82 PathProgramCache]: Analyzing trace with hash 555690912, now seen corresponding path program 40 times [2018-10-02 11:36:05,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:05,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:05,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:05,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:05,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:07,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:07,029 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 [2018-10-02 11:36:07,036 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:36:07,088 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:36:07,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:07,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:08,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:08,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 83 [2018-10-02 11:36:08,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 11:36:08,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 11:36:08,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:36:08,759 INFO L87 Difference]: Start difference. First operand 204 states and 284 transitions. Second operand 84 states. [2018-10-02 11:36:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:09,132 INFO L93 Difference]: Finished difference Result 215 states and 299 transitions. [2018-10-02 11:36:09,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:36:09,133 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 203 [2018-10-02 11:36:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:09,134 INFO L225 Difference]: With dead ends: 215 [2018-10-02 11:36:09,134 INFO L226 Difference]: Without dead ends: 213 [2018-10-02 11:36:09,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:36:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-02 11:36:09,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-10-02 11:36:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-02 11:36:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 291 transitions. [2018-10-02 11:36:09,140 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 291 transitions. Word has length 203 [2018-10-02 11:36:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:09,140 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 291 transitions. [2018-10-02 11:36:09,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 11:36:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 291 transitions. [2018-10-02 11:36:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-02 11:36:09,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:09,141 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-10-02 11:36:09,142 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:09,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:09,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1463242897, now seen corresponding path program 41 times [2018-10-02 11:36:09,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:09,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:09,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:09,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:09,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:10,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:10,149 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 [2018-10-02 11:36:10,155 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:36:10,251 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-02 11:36:10,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:10,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:14,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:14,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-10-02 11:36:14,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 11:36:14,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 11:36:14,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:36:14,353 INFO L87 Difference]: Start difference. First operand 209 states and 291 transitions. Second operand 86 states. [2018-10-02 11:36:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:14,736 INFO L93 Difference]: Finished difference Result 220 states and 306 transitions. [2018-10-02 11:36:14,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:36:14,737 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 208 [2018-10-02 11:36:14,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:14,738 INFO L225 Difference]: With dead ends: 220 [2018-10-02 11:36:14,738 INFO L226 Difference]: Without dead ends: 218 [2018-10-02 11:36:14,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:36:14,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-02 11:36:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-10-02 11:36:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-02 11:36:14,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 298 transitions. [2018-10-02 11:36:14,744 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 298 transitions. Word has length 208 [2018-10-02 11:36:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:14,744 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 298 transitions. [2018-10-02 11:36:14,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 11:36:14,744 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 298 transitions. [2018-10-02 11:36:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-02 11:36:14,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:14,745 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-10-02 11:36:14,745 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:14,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:14,746 INFO L82 PathProgramCache]: Analyzing trace with hash 970299968, now seen corresponding path program 42 times [2018-10-02 11:36:14,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:14,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:14,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:14,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:14,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:16,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:16,060 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 [2018-10-02 11:36:16,067 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:36:16,160 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 11:36:16,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:16,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:17,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:17,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 87 [2018-10-02 11:36:17,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 11:36:17,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 11:36:17,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:36:17,898 INFO L87 Difference]: Start difference. First operand 214 states and 298 transitions. Second operand 88 states. [2018-10-02 11:36:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:18,315 INFO L93 Difference]: Finished difference Result 225 states and 313 transitions. [2018-10-02 11:36:18,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:36:18,315 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 213 [2018-10-02 11:36:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:18,316 INFO L225 Difference]: With dead ends: 225 [2018-10-02 11:36:18,317 INFO L226 Difference]: Without dead ends: 223 [2018-10-02 11:36:18,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:36:18,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-02 11:36:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-10-02 11:36:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-02 11:36:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 305 transitions. [2018-10-02 11:36:18,323 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 305 transitions. Word has length 213 [2018-10-02 11:36:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:18,323 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 305 transitions. [2018-10-02 11:36:18,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 11:36:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 305 transitions. [2018-10-02 11:36:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-02 11:36:18,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:18,324 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-10-02 11:36:18,324 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:18,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:18,324 INFO L82 PathProgramCache]: Analyzing trace with hash 106759665, now seen corresponding path program 43 times [2018-10-02 11:36:18,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:18,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:18,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:18,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:18,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:19,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:19,502 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 [2018-10-02 11:36:19,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:19,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:21,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:21,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 89 [2018-10-02 11:36:21,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 11:36:21,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 11:36:21,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:36:21,200 INFO L87 Difference]: Start difference. First operand 219 states and 305 transitions. Second operand 90 states. [2018-10-02 11:36:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:21,655 INFO L93 Difference]: Finished difference Result 230 states and 320 transitions. [2018-10-02 11:36:21,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:36:21,655 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 218 [2018-10-02 11:36:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:21,656 INFO L225 Difference]: With dead ends: 230 [2018-10-02 11:36:21,656 INFO L226 Difference]: Without dead ends: 228 [2018-10-02 11:36:21,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:36:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-02 11:36:21,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-10-02 11:36:21,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-02 11:36:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 312 transitions. [2018-10-02 11:36:21,662 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 312 transitions. Word has length 218 [2018-10-02 11:36:21,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:21,662 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 312 transitions. [2018-10-02 11:36:21,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 11:36:21,662 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 312 transitions. [2018-10-02 11:36:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-02 11:36:21,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:21,663 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-10-02 11:36:21,663 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:21,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:21,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1161150240, now seen corresponding path program 44 times [2018-10-02 11:36:21,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:21,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:21,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:21,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:21,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:22,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:22,622 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 [2018-10-02 11:36:22,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:36:22,685 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:36:22,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:22,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:24,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:24,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 91 [2018-10-02 11:36:24,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 11:36:24,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 11:36:24,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:36:24,618 INFO L87 Difference]: Start difference. First operand 224 states and 312 transitions. Second operand 92 states. [2018-10-02 11:36:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:25,055 INFO L93 Difference]: Finished difference Result 235 states and 327 transitions. [2018-10-02 11:36:25,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:36:25,056 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 223 [2018-10-02 11:36:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:25,057 INFO L225 Difference]: With dead ends: 235 [2018-10-02 11:36:25,057 INFO L226 Difference]: Without dead ends: 233 [2018-10-02 11:36:25,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:36:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-02 11:36:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-10-02 11:36:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-02 11:36:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 319 transitions. [2018-10-02 11:36:25,065 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 319 transitions. Word has length 223 [2018-10-02 11:36:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:25,066 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 319 transitions. [2018-10-02 11:36:25,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 11:36:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 319 transitions. [2018-10-02 11:36:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-02 11:36:25,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:25,067 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-10-02 11:36:25,068 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:25,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1399292753, now seen corresponding path program 45 times [2018-10-02 11:36:25,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:25,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:25,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:25,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:25,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:26,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:26,114 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 [2018-10-02 11:36:26,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:36:26,222 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-02 11:36:26,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:26,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:27,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:27,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2018-10-02 11:36:27,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 11:36:27,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 11:36:27,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:36:27,980 INFO L87 Difference]: Start difference. First operand 229 states and 319 transitions. Second operand 94 states. [2018-10-02 11:36:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:28,447 INFO L93 Difference]: Finished difference Result 240 states and 334 transitions. [2018-10-02 11:36:28,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:36:28,447 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 228 [2018-10-02 11:36:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:28,448 INFO L225 Difference]: With dead ends: 240 [2018-10-02 11:36:28,448 INFO L226 Difference]: Without dead ends: 238 [2018-10-02 11:36:28,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:36:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-10-02 11:36:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-10-02 11:36:28,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-10-02 11:36:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2018-10-02 11:36:28,455 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 228 [2018-10-02 11:36:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:28,456 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2018-10-02 11:36:28,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 11:36:28,456 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2018-10-02 11:36:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-02 11:36:28,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:28,457 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-10-02 11:36:28,458 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:28,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:28,458 INFO L82 PathProgramCache]: Analyzing trace with hash -174645376, now seen corresponding path program 46 times [2018-10-02 11:36:28,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:28,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:28,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:28,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:28,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:29,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:29,794 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 [2018-10-02 11:36:29,802 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:36:29,880 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:36:29,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:29,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:31,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:31,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2018-10-02 11:36:31,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 11:36:31,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 11:36:31,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:36:31,982 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand 96 states. [2018-10-02 11:36:32,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:32,572 INFO L93 Difference]: Finished difference Result 245 states and 341 transitions. [2018-10-02 11:36:32,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:36:32,572 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 233 [2018-10-02 11:36:32,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:32,574 INFO L225 Difference]: With dead ends: 245 [2018-10-02 11:36:32,574 INFO L226 Difference]: Without dead ends: 243 [2018-10-02 11:36:32,574 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 [2018-10-02 11:36:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-02 11:36:32,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-10-02 11:36:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-02 11:36:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 333 transitions. [2018-10-02 11:36:32,581 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 333 transitions. Word has length 233 [2018-10-02 11:36:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:32,582 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 333 transitions. [2018-10-02 11:36:32,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 11:36:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 333 transitions. [2018-10-02 11:36:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-02 11:36:32,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:32,583 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-10-02 11:36:32,584 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:32,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:32,584 INFO L82 PathProgramCache]: Analyzing trace with hash -587413327, now seen corresponding path program 47 times [2018-10-02 11:36:32,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:32,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:32,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:32,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:32,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:33,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:33,676 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 [2018-10-02 11:36:33,684 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:36:33,792 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-02 11:36:33,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:33,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:35,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:35,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2018-10-02 11:36:35,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 11:36:35,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 11:36:35,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:36:35,887 INFO L87 Difference]: Start difference. First operand 239 states and 333 transitions. Second operand 98 states. [2018-10-02 11:36:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:36,430 INFO L93 Difference]: Finished difference Result 250 states and 348 transitions. [2018-10-02 11:36:36,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:36:36,430 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 238 [2018-10-02 11:36:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:36,432 INFO L225 Difference]: With dead ends: 250 [2018-10-02 11:36:36,432 INFO L226 Difference]: Without dead ends: 248 [2018-10-02 11:36:36,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:36:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-02 11:36:36,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-10-02 11:36:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-02 11:36:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2018-10-02 11:36:36,440 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 238 [2018-10-02 11:36:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:36,440 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2018-10-02 11:36:36,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 11:36:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2018-10-02 11:36:36,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-02 11:36:36,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:36,442 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-10-02 11:36:36,442 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:36,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:36,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2091502048, now seen corresponding path program 48 times [2018-10-02 11:36:36,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:36,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:36,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:36,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:36,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:37,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:37,635 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 [2018-10-02 11:36:37,643 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:36:37,753 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 11:36:37,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:37,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:39,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:39,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 99 [2018-10-02 11:36:39,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-02 11:36:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-02 11:36:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:36:39,904 INFO L87 Difference]: Start difference. First operand 244 states and 340 transitions. Second operand 100 states. [2018-10-02 11:36:40,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:40,485 INFO L93 Difference]: Finished difference Result 255 states and 355 transitions. [2018-10-02 11:36:40,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:36:40,486 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 243 [2018-10-02 11:36:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:40,487 INFO L225 Difference]: With dead ends: 255 [2018-10-02 11:36:40,487 INFO L226 Difference]: Without dead ends: 253 [2018-10-02 11:36:40,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:36:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-10-02 11:36:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-10-02 11:36:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-10-02 11:36:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 347 transitions. [2018-10-02 11:36:40,493 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 347 transitions. Word has length 243 [2018-10-02 11:36:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:40,493 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 347 transitions. [2018-10-02 11:36:40,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-02 11:36:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 347 transitions. [2018-10-02 11:36:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-02 11:36:40,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:40,495 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-10-02 11:36:40,495 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:40,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:40,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1438460399, now seen corresponding path program 49 times [2018-10-02 11:36:40,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:40,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:40,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:40,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:40,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:41,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:41,695 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 [2018-10-02 11:36:41,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:41,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:43,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:43,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2018-10-02 11:36:43,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-02 11:36:43,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-02 11:36:43,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:36:43,788 INFO L87 Difference]: Start difference. First operand 249 states and 347 transitions. Second operand 102 states. [2018-10-02 11:36:44,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:44,491 INFO L93 Difference]: Finished difference Result 260 states and 362 transitions. [2018-10-02 11:36:44,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:36:44,491 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 248 [2018-10-02 11:36:44,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:44,493 INFO L225 Difference]: With dead ends: 260 [2018-10-02 11:36:44,493 INFO L226 Difference]: Without dead ends: 258 [2018-10-02 11:36:44,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:36:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-02 11:36:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2018-10-02 11:36:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-10-02 11:36:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2018-10-02 11:36:44,501 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 248 [2018-10-02 11:36:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:44,501 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2018-10-02 11:36:44,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-02 11:36:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2018-10-02 11:36:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-02 11:36:44,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:44,503 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1] [2018-10-02 11:36:44,503 INFO L423 AbstractCegarLoop]: === Iteration 52 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:44,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:44,504 INFO L82 PathProgramCache]: Analyzing trace with hash -459176768, now seen corresponding path program 50 times [2018-10-02 11:36:44,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:44,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:44,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:44,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:36:44,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:45,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:45,929 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 [2018-10-02 11:36:45,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:36:45,999 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:36:46,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:46,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:48,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:48,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 103 [2018-10-02 11:36:48,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-02 11:36:48,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-02 11:36:48,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:36:48,090 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand 104 states. [2018-10-02 11:36:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:49,009 INFO L93 Difference]: Finished difference Result 265 states and 369 transitions. [2018-10-02 11:36:49,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:36:49,009 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 253 [2018-10-02 11:36:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:49,011 INFO L225 Difference]: With dead ends: 265 [2018-10-02 11:36:49,011 INFO L226 Difference]: Without dead ends: 263 [2018-10-02 11:36:49,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:36:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-02 11:36:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-10-02 11:36:49,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-02 11:36:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 361 transitions. [2018-10-02 11:36:49,019 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 361 transitions. Word has length 253 [2018-10-02 11:36:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:49,019 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 361 transitions. [2018-10-02 11:36:49,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-02 11:36:49,020 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 361 transitions. [2018-10-02 11:36:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-02 11:36:49,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:49,021 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1] [2018-10-02 11:36:49,021 INFO L423 AbstractCegarLoop]: === Iteration 53 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:49,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:49,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1965053071, now seen corresponding path program 51 times [2018-10-02 11:36:49,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:49,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:49,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:49,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:49,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:50,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:50,640 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 [2018-10-02 11:36:50,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:36:50,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-02 11:36:50,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:50,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:52,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:52,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2018-10-02 11:36:52,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-02 11:36:52,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-02 11:36:52,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:36:52,998 INFO L87 Difference]: Start difference. First operand 259 states and 361 transitions. Second operand 106 states. [2018-10-02 11:36:53,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:53,578 INFO L93 Difference]: Finished difference Result 270 states and 376 transitions. [2018-10-02 11:36:53,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:36:53,579 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 258 [2018-10-02 11:36:53,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:53,580 INFO L225 Difference]: With dead ends: 270 [2018-10-02 11:36:53,580 INFO L226 Difference]: Without dead ends: 268 [2018-10-02 11:36:53,581 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 [2018-10-02 11:36:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-10-02 11:36:53,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2018-10-02 11:36:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-10-02 11:36:53,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 368 transitions. [2018-10-02 11:36:53,587 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 368 transitions. Word has length 258 [2018-10-02 11:36:53,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:53,587 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 368 transitions. [2018-10-02 11:36:53,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-02 11:36:53,588 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 368 transitions. [2018-10-02 11:36:53,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-02 11:36:53,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:53,589 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1] [2018-10-02 11:36:53,589 INFO L423 AbstractCegarLoop]: === Iteration 54 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:53,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:53,590 INFO L82 PathProgramCache]: Analyzing trace with hash 563284832, now seen corresponding path program 52 times [2018-10-02 11:36:53,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:53,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:53,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:53,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:53,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:55,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:55,177 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 [2018-10-02 11:36:55,184 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:36:55,246 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:36:55,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:55,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:36:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:57,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:36:57,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 107 [2018-10-02 11:36:57,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-02 11:36:57,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-02 11:36:57,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:36:57,528 INFO L87 Difference]: Start difference. First operand 264 states and 368 transitions. Second operand 108 states. [2018-10-02 11:36:58,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:36:58,133 INFO L93 Difference]: Finished difference Result 275 states and 383 transitions. [2018-10-02 11:36:58,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:36:58,133 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 263 [2018-10-02 11:36:58,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:36:58,134 INFO L225 Difference]: With dead ends: 275 [2018-10-02 11:36:58,134 INFO L226 Difference]: Without dead ends: 273 [2018-10-02 11:36:58,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:36:58,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-10-02 11:36:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2018-10-02 11:36:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-02 11:36:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2018-10-02 11:36:58,140 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 263 [2018-10-02 11:36:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:36:58,140 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2018-10-02 11:36:58,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-02 11:36:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2018-10-02 11:36:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-02 11:36:58,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:36:58,141 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1] [2018-10-02 11:36:58,141 INFO L423 AbstractCegarLoop]: === Iteration 55 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:36:58,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:36:58,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1996048593, now seen corresponding path program 53 times [2018-10-02 11:36:58,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:36:58,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:36:58,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:58,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:36:58,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:36:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:36:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:36:59,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:36:59,769 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 [2018-10-02 11:36:59,777 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:36:59,892 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-02 11:36:59,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:36:59,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:02,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:02,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 109 [2018-10-02 11:37:02,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-02 11:37:02,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-02 11:37:02,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:37:02,254 INFO L87 Difference]: Start difference. First operand 269 states and 375 transitions. Second operand 110 states. [2018-10-02 11:37:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:02,887 INFO L93 Difference]: Finished difference Result 280 states and 390 transitions. [2018-10-02 11:37:02,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:37:02,887 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 268 [2018-10-02 11:37:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:02,888 INFO L225 Difference]: With dead ends: 280 [2018-10-02 11:37:02,889 INFO L226 Difference]: Without dead ends: 278 [2018-10-02 11:37:02,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:37:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-02 11:37:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2018-10-02 11:37:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-10-02 11:37:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 382 transitions. [2018-10-02 11:37:02,894 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 382 transitions. Word has length 268 [2018-10-02 11:37:02,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:02,895 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 382 transitions. [2018-10-02 11:37:02,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-02 11:37:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 382 transitions. [2018-10-02 11:37:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-10-02 11:37:02,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:02,896 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1] [2018-10-02 11:37:02,896 INFO L423 AbstractCegarLoop]: === Iteration 56 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:02,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:02,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1774504448, now seen corresponding path program 54 times [2018-10-02 11:37:02,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:02,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:02,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:02,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:02,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:04,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:04,302 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 [2018-10-02 11:37:04,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:37:04,442 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 11:37:04,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:04,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:07,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:07,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 111 [2018-10-02 11:37:07,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-02 11:37:07,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-02 11:37:07,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:37:07,027 INFO L87 Difference]: Start difference. First operand 274 states and 382 transitions. Second operand 112 states. [2018-10-02 11:37:07,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:07,741 INFO L93 Difference]: Finished difference Result 285 states and 397 transitions. [2018-10-02 11:37:07,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:37:07,742 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 273 [2018-10-02 11:37:07,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:07,743 INFO L225 Difference]: With dead ends: 285 [2018-10-02 11:37:07,743 INFO L226 Difference]: Without dead ends: 283 [2018-10-02 11:37:07,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:37:07,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-10-02 11:37:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-10-02 11:37:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-10-02 11:37:07,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 389 transitions. [2018-10-02 11:37:07,751 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 389 transitions. Word has length 273 [2018-10-02 11:37:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:07,751 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 389 transitions. [2018-10-02 11:37:07,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-02 11:37:07,752 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 389 transitions. [2018-10-02 11:37:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-02 11:37:07,753 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:07,753 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1] [2018-10-02 11:37:07,753 INFO L423 AbstractCegarLoop]: === Iteration 57 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:07,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:07,754 INFO L82 PathProgramCache]: Analyzing trace with hash -281694671, now seen corresponding path program 55 times [2018-10-02 11:37:07,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:07,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:07,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:07,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:07,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:09,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:09,206 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 [2018-10-02 11:37:09,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:37:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:09,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:12,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:12,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 113 [2018-10-02 11:37:12,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-02 11:37:12,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-02 11:37:12,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-02 11:37:12,065 INFO L87 Difference]: Start difference. First operand 279 states and 389 transitions. Second operand 114 states. [2018-10-02 11:37:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:12,825 INFO L93 Difference]: Finished difference Result 290 states and 404 transitions. [2018-10-02 11:37:12,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:37:12,826 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 278 [2018-10-02 11:37:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:12,827 INFO L225 Difference]: With dead ends: 290 [2018-10-02 11:37:12,827 INFO L226 Difference]: Without dead ends: 288 [2018-10-02 11:37:12,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-02 11:37:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-10-02 11:37:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2018-10-02 11:37:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-10-02 11:37:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 396 transitions. [2018-10-02 11:37:12,833 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 396 transitions. Word has length 278 [2018-10-02 11:37:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:12,833 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 396 transitions. [2018-10-02 11:37:12,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-02 11:37:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 396 transitions. [2018-10-02 11:37:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-10-02 11:37:12,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:12,834 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1] [2018-10-02 11:37:12,834 INFO L423 AbstractCegarLoop]: === Iteration 58 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:12,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:12,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1269776224, now seen corresponding path program 56 times [2018-10-02 11:37:12,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:12,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:12,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:12,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:37:12,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:14,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:14,578 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 [2018-10-02 11:37:14,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:37:14,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:37:14,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:14,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:17,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:17,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 115 [2018-10-02 11:37:17,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-02 11:37:17,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-02 11:37:17,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-02 11:37:17,478 INFO L87 Difference]: Start difference. First operand 284 states and 396 transitions. Second operand 116 states. [2018-10-02 11:37:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:18,181 INFO L93 Difference]: Finished difference Result 295 states and 411 transitions. [2018-10-02 11:37:18,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:37:18,181 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 283 [2018-10-02 11:37:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:18,183 INFO L225 Difference]: With dead ends: 295 [2018-10-02 11:37:18,183 INFO L226 Difference]: Without dead ends: 293 [2018-10-02 11:37:18,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-02 11:37:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-10-02 11:37:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2018-10-02 11:37:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-10-02 11:37:18,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 403 transitions. [2018-10-02 11:37:18,188 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 403 transitions. Word has length 283 [2018-10-02 11:37:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:18,189 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 403 transitions. [2018-10-02 11:37:18,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-02 11:37:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 403 transitions. [2018-10-02 11:37:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-10-02 11:37:18,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:18,190 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1] [2018-10-02 11:37:18,190 INFO L423 AbstractCegarLoop]: === Iteration 59 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:18,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:18,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1555749777, now seen corresponding path program 57 times [2018-10-02 11:37:18,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:18,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:18,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:18,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:18,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:20,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:20,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:37:20,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:37:20,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-02 11:37:20,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:20,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:23,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:23,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 117 [2018-10-02 11:37:23,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-02 11:37:23,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-02 11:37:23,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-02 11:37:23,125 INFO L87 Difference]: Start difference. First operand 289 states and 403 transitions. Second operand 118 states. [2018-10-02 11:37:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:23,911 INFO L93 Difference]: Finished difference Result 300 states and 418 transitions. [2018-10-02 11:37:23,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:37:23,912 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 288 [2018-10-02 11:37:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:23,913 INFO L225 Difference]: With dead ends: 300 [2018-10-02 11:37:23,913 INFO L226 Difference]: Without dead ends: 298 [2018-10-02 11:37:23,914 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 [2018-10-02 11:37:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-10-02 11:37:23,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2018-10-02 11:37:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-10-02 11:37:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 410 transitions. [2018-10-02 11:37:23,921 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 410 transitions. Word has length 288 [2018-10-02 11:37:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:23,922 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 410 transitions. [2018-10-02 11:37:23,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-02 11:37:23,922 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 410 transitions. [2018-10-02 11:37:23,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-02 11:37:23,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:23,923 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1] [2018-10-02 11:37:23,924 INFO L423 AbstractCegarLoop]: === Iteration 60 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:23,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:23,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1607528256, now seen corresponding path program 58 times [2018-10-02 11:37:23,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:23,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:23,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:23,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:23,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:25,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:25,990 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 [2018-10-02 11:37:25,999 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:37:26,073 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:37:26,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:26,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:28,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:28,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 119 [2018-10-02 11:37:28,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-02 11:37:28,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-02 11:37:28,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-02 11:37:28,894 INFO L87 Difference]: Start difference. First operand 294 states and 410 transitions. Second operand 120 states. [2018-10-02 11:37:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:29,673 INFO L93 Difference]: Finished difference Result 305 states and 425 transitions. [2018-10-02 11:37:29,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:37:29,673 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 293 [2018-10-02 11:37:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:29,675 INFO L225 Difference]: With dead ends: 305 [2018-10-02 11:37:29,675 INFO L226 Difference]: Without dead ends: 303 [2018-10-02 11:37:29,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-02 11:37:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-02 11:37:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2018-10-02 11:37:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-02 11:37:29,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 417 transitions. [2018-10-02 11:37:29,682 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 417 transitions. Word has length 293 [2018-10-02 11:37:29,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:29,682 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 417 transitions. [2018-10-02 11:37:29,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-02 11:37:29,682 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 417 transitions. [2018-10-02 11:37:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-02 11:37:29,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:29,683 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1] [2018-10-02 11:37:29,683 INFO L423 AbstractCegarLoop]: === Iteration 61 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:29,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:29,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1898893553, now seen corresponding path program 59 times [2018-10-02 11:37:29,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:29,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:29,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:29,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:29,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:31,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:31,682 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 [2018-10-02 11:37:31,691 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:37:31,834 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-02 11:37:31,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:31,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:34,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:34,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 121 [2018-10-02 11:37:34,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-02 11:37:34,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-02 11:37:34,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-02 11:37:34,649 INFO L87 Difference]: Start difference. First operand 299 states and 417 transitions. Second operand 122 states. [2018-10-02 11:37:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:35,542 INFO L93 Difference]: Finished difference Result 310 states and 432 transitions. [2018-10-02 11:37:35,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:37:35,542 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 298 [2018-10-02 11:37:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:35,543 INFO L225 Difference]: With dead ends: 310 [2018-10-02 11:37:35,543 INFO L226 Difference]: Without dead ends: 308 [2018-10-02 11:37:35,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-02 11:37:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-10-02 11:37:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2018-10-02 11:37:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-02 11:37:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 424 transitions. [2018-10-02 11:37:35,550 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 424 transitions. Word has length 298 [2018-10-02 11:37:35,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:35,550 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 424 transitions. [2018-10-02 11:37:35,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-02 11:37:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 424 transitions. [2018-10-02 11:37:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-02 11:37:35,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:35,552 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1] [2018-10-02 11:37:35,552 INFO L423 AbstractCegarLoop]: === Iteration 62 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:35,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:35,552 INFO L82 PathProgramCache]: Analyzing trace with hash -765504032, now seen corresponding path program 60 times [2018-10-02 11:37:35,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:35,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:35,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:35,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:35,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:37,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:37,309 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 [2018-10-02 11:37:37,317 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:37:37,463 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-02 11:37:37,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:37,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:40,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:40,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 123 [2018-10-02 11:37:40,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-02 11:37:40,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-02 11:37:40,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-02 11:37:40,407 INFO L87 Difference]: Start difference. First operand 304 states and 424 transitions. Second operand 124 states. [2018-10-02 11:37:41,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:41,315 INFO L93 Difference]: Finished difference Result 315 states and 439 transitions. [2018-10-02 11:37:41,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:37:41,315 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 303 [2018-10-02 11:37:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:41,317 INFO L225 Difference]: With dead ends: 315 [2018-10-02 11:37:41,317 INFO L226 Difference]: Without dead ends: 313 [2018-10-02 11:37:41,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-02 11:37:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-10-02 11:37:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2018-10-02 11:37:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-10-02 11:37:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 431 transitions. [2018-10-02 11:37:41,324 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 431 transitions. Word has length 303 [2018-10-02 11:37:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:41,324 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 431 transitions. [2018-10-02 11:37:41,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-02 11:37:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 431 transitions. [2018-10-02 11:37:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-10-02 11:37:41,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:41,326 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1] [2018-10-02 11:37:41,326 INFO L423 AbstractCegarLoop]: === Iteration 63 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:41,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:41,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2034790831, now seen corresponding path program 61 times [2018-10-02 11:37:41,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:41,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:41,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:41,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:41,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:43,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:43,094 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 [2018-10-02 11:37:43,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:37:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:43,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:46,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:46,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 125 [2018-10-02 11:37:46,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-02 11:37:46,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-02 11:37:46,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-02 11:37:46,374 INFO L87 Difference]: Start difference. First operand 309 states and 431 transitions. Second operand 126 states. [2018-10-02 11:37:47,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:47,301 INFO L93 Difference]: Finished difference Result 320 states and 446 transitions. [2018-10-02 11:37:47,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:37:47,301 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 308 [2018-10-02 11:37:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:47,302 INFO L225 Difference]: With dead ends: 320 [2018-10-02 11:37:47,302 INFO L226 Difference]: Without dead ends: 318 [2018-10-02 11:37:47,303 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 [2018-10-02 11:37:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-10-02 11:37:47,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2018-10-02 11:37:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-10-02 11:37:47,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 438 transitions. [2018-10-02 11:37:47,309 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 438 transitions. Word has length 308 [2018-10-02 11:37:47,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:47,310 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 438 transitions. [2018-10-02 11:37:47,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-02 11:37:47,310 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 438 transitions. [2018-10-02 11:37:47,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-02 11:37:47,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:47,312 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1] [2018-10-02 11:37:47,312 INFO L423 AbstractCegarLoop]: === Iteration 64 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:47,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:47,312 INFO L82 PathProgramCache]: Analyzing trace with hash 429257856, now seen corresponding path program 62 times [2018-10-02 11:37:47,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:47,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:47,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:47,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:37:47,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:49,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:49,120 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 [2018-10-02 11:37:49,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:37:49,201 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:37:49,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:49,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:52,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:52,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 127 [2018-10-02 11:37:52,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-02 11:37:52,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-02 11:37:52,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-02 11:37:52,521 INFO L87 Difference]: Start difference. First operand 314 states and 438 transitions. Second operand 128 states. [2018-10-02 11:37:53,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:53,490 INFO L93 Difference]: Finished difference Result 325 states and 453 transitions. [2018-10-02 11:37:53,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:37:53,490 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 313 [2018-10-02 11:37:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:53,492 INFO L225 Difference]: With dead ends: 325 [2018-10-02 11:37:53,492 INFO L226 Difference]: Without dead ends: 323 [2018-10-02 11:37:53,493 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 [2018-10-02 11:37:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-02 11:37:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2018-10-02 11:37:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-10-02 11:37:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2018-10-02 11:37:53,499 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 313 [2018-10-02 11:37:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:53,500 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2018-10-02 11:37:53,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-02 11:37:53,500 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2018-10-02 11:37:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-10-02 11:37:53,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:37:53,502 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1] [2018-10-02 11:37:53,502 INFO L423 AbstractCegarLoop]: === Iteration 65 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:37:53,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:37:53,502 INFO L82 PathProgramCache]: Analyzing trace with hash -322639, now seen corresponding path program 63 times [2018-10-02 11:37:53,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:37:53,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:37:53,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:53,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:37:53,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:37:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:37:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:55,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:37:55,377 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 [2018-10-02 11:37:55,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:37:55,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-02 11:37:55,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:37:55,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:37:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:37:58,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:37:58,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 129 [2018-10-02 11:37:58,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-02 11:37:58,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-02 11:37:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-02 11:37:58,999 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand 130 states. [2018-10-02 11:37:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:37:59,990 INFO L93 Difference]: Finished difference Result 330 states and 460 transitions. [2018-10-02 11:37:59,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:37:59,990 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 318 [2018-10-02 11:37:59,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:37:59,991 INFO L225 Difference]: With dead ends: 330 [2018-10-02 11:37:59,992 INFO L226 Difference]: Without dead ends: 328 [2018-10-02 11:37:59,992 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 [2018-10-02 11:37:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-10-02 11:37:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2018-10-02 11:37:59,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-10-02 11:37:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 452 transitions. [2018-10-02 11:37:59,998 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 452 transitions. Word has length 318 [2018-10-02 11:37:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:37:59,998 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 452 transitions. [2018-10-02 11:37:59,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-02 11:37:59,999 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 452 transitions. [2018-10-02 11:38:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-10-02 11:38:00,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:00,000 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1] [2018-10-02 11:38:00,000 INFO L423 AbstractCegarLoop]: === Iteration 66 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:00,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:00,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1970353376, now seen corresponding path program 64 times [2018-10-02 11:38:00,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:00,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:00,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:00,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:00,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:02,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:02,250 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 [2018-10-02 11:38:02,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:38:02,337 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:38:02,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:02,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:05,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:05,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 131 [2018-10-02 11:38:05,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-02 11:38:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-02 11:38:05,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-02 11:38:05,660 INFO L87 Difference]: Start difference. First operand 324 states and 452 transitions. Second operand 132 states. [2018-10-02 11:38:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:06,582 INFO L93 Difference]: Finished difference Result 335 states and 467 transitions. [2018-10-02 11:38:06,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:38:06,582 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 323 [2018-10-02 11:38:06,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:06,584 INFO L225 Difference]: With dead ends: 335 [2018-10-02 11:38:06,584 INFO L226 Difference]: Without dead ends: 333 [2018-10-02 11:38:06,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-02 11:38:06,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-10-02 11:38:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 329. [2018-10-02 11:38:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-10-02 11:38:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 459 transitions. [2018-10-02 11:38:06,590 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 459 transitions. Word has length 323 [2018-10-02 11:38:06,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:06,591 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 459 transitions. [2018-10-02 11:38:06,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-02 11:38:06,591 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 459 transitions. [2018-10-02 11:38:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-10-02 11:38:06,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:06,592 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1] [2018-10-02 11:38:06,593 INFO L423 AbstractCegarLoop]: === Iteration 67 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:06,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1474338543, now seen corresponding path program 65 times [2018-10-02 11:38:06,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:06,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:06,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:06,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:06,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:08,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:08,614 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) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:08,625 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:38:08,788 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-02 11:38:08,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:08,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:12,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:12,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-10-02 11:38:12,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-02 11:38:12,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-02 11:38:12,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-02 11:38:12,466 INFO L87 Difference]: Start difference. First operand 329 states and 459 transitions. Second operand 134 states. [2018-10-02 11:38:13,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:13,540 INFO L93 Difference]: Finished difference Result 340 states and 474 transitions. [2018-10-02 11:38:13,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:38:13,541 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 328 [2018-10-02 11:38:13,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:13,542 INFO L225 Difference]: With dead ends: 340 [2018-10-02 11:38:13,542 INFO L226 Difference]: Without dead ends: 338 [2018-10-02 11:38:13,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-02 11:38:13,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-02 11:38:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2018-10-02 11:38:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2018-10-02 11:38:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 466 transitions. [2018-10-02 11:38:13,550 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 466 transitions. Word has length 328 [2018-10-02 11:38:13,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:13,550 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 466 transitions. [2018-10-02 11:38:13,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-02 11:38:13,550 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 466 transitions. [2018-10-02 11:38:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-10-02 11:38:13,551 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:13,552 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1] [2018-10-02 11:38:13,552 INFO L423 AbstractCegarLoop]: === Iteration 68 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:13,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:13,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1642322368, now seen corresponding path program 66 times [2018-10-02 11:38:13,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:13,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:13,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:13,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:13,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:15,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:15,779 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 [2018-10-02 11:38:15,786 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:38:15,945 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-02 11:38:15,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:15,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:19,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:19,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 135 [2018-10-02 11:38:19,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-02 11:38:19,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-02 11:38:19,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-02 11:38:19,670 INFO L87 Difference]: Start difference. First operand 334 states and 466 transitions. Second operand 136 states. [2018-10-02 11:38:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:20,612 INFO L93 Difference]: Finished difference Result 345 states and 481 transitions. [2018-10-02 11:38:20,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:38:20,612 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 333 [2018-10-02 11:38:20,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:20,614 INFO L225 Difference]: With dead ends: 345 [2018-10-02 11:38:20,614 INFO L226 Difference]: Without dead ends: 343 [2018-10-02 11:38:20,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-02 11:38:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-10-02 11:38:20,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2018-10-02 11:38:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-10-02 11:38:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 473 transitions. [2018-10-02 11:38:20,623 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 473 transitions. Word has length 333 [2018-10-02 11:38:20,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:20,623 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 473 transitions. [2018-10-02 11:38:20,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-02 11:38:20,624 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 473 transitions. [2018-10-02 11:38:20,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-02 11:38:20,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:20,625 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1] [2018-10-02 11:38:20,626 INFO L423 AbstractCegarLoop]: === Iteration 69 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:20,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:20,626 INFO L82 PathProgramCache]: Analyzing trace with hash 315258481, now seen corresponding path program 67 times [2018-10-02 11:38:20,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:20,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:20,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:20,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:20,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:23,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:23,053 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 [2018-10-02 11:38:23,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:38:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:23,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:26,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:26,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 137 [2018-10-02 11:38:26,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-02 11:38:26,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-02 11:38:26,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-02 11:38:26,686 INFO L87 Difference]: Start difference. First operand 339 states and 473 transitions. Second operand 138 states. [2018-10-02 11:38:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:27,771 INFO L93 Difference]: Finished difference Result 350 states and 488 transitions. [2018-10-02 11:38:27,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:38:27,772 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 338 [2018-10-02 11:38:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:27,773 INFO L225 Difference]: With dead ends: 350 [2018-10-02 11:38:27,773 INFO L226 Difference]: Without dead ends: 348 [2018-10-02 11:38:27,774 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 [2018-10-02 11:38:27,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-10-02 11:38:27,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2018-10-02 11:38:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-10-02 11:38:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 480 transitions. [2018-10-02 11:38:27,780 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 480 transitions. Word has length 338 [2018-10-02 11:38:27,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:27,780 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 480 transitions. [2018-10-02 11:38:27,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-02 11:38:27,780 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 480 transitions. [2018-10-02 11:38:27,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-10-02 11:38:27,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:27,782 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 1, 1, 1] [2018-10-02 11:38:27,782 INFO L423 AbstractCegarLoop]: === Iteration 70 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:27,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:27,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1672421472, now seen corresponding path program 68 times [2018-10-02 11:38:27,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:27,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:27,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:27,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:38:27,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:29,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:29,977 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 [2018-10-02 11:38:29,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:38:30,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:38:30,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:30,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:33,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:33,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 139 [2018-10-02 11:38:33,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-02 11:38:33,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-02 11:38:33,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-02 11:38:33,969 INFO L87 Difference]: Start difference. First operand 344 states and 480 transitions. Second operand 140 states. [2018-10-02 11:38:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:35,138 INFO L93 Difference]: Finished difference Result 355 states and 495 transitions. [2018-10-02 11:38:35,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:38:35,138 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 343 [2018-10-02 11:38:35,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:35,139 INFO L225 Difference]: With dead ends: 355 [2018-10-02 11:38:35,140 INFO L226 Difference]: Without dead ends: 353 [2018-10-02 11:38:35,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-02 11:38:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2018-10-02 11:38:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 349. [2018-10-02 11:38:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-10-02 11:38:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 487 transitions. [2018-10-02 11:38:35,146 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 487 transitions. Word has length 343 [2018-10-02 11:38:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:35,147 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 487 transitions. [2018-10-02 11:38:35,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-02 11:38:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 487 transitions. [2018-10-02 11:38:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-10-02 11:38:35,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:35,148 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 1, 1, 1] [2018-10-02 11:38:35,148 INFO L423 AbstractCegarLoop]: === Iteration 71 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:35,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:35,149 INFO L82 PathProgramCache]: Analyzing trace with hash -64859183, now seen corresponding path program 69 times [2018-10-02 11:38:35,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:35,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:35,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:35,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:35,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:37,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:37,804 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 [2018-10-02 11:38:37,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:38:37,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-02 11:38:37,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:37,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:38:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:41,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:38:41,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 141 [2018-10-02 11:38:41,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-02 11:38:41,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-02 11:38:41,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-02 11:38:41,780 INFO L87 Difference]: Start difference. First operand 349 states and 487 transitions. Second operand 142 states. [2018-10-02 11:38:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:38:42,967 INFO L93 Difference]: Finished difference Result 360 states and 502 transitions. [2018-10-02 11:38:42,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:38:42,968 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 348 [2018-10-02 11:38:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:38:42,969 INFO L225 Difference]: With dead ends: 360 [2018-10-02 11:38:42,969 INFO L226 Difference]: Without dead ends: 358 [2018-10-02 11:38:42,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-02 11:38:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-10-02 11:38:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2018-10-02 11:38:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-10-02 11:38:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 494 transitions. [2018-10-02 11:38:42,976 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 494 transitions. Word has length 348 [2018-10-02 11:38:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:38:42,977 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 494 transitions. [2018-10-02 11:38:42,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-02 11:38:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 494 transitions. [2018-10-02 11:38:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-10-02 11:38:42,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:38:42,978 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 1, 1, 1] [2018-10-02 11:38:42,978 INFO L423 AbstractCegarLoop]: === Iteration 72 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:38:42,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:38:42,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2072682240, now seen corresponding path program 70 times [2018-10-02 11:38:42,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:38:42,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:38:42,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:42,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:38:42,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:38:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:38:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:38:45,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:38:45,240 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 [2018-10-02 11:38:45,249 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:38:45,341 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:38:45,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:38:45,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-02 11:38:48,384 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-02 11:38:48,585 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:38:48,586 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:38:48,591 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:38:48,591 INFO L202 PluginConnector]: Adding new model RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:38:48 BoogieIcfgContainer [2018-10-02 11:38:48,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:38:48,592 INFO L168 Benchmark]: Toolchain (without parser) took 237199.08 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 64.0 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 41.3 MB). Peak memory consumption was 105.3 MB. Max. memory is 7.1 GB. [2018-10-02 11:38:48,594 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. [2018-10-02 11:38:48,594 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.15 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. [2018-10-02 11:38:48,595 INFO L168 Benchmark]: Boogie Preprocessor took 26.16 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. [2018-10-02 11:38:48,595 INFO L168 Benchmark]: RCFGBuilder took 406.95 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. [2018-10-02 11:38:48,595 INFO L168 Benchmark]: TraceAbstraction took 236713.77 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 64.0 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 20.2 MB). Peak memory consumption was 84.2 MB. Max. memory is 7.1 GB. [2018-10-02 11:38:48,598 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 44.15 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 26.16 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 406.95 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 236713.77 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 64.0 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 20.2 MB). Peak memory consumption was 84.2 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 354 with TraceHistMax 70, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 136 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 236.6s OverallTime, 72 OverallIterations, 70 TraceHistogramMax, 31.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 581 SDtfs, 28269 SDslu, 21030 SDs, 0 SdLazy, 9971 SolverSat, 196 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14770 GetRequests, 9800 SyntacticMatches, 0 SemanticMatches, 4970 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228620 ImplicationChecksByTransitivity, 168.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=354occurred in iteration=71, 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, 71 MinimizatonAttempts, 280 StatesRemovedByMinimization, 70 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 187.3s InterpolantComputationTime, 24574 NumberOfCodeBlocks, 24574 NumberOfCodeBlocksAsserted, 1376 NumberOfCheckSat, 24434 ConstructedInterpolants, 12144 QuantifiedInterpolants, 53865496 SizeOfPredicates, 2622 NumberOfNonLiveVariables, 22839 ConjunctsInSsa, 5106 ConjunctsInUnsatCore, 140 InterpolantComputations, 2 PerfectInterpolantSequences, 1/552231 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-0-2018-10-02_11-38-48-607.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/RailwayCrossing.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-38-48-607.csv Completed graceful shutdown