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-bd42740 [2018-09-23 21:17:17,931 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:17:17,933 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:17:17,950 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:17:17,951 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:17:17,952 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:17:17,954 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:17:17,956 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:17:17,958 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:17:17,960 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:17:17,962 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 21:17:18,010 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 [2018-09-23 21:17:18,036 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:17:18,037 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:17:18,041 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:17:18,041 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:17:18,042 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:17:18,042 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:17:18,043 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:17:18,043 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:17:18,043 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:17:18,043 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:17:18,044 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:17:18,044 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:17:18,044 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:17:18,044 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:17:18,046 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:17:18,046 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:17:18,046 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:17:18,046 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:17:18,047 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:17:18,047 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:17:18,047 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:17:18,047 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:17:18,049 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:17:18,049 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:17:18,049 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:17:18,049 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:17:18,050 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:17:18,050 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:17:18,050 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:17:18,050 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:17:18,120 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:17:18,136 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:17:18,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:17:18,144 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:17:18,144 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:17:18,145 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl [2018-09-23 21:17:18,146 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl' [2018-09-23 21:17:18,205 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:17:18,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:17:18,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:17:18,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:17:18,210 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:17:18,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:18" (1/1) ... [2018-09-23 21:17:18,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:18" (1/1) ... [2018-09-23 21:17:18,252 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 21:17:18,252 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 21:17:18,252 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 21:17:18,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:17:18,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:17:18,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:17:18,256 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:17:18,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:18" (1/1) ... [2018-09-23 21:17:18,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:18" (1/1) ... [2018-09-23 21:17:18,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:18" (1/1) ... [2018-09-23 21:17:18,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:18" (1/1) ... [2018-09-23 21:17:18,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:18" (1/1) ... [2018-09-23 21:17:18,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:18" (1/1) ... [2018-09-23 21:17:18,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:18" (1/1) ... [2018-09-23 21:17:18,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:17:18,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:17:18,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:17:18,281 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:17:18,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:18" (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 [2018-09-23 21:17:18,360 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-09-23 21:17:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-09-23 21:17:18,361 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-09-23 21:17:18,570 INFO L351 CfgBuilder]: Using library mode [2018-09-23 21:17:18,570 INFO L202 PluginConnector]: Adding new model RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:17:18 BoogieIcfgContainer [2018-09-23 21:17:18,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:17:18,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:17:18,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:17:18,575 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:17:18,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:17:18" (1/2) ... [2018-09-23 21:17:18,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ac633 and model type RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:17:18, skipping insertion in model container [2018-09-23 21:17:18,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:17:18" (2/2) ... [2018-09-23 21:17:18,579 INFO L112 eAbstractionObserver]: Analyzing ICFG RailwayCrossing.bpl [2018-09-23 21:17:18,589 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:17:18,598 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:17:18,658 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:17:18,659 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:17:18,660 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:17:18,660 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:17:18,660 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:17:18,660 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:17:18,660 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:17:18,661 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:17:18,661 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:17:18,682 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-23 21:17:18,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 21:17:18,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:18,699 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 21:17:18,700 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:18,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:18,710 INFO L82 PathProgramCache]: Analyzing trace with hash 30496, now seen corresponding path program 1 times [2018-09-23 21:17:18,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:18,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:18,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:18,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:18,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:18,881 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:17:18,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:17:18,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:17:18,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:17:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:17:18,906 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-23 21:17:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:19,016 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-23 21:17:19,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:17:19,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 21:17:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:19,038 INFO L225 Difference]: With dead ends: 19 [2018-09-23 21:17:19,039 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:17:19,046 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 [2018-09-23 21:17:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:17:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-09-23 21:17:19,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:17:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2018-09-23 21:17:19,118 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 3 [2018-09-23 21:17:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:19,119 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2018-09-23 21:17:19,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:17:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2018-09-23 21:17:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:17:19,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:19,119 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:17:19,120 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:19,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:19,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1863215691, now seen corresponding path program 1 times [2018-09-23 21:17:19,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:19,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:19,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:19,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:19,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:19,164 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:17:19,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:17:19,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:17:19,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:17:19,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:17:19,167 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand 3 states. [2018-09-23 21:17:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:19,192 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2018-09-23 21:17:19,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:17:19,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-23 21:17:19,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:19,194 INFO L225 Difference]: With dead ends: 16 [2018-09-23 21:17:19,194 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:17:19,195 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 [2018-09-23 21:17:19,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:17:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:17:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:17:19,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-09-23 21:17:19,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2018-09-23 21:17:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:19,199 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-09-23 21:17:19,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:17:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-09-23 21:17:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:17:19,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:19,200 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:17:19,200 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:19,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:19,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1926837521, now seen corresponding path program 1 times [2018-09-23 21:17:19,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:19,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:19,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:19,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:19,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:19,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:19,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:17:19,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:19,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:19,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:19,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2018-09-23 21:17:19,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:17:19,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:17:19,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:17:19,510 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 6 states. [2018-09-23 21:17:19,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:19,554 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-09-23 21:17:19,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:17:19,555 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-09-23 21:17:19,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:19,556 INFO L225 Difference]: With dead ends: 20 [2018-09-23 21:17:19,556 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 21:17:19,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:17:19,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 21:17:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-09-23 21:17:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:17:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-09-23 21:17:19,562 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-09-23 21:17:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:19,562 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-09-23 21:17:19,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:17:19,562 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-09-23 21:17:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:17:19,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:19,564 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-09-23 21:17:19,564 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:19,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:19,565 INFO L82 PathProgramCache]: Analyzing trace with hash 640583104, now seen corresponding path program 2 times [2018-09-23 21:17:19,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:19,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:19,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:19,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:19,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:19,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:19,664 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 [2018-09-23 21:17:19,679 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:17:19,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:17:19,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:19,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:20,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:20,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-09-23 21:17:20,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:17:20,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:17:20,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:17:20,048 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 8 states. [2018-09-23 21:17:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:20,077 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2018-09-23 21:17:20,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:17:20,079 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 21:17:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:20,080 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:17:20,080 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:17:20,081 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 [2018-09-23 21:17:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:17:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-23 21:17:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:17:20,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-09-23 21:17:20,086 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 13 [2018-09-23 21:17:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:20,089 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-09-23 21:17:20,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:17:20,089 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2018-09-23 21:17:20,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:17:20,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:20,090 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-09-23 21:17:20,090 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:20,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:20,091 INFO L82 PathProgramCache]: Analyzing trace with hash -297055631, now seen corresponding path program 3 times [2018-09-23 21:17:20,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:20,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:20,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:20,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:20,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:20,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:20,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:17:20,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:17:20,263 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 21:17:20,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:20,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:20,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:20,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-09-23 21:17:20,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:17:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:17:20,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:17:20,691 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 10 states. [2018-09-23 21:17:20,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:20,826 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2018-09-23 21:17:20,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:17:20,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-23 21:17:20,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:20,828 INFO L225 Difference]: With dead ends: 30 [2018-09-23 21:17:20,828 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 21:17:20,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:17:20,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 21:17:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-09-23 21:17:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 21:17:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2018-09-23 21:17:20,834 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 18 [2018-09-23 21:17:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:20,835 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2018-09-23 21:17:20,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:17:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2018-09-23 21:17:20,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 21:17:20,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:20,836 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-09-23 21:17:20,837 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:20,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2073218144, now seen corresponding path program 4 times [2018-09-23 21:17:20,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:20,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:20,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:20,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:20,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:20,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:20,983 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 [2018-09-23 21:17:20,991 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:17:21,005 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:17:21,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:21,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:21,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:21,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-23 21:17:21,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:17:21,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:17:21,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:17:21,305 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 12 states. [2018-09-23 21:17:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:21,398 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2018-09-23 21:17:21,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:17:21,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-09-23 21:17:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:21,400 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:17:21,401 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:17:21,402 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 [2018-09-23 21:17:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:17:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-09-23 21:17:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:17:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2018-09-23 21:17:21,408 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 23 [2018-09-23 21:17:21,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:21,408 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2018-09-23 21:17:21,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:17:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2018-09-23 21:17:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:17:21,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:21,410 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-09-23 21:17:21,410 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:21,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:21,411 INFO L82 PathProgramCache]: Analyzing trace with hash -609605679, now seen corresponding path program 5 times [2018-09-23 21:17:21,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:21,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:21,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:21,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:21,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:21,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:21,847 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 [2018-09-23 21:17:21,856 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:17:21,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 21:17:21,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:21,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:22,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:22,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 21:17:22,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:17:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:17:22,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:17:22,316 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 14 states. [2018-09-23 21:17:22,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:22,489 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2018-09-23 21:17:22,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:17:22,491 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2018-09-23 21:17:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:22,492 INFO L225 Difference]: With dead ends: 40 [2018-09-23 21:17:22,492 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 21:17:22,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:17:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 21:17:22,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-09-23 21:17:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 21:17:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2018-09-23 21:17:22,505 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 28 [2018-09-23 21:17:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:22,507 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2018-09-23 21:17:22,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:17:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2018-09-23 21:17:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:17:22,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:22,509 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-09-23 21:17:22,509 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:22,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:22,510 INFO L82 PathProgramCache]: Analyzing trace with hash -70825216, now seen corresponding path program 6 times [2018-09-23 21:17:22,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:22,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:22,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:22,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:22,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:22,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:22,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:17:22,801 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:17:22,906 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:17:22,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:22,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:23,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:23,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-23 21:17:23,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:17:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:17:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:17:23,283 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 16 states. [2018-09-23 21:17:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:23,371 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2018-09-23 21:17:23,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:17:23,371 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-23 21:17:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:23,373 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:17:23,373 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:17:23,373 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 [2018-09-23 21:17:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:17:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-23 21:17:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:17:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2018-09-23 21:17:23,381 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 33 [2018-09-23 21:17:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:23,381 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2018-09-23 21:17:23,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:17:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2018-09-23 21:17:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:17:23,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:23,383 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-09-23 21:17:23,383 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:23,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:23,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1872481585, now seen corresponding path program 7 times [2018-09-23 21:17:23,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:23,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:23,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:23,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:23,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:23,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:23,555 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 [2018-09-23 21:17:23,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:23,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:23,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:23,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-23 21:17:23,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:17:23,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:17:23,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:17:23,933 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 18 states. [2018-09-23 21:17:24,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:24,070 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2018-09-23 21:17:24,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:17:24,071 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2018-09-23 21:17:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:24,072 INFO L225 Difference]: With dead ends: 50 [2018-09-23 21:17:24,072 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 21:17:24,073 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 [2018-09-23 21:17:24,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 21:17:24,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-09-23 21:17:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 21:17:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-09-23 21:17:24,079 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 38 [2018-09-23 21:17:24,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:24,080 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-09-23 21:17:24,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:17:24,080 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-09-23 21:17:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 21:17:24,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:24,081 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-09-23 21:17:24,082 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:24,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:24,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1776681376, now seen corresponding path program 8 times [2018-09-23 21:17:24,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:24,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:24,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:24,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:24,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:24,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:24,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:17:24,336 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:17:24,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:17:24,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:24,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:24,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:24,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-23 21:17:24,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:17:24,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:17:24,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:17:24,773 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 20 states. [2018-09-23 21:17:24,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:24,900 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2018-09-23 21:17:24,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:17:24,900 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2018-09-23 21:17:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:24,901 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:17:24,901 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:17:24,902 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 [2018-09-23 21:17:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:17:24,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-09-23 21:17:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:17:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2018-09-23 21:17:24,910 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 43 [2018-09-23 21:17:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:24,910 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2018-09-23 21:17:24,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:17:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2018-09-23 21:17:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:17:24,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:24,912 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-09-23 21:17:24,912 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:24,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:24,912 INFO L82 PathProgramCache]: Analyzing trace with hash -951698799, now seen corresponding path program 9 times [2018-09-23 21:17:24,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:24,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:24,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:24,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:24,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:25,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:25,175 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 [2018-09-23 21:17:25,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:17:25,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 21:17:25,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:25,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:25,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:25,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-23 21:17:25,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:17:25,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:17:25,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:17:25,637 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 22 states. [2018-09-23 21:17:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:25,756 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2018-09-23 21:17:25,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:17:25,756 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2018-09-23 21:17:25,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:25,757 INFO L225 Difference]: With dead ends: 60 [2018-09-23 21:17:25,758 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 21:17:25,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:17:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 21:17:25,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-09-23 21:17:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 21:17:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2018-09-23 21:17:25,765 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 48 [2018-09-23 21:17:25,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:25,765 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2018-09-23 21:17:25,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:17:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2018-09-23 21:17:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:17:25,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:25,767 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-09-23 21:17:25,767 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:25,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:25,767 INFO L82 PathProgramCache]: Analyzing trace with hash -259461056, now seen corresponding path program 10 times [2018-09-23 21:17:25,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:25,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:25,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:25,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:25,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:26,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:26,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:17:26,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:17:26,114 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:17:26,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:26,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:26,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:26,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-09-23 21:17:26,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:17:26,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:17:26,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:17:26,404 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 24 states. [2018-09-23 21:17:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:26,616 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2018-09-23 21:17:26,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:17:26,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2018-09-23 21:17:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:26,618 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:17:26,618 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:17:26,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:17:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:17:26,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-23 21:17:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:17:26,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2018-09-23 21:17:26,625 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 53 [2018-09-23 21:17:26,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:26,625 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2018-09-23 21:17:26,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:17:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2018-09-23 21:17:26,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:17:26,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:26,626 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-09-23 21:17:26,626 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:26,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:26,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1213165553, now seen corresponding path program 11 times [2018-09-23 21:17:26,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:26,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:26,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:26,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:26,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:27,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:27,168 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 [2018-09-23 21:17:27,176 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:17:27,201 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 21:17:27,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:27,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:28,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:28,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-09-23 21:17:28,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:17:28,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:17:28,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:17:28,146 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand 26 states. [2018-09-23 21:17:28,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:28,259 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2018-09-23 21:17:28,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:17:28,260 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2018-09-23 21:17:28,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:28,260 INFO L225 Difference]: With dead ends: 70 [2018-09-23 21:17:28,260 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 21:17:28,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:17:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 21:17:28,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-09-23 21:17:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 21:17:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2018-09-23 21:17:28,268 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 58 [2018-09-23 21:17:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:28,268 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2018-09-23 21:17:28,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:17:28,269 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2018-09-23 21:17:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 21:17:28,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:28,270 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-09-23 21:17:28,270 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:28,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1043720480, now seen corresponding path program 12 times [2018-09-23 21:17:28,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:28,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:28,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:28,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:28,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:28,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:28,486 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 [2018-09-23 21:17:28,494 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:17:28,557 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:17:28,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:28,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:29,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:29,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-09-23 21:17:29,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:17:29,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:17:29,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:17:29,173 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 28 states. [2018-09-23 21:17:29,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:29,383 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2018-09-23 21:17:29,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:17:29,384 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2018-09-23 21:17:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:29,385 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:17:29,385 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 21:17:29,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:17:29,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 21:17:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-09-23 21:17:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 21:17:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2018-09-23 21:17:29,397 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 63 [2018-09-23 21:17:29,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:29,397 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2018-09-23 21:17:29,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:17:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2018-09-23 21:17:29,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:17:29,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:29,399 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-09-23 21:17:29,399 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:29,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:29,399 INFO L82 PathProgramCache]: Analyzing trace with hash 14511441, now seen corresponding path program 13 times [2018-09-23 21:17:29,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:29,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:29,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:29,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:29,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:29,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:29,838 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 [2018-09-23 21:17:29,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:29,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:30,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:30,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-09-23 21:17:30,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:17:30,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:17:30,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:17:30,393 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand 30 states. [2018-09-23 21:17:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:30,498 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2018-09-23 21:17:30,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:17:30,499 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2018-09-23 21:17:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:30,500 INFO L225 Difference]: With dead ends: 80 [2018-09-23 21:17:30,500 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 21:17:30,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:17:30,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 21:17:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-09-23 21:17:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 21:17:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2018-09-23 21:17:30,512 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 68 [2018-09-23 21:17:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:30,513 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2018-09-23 21:17:30,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:17:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2018-09-23 21:17:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 21:17:30,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:30,514 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-09-23 21:17:30,515 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:30,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:30,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1220315776, now seen corresponding path program 14 times [2018-09-23 21:17:30,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:30,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:30,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:30,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:30,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:30,778 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:30,778 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 [2018-09-23 21:17:30,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:17:30,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:17:30,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:30,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:31,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:31,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-09-23 21:17:31,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:17:31,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:17:31,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:17:31,382 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand 32 states. [2018-09-23 21:17:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:31,513 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2018-09-23 21:17:31,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:17:31,514 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2018-09-23 21:17:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:31,515 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:17:31,515 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:17:31,517 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 [2018-09-23 21:17:31,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:17:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-23 21:17:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 21:17:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2018-09-23 21:17:31,523 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 73 [2018-09-23 21:17:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:31,524 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2018-09-23 21:17:31,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:17:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2018-09-23 21:17:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:17:31,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:31,525 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-09-23 21:17:31,526 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:31,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:31,526 INFO L82 PathProgramCache]: Analyzing trace with hash 127283889, now seen corresponding path program 15 times [2018-09-23 21:17:31,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:31,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:31,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:31,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:31,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:32,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:32,479 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 [2018-09-23 21:17:32,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:17:32,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 21:17:32,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:32,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:32,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:32,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-09-23 21:17:32,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:17:32,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:17:32,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:17:32,940 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 34 states. [2018-09-23 21:17:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:33,097 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2018-09-23 21:17:33,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:17:33,098 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-09-23 21:17:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:33,099 INFO L225 Difference]: With dead ends: 90 [2018-09-23 21:17:33,099 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 21:17:33,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:17:33,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 21:17:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-09-23 21:17:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 21:17:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2018-09-23 21:17:33,105 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 78 [2018-09-23 21:17:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:33,106 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2018-09-23 21:17:33,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:17:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2018-09-23 21:17:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 21:17:33,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:33,107 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-09-23 21:17:33,107 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:33,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:33,108 INFO L82 PathProgramCache]: Analyzing trace with hash -233894880, now seen corresponding path program 16 times [2018-09-23 21:17:33,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:33,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:33,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:33,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:33,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:33,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:33,411 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 [2018-09-23 21:17:33,419 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:17:33,441 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:17:33,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:33,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:33,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:33,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-09-23 21:17:33,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:17:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:17:33,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:17:33,882 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand 36 states. [2018-09-23 21:17:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:34,072 INFO L93 Difference]: Finished difference Result 95 states and 131 transitions. [2018-09-23 21:17:34,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:17:34,072 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2018-09-23 21:17:34,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:34,073 INFO L225 Difference]: With dead ends: 95 [2018-09-23 21:17:34,073 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 21:17:34,074 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 [2018-09-23 21:17:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 21:17:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-09-23 21:17:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 21:17:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2018-09-23 21:17:34,079 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 83 [2018-09-23 21:17:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:34,080 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2018-09-23 21:17:34,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:17:34,080 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2018-09-23 21:17:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 21:17:34,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:34,081 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-09-23 21:17:34,081 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:34,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash -610287599, now seen corresponding path program 17 times [2018-09-23 21:17:34,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:34,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:34,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:34,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:34,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:34,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:34,383 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 [2018-09-23 21:17:34,391 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:17:34,433 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 21:17:34,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:34,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:35,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:35,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-09-23 21:17:35,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:17:35,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:17:35,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:17:35,370 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand 38 states. [2018-09-23 21:17:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:35,493 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2018-09-23 21:17:35,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:17:35,493 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2018-09-23 21:17:35,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:35,494 INFO L225 Difference]: With dead ends: 100 [2018-09-23 21:17:35,494 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 21:17:35,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:17:35,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 21:17:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-09-23 21:17:35,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 21:17:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 130 transitions. [2018-09-23 21:17:35,499 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 130 transitions. Word has length 88 [2018-09-23 21:17:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:35,500 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 130 transitions. [2018-09-23 21:17:35,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:17:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 130 transitions. [2018-09-23 21:17:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 21:17:35,501 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:35,501 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-09-23 21:17:35,501 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:35,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:35,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2059852480, now seen corresponding path program 18 times [2018-09-23 21:17:35,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:35,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:35,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:35,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:35,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:35,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:35,877 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 [2018-09-23 21:17:35,886 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:17:35,923 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:17:35,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:35,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:36,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:36,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-09-23 21:17:36,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:17:36,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:17:36,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:17:36,772 INFO L87 Difference]: Start difference. First operand 94 states and 130 transitions. Second operand 40 states. [2018-09-23 21:17:36,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:36,897 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2018-09-23 21:17:36,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:17:36,897 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 93 [2018-09-23 21:17:36,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:36,898 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:17:36,898 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 21:17:36,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:17:36,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 21:17:36,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-23 21:17:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 21:17:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2018-09-23 21:17:36,903 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 93 [2018-09-23 21:17:36,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:36,903 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2018-09-23 21:17:36,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:17:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2018-09-23 21:17:36,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:17:36,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:36,904 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-09-23 21:17:36,904 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:36,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:36,905 INFO L82 PathProgramCache]: Analyzing trace with hash -996141711, now seen corresponding path program 19 times [2018-09-23 21:17:36,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:36,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:36,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:36,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:36,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:37,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:37,221 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 [2018-09-23 21:17:37,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:37,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:38,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:38,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-09-23 21:17:38,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:17:38,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:17:38,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:17:38,260 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 42 states. [2018-09-23 21:17:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:38,392 INFO L93 Difference]: Finished difference Result 110 states and 152 transitions. [2018-09-23 21:17:38,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:17:38,393 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2018-09-23 21:17:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:38,394 INFO L225 Difference]: With dead ends: 110 [2018-09-23 21:17:38,394 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 21:17:38,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:17:38,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 21:17:38,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-09-23 21:17:38,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 21:17:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2018-09-23 21:17:38,399 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 98 [2018-09-23 21:17:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:38,399 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2018-09-23 21:17:38,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:17:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2018-09-23 21:17:38,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 21:17:38,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:38,401 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-09-23 21:17:38,401 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:38,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:38,401 INFO L82 PathProgramCache]: Analyzing trace with hash -511385248, now seen corresponding path program 20 times [2018-09-23 21:17:38,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:38,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:38,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:38,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:38,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:38,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:38,842 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 [2018-09-23 21:17:38,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:17:38,879 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:17:38,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:38,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:40,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:40,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-09-23 21:17:40,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:17:40,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:17:40,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:17:40,688 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand 44 states. [2018-09-23 21:17:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:40,998 INFO L93 Difference]: Finished difference Result 115 states and 159 transitions. [2018-09-23 21:17:41,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:17:41,001 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 103 [2018-09-23 21:17:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:41,003 INFO L225 Difference]: With dead ends: 115 [2018-09-23 21:17:41,003 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 21:17:41,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:17:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 21:17:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-09-23 21:17:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 21:17:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 151 transitions. [2018-09-23 21:17:41,008 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 151 transitions. Word has length 103 [2018-09-23 21:17:41,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:41,008 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 151 transitions. [2018-09-23 21:17:41,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:17:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 151 transitions. [2018-09-23 21:17:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 21:17:41,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:41,009 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-09-23 21:17:41,009 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:41,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:41,010 INFO L82 PathProgramCache]: Analyzing trace with hash 851260113, now seen corresponding path program 21 times [2018-09-23 21:17:41,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:41,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:41,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:41,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:41,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:41,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:41,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:17:41,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:17:41,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 21:17:41,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:41,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:42,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:42,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-09-23 21:17:42,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:17:42,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:17:42,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:17:42,704 INFO L87 Difference]: Start difference. First operand 109 states and 151 transitions. Second operand 46 states. [2018-09-23 21:17:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:42,959 INFO L93 Difference]: Finished difference Result 120 states and 166 transitions. [2018-09-23 21:17:42,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:17:42,961 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 108 [2018-09-23 21:17:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:42,962 INFO L225 Difference]: With dead ends: 120 [2018-09-23 21:17:42,962 INFO L226 Difference]: Without dead ends: 118 [2018-09-23 21:17:42,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:17:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-23 21:17:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-09-23 21:17:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 21:17:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2018-09-23 21:17:42,968 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 158 transitions. Word has length 108 [2018-09-23 21:17:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:42,968 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 158 transitions. [2018-09-23 21:17:42,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:17:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 158 transitions. [2018-09-23 21:17:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 21:17:42,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:42,970 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-09-23 21:17:42,970 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:42,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:42,970 INFO L82 PathProgramCache]: Analyzing trace with hash -572317696, now seen corresponding path program 22 times [2018-09-23 21:17:42,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:42,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:42,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:42,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:42,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:43,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:43,428 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 [2018-09-23 21:17:43,435 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:17:43,464 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:17:43,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:43,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:44,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:44,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-09-23 21:17:44,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:17:44,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:17:44,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:17:44,033 INFO L87 Difference]: Start difference. First operand 114 states and 158 transitions. Second operand 48 states. [2018-09-23 21:17:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:44,195 INFO L93 Difference]: Finished difference Result 125 states and 173 transitions. [2018-09-23 21:17:44,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:17:44,195 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 113 [2018-09-23 21:17:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:44,196 INFO L225 Difference]: With dead ends: 125 [2018-09-23 21:17:44,196 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 21:17:44,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:17:44,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 21:17:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-23 21:17:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 21:17:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 165 transitions. [2018-09-23 21:17:44,203 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 165 transitions. Word has length 113 [2018-09-23 21:17:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:44,203 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 165 transitions. [2018-09-23 21:17:44,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:17:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 165 transitions. [2018-09-23 21:17:44,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 21:17:44,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:44,204 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-09-23 21:17:44,204 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:44,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:44,204 INFO L82 PathProgramCache]: Analyzing trace with hash 513611825, now seen corresponding path program 23 times [2018-09-23 21:17:44,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:44,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:44,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:44,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:44,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:44,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:44,992 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 [2018-09-23 21:17:44,999 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:17:45,060 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 21:17:45,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:45,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:45,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:45,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-09-23 21:17:45,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:17:45,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:17:45,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:17:45,761 INFO L87 Difference]: Start difference. First operand 119 states and 165 transitions. Second operand 50 states. [2018-09-23 21:17:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:45,906 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2018-09-23 21:17:45,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:17:45,907 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 118 [2018-09-23 21:17:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:45,908 INFO L225 Difference]: With dead ends: 130 [2018-09-23 21:17:45,908 INFO L226 Difference]: Without dead ends: 128 [2018-09-23 21:17:45,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:17:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-23 21:17:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-09-23 21:17:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-23 21:17:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2018-09-23 21:17:45,914 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 118 [2018-09-23 21:17:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:45,914 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2018-09-23 21:17:45,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:17:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2018-09-23 21:17:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-23 21:17:45,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:45,915 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-09-23 21:17:45,916 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:45,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:45,916 INFO L82 PathProgramCache]: Analyzing trace with hash -285501792, now seen corresponding path program 24 times [2018-09-23 21:17:45,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:45,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:45,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:45,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:45,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:46,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:46,363 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 [2018-09-23 21:17:46,371 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:17:46,420 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:17:46,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:46,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:47,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:47,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-09-23 21:17:47,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:17:47,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:17:47,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:17:47,116 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand 52 states. [2018-09-23 21:17:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:47,256 INFO L93 Difference]: Finished difference Result 135 states and 187 transitions. [2018-09-23 21:17:47,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:17:47,260 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 123 [2018-09-23 21:17:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:47,261 INFO L225 Difference]: With dead ends: 135 [2018-09-23 21:17:47,261 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 21:17:47,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:17:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 21:17:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-09-23 21:17:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 21:17:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2018-09-23 21:17:47,268 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 123 [2018-09-23 21:17:47,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:47,269 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2018-09-23 21:17:47,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:17:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2018-09-23 21:17:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 21:17:47,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:47,270 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-09-23 21:17:47,270 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:47,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:47,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1768277393, now seen corresponding path program 25 times [2018-09-23 21:17:47,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:47,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:47,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:47,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:47,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:48,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:48,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:17:48,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:48,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:49,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:49,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-09-23 21:17:49,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:17:49,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:17:49,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:17:49,317 INFO L87 Difference]: Start difference. First operand 129 states and 179 transitions. Second operand 54 states. [2018-09-23 21:17:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:49,573 INFO L93 Difference]: Finished difference Result 140 states and 194 transitions. [2018-09-23 21:17:49,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:17:49,574 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 128 [2018-09-23 21:17:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:49,575 INFO L225 Difference]: With dead ends: 140 [2018-09-23 21:17:49,575 INFO L226 Difference]: Without dead ends: 138 [2018-09-23 21:17:49,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:17:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-23 21:17:49,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-09-23 21:17:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-23 21:17:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 186 transitions. [2018-09-23 21:17:49,581 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 186 transitions. Word has length 128 [2018-09-23 21:17:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:49,581 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 186 transitions. [2018-09-23 21:17:49,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:17:49,582 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 186 transitions. [2018-09-23 21:17:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-23 21:17:49,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:49,582 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-09-23 21:17:49,582 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:49,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:49,583 INFO L82 PathProgramCache]: Analyzing trace with hash -77052608, now seen corresponding path program 26 times [2018-09-23 21:17:49,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:49,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:49,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:49,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:17:49,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:50,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:50,252 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 [2018-09-23 21:17:50,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:17:50,295 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:17:50,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:50,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:51,145 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:51,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-09-23 21:17:51,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:17:51,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:17:51,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:17:51,147 INFO L87 Difference]: Start difference. First operand 134 states and 186 transitions. Second operand 56 states. [2018-09-23 21:17:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:51,398 INFO L93 Difference]: Finished difference Result 145 states and 201 transitions. [2018-09-23 21:17:51,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:17:51,398 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2018-09-23 21:17:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:51,399 INFO L225 Difference]: With dead ends: 145 [2018-09-23 21:17:51,399 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 21:17:51,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:17:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 21:17:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-23 21:17:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 21:17:51,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 193 transitions. [2018-09-23 21:17:51,405 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 193 transitions. Word has length 133 [2018-09-23 21:17:51,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:51,405 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 193 transitions. [2018-09-23 21:17:51,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:17:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 193 transitions. [2018-09-23 21:17:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 21:17:51,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:51,406 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-09-23 21:17:51,406 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:51,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1019034353, now seen corresponding path program 27 times [2018-09-23 21:17:51,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:51,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:51,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:51,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:51,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:51,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:51,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:17:51,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:17:52,043 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 21:17:52,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:52,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:52,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:52,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-09-23 21:17:52,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:17:52,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:17:52,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:17:52,857 INFO L87 Difference]: Start difference. First operand 139 states and 193 transitions. Second operand 58 states. [2018-09-23 21:17:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:53,066 INFO L93 Difference]: Finished difference Result 150 states and 208 transitions. [2018-09-23 21:17:53,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:17:53,067 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 138 [2018-09-23 21:17:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:53,068 INFO L225 Difference]: With dead ends: 150 [2018-09-23 21:17:53,068 INFO L226 Difference]: Without dead ends: 148 [2018-09-23 21:17:53,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:17:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-23 21:17:53,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-09-23 21:17:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-23 21:17:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 200 transitions. [2018-09-23 21:17:53,073 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 200 transitions. Word has length 138 [2018-09-23 21:17:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:53,074 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 200 transitions. [2018-09-23 21:17:53,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:17:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 200 transitions. [2018-09-23 21:17:53,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-23 21:17:53,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:53,075 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-09-23 21:17:53,075 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:53,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:53,076 INFO L82 PathProgramCache]: Analyzing trace with hash -247256096, now seen corresponding path program 28 times [2018-09-23 21:17:53,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:53,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:53,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:53,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:53,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:53,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:53,711 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 [2018-09-23 21:17:53,719 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:17:53,756 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:17:53,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:53,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:55,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:55,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-09-23 21:17:55,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:17:55,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:17:55,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:17:55,143 INFO L87 Difference]: Start difference. First operand 144 states and 200 transitions. Second operand 60 states. [2018-09-23 21:17:55,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:55,352 INFO L93 Difference]: Finished difference Result 155 states and 215 transitions. [2018-09-23 21:17:55,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:17:55,352 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 143 [2018-09-23 21:17:55,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:55,353 INFO L225 Difference]: With dead ends: 155 [2018-09-23 21:17:55,353 INFO L226 Difference]: Without dead ends: 153 [2018-09-23 21:17:55,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:17:55,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-23 21:17:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-09-23 21:17:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 21:17:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2018-09-23 21:17:55,360 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 143 [2018-09-23 21:17:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:55,361 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2018-09-23 21:17:55,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:17:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2018-09-23 21:17:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 21:17:55,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:55,362 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-09-23 21:17:55,362 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:55,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:55,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1791588433, now seen corresponding path program 29 times [2018-09-23 21:17:55,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:55,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:55,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:55,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:55,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:56,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:56,137 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 [2018-09-23 21:17:56,144 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:17:56,204 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 21:17:56,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:56,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:57,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:57,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-09-23 21:17:57,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:17:57,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:17:57,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:17:57,167 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand 62 states. [2018-09-23 21:17:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:57,392 INFO L93 Difference]: Finished difference Result 160 states and 222 transitions. [2018-09-23 21:17:57,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:17:57,392 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 148 [2018-09-23 21:17:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:57,394 INFO L225 Difference]: With dead ends: 160 [2018-09-23 21:17:57,394 INFO L226 Difference]: Without dead ends: 158 [2018-09-23 21:17:57,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:17:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-23 21:17:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-09-23 21:17:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-23 21:17:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 214 transitions. [2018-09-23 21:17:57,400 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 214 transitions. Word has length 148 [2018-09-23 21:17:57,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:57,400 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 214 transitions. [2018-09-23 21:17:57,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:17:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 214 transitions. [2018-09-23 21:17:57,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-23 21:17:57,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:57,402 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-09-23 21:17:57,402 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:57,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:57,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1713785472, now seen corresponding path program 30 times [2018-09-23 21:17:57,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:57,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:57,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:57,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:57,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:17:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:57,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:17:57,973 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 [2018-09-23 21:17:57,982 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:17:58,046 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 21:17:58,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:17:58,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:17:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:17:59,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:17:59,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-09-23 21:17:59,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:17:59,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:17:59,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:17:59,136 INFO L87 Difference]: Start difference. First operand 154 states and 214 transitions. Second operand 64 states. [2018-09-23 21:17:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:17:59,641 INFO L93 Difference]: Finished difference Result 165 states and 229 transitions. [2018-09-23 21:17:59,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:17:59,642 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 153 [2018-09-23 21:17:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:17:59,643 INFO L225 Difference]: With dead ends: 165 [2018-09-23 21:17:59,643 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 21:17:59,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:17:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 21:17:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-09-23 21:17:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 21:17:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 221 transitions. [2018-09-23 21:17:59,651 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 221 transitions. Word has length 153 [2018-09-23 21:17:59,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:17:59,651 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 221 transitions. [2018-09-23 21:17:59,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:17:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 221 transitions. [2018-09-23 21:17:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 21:17:59,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:17:59,652 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-09-23 21:17:59,653 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:17:59,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:17:59,653 INFO L82 PathProgramCache]: Analyzing trace with hash -835682895, now seen corresponding path program 31 times [2018-09-23 21:17:59,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:17:59,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:17:59,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:59,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:17:59,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:17:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:00,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:00,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:18:00,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:00,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:01,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:01,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-09-23 21:18:01,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:18:01,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:18:01,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:18:01,509 INFO L87 Difference]: Start difference. First operand 159 states and 221 transitions. Second operand 66 states. [2018-09-23 21:18:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:01,756 INFO L93 Difference]: Finished difference Result 170 states and 236 transitions. [2018-09-23 21:18:01,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:18:01,757 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 158 [2018-09-23 21:18:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:01,758 INFO L225 Difference]: With dead ends: 170 [2018-09-23 21:18:01,758 INFO L226 Difference]: Without dead ends: 168 [2018-09-23 21:18:01,759 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 [2018-09-23 21:18:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-09-23 21:18:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-09-23 21:18:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-23 21:18:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 228 transitions. [2018-09-23 21:18:01,765 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 228 transitions. Word has length 158 [2018-09-23 21:18:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:01,765 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 228 transitions. [2018-09-23 21:18:01,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:18:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 228 transitions. [2018-09-23 21:18:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-23 21:18:01,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:01,767 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-09-23 21:18:01,767 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:01,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:01,767 INFO L82 PathProgramCache]: Analyzing trace with hash 925606176, now seen corresponding path program 32 times [2018-09-23 21:18:01,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:01,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:01,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:01,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:01,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:02,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:02,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:18:02,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:18:02,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:18:02,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:02,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:03,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:03,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-09-23 21:18:03,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:18:03,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:18:03,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:18:03,702 INFO L87 Difference]: Start difference. First operand 164 states and 228 transitions. Second operand 68 states. [2018-09-23 21:18:03,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:03,963 INFO L93 Difference]: Finished difference Result 175 states and 243 transitions. [2018-09-23 21:18:03,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:18:03,971 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 163 [2018-09-23 21:18:03,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:03,972 INFO L225 Difference]: With dead ends: 175 [2018-09-23 21:18:03,973 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 21:18:03,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:18:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 21:18:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-09-23 21:18:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 21:18:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 235 transitions. [2018-09-23 21:18:03,980 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 235 transitions. Word has length 163 [2018-09-23 21:18:03,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:03,980 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 235 transitions. [2018-09-23 21:18:03,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:18:03,980 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 235 transitions. [2018-09-23 21:18:03,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-23 21:18:03,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:03,982 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-09-23 21:18:03,982 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:03,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:03,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1441248495, now seen corresponding path program 33 times [2018-09-23 21:18:03,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:03,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:03,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:03,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:03,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:05,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:05,924 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 [2018-09-23 21:18:05,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:18:06,013 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 21:18:06,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:06,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:07,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:07,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-09-23 21:18:07,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:18:07,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:18:07,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:18:07,134 INFO L87 Difference]: Start difference. First operand 169 states and 235 transitions. Second operand 70 states. [2018-09-23 21:18:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:07,536 INFO L93 Difference]: Finished difference Result 180 states and 250 transitions. [2018-09-23 21:18:07,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:18:07,536 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 168 [2018-09-23 21:18:07,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:07,538 INFO L225 Difference]: With dead ends: 180 [2018-09-23 21:18:07,538 INFO L226 Difference]: Without dead ends: 178 [2018-09-23 21:18:07,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:18:07,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-23 21:18:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-09-23 21:18:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-09-23 21:18:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 242 transitions. [2018-09-23 21:18:07,545 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 242 transitions. Word has length 168 [2018-09-23 21:18:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:07,546 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 242 transitions. [2018-09-23 21:18:07,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:18:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 242 transitions. [2018-09-23 21:18:07,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-23 21:18:07,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:07,547 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-09-23 21:18:07,547 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:07,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:07,548 INFO L82 PathProgramCache]: Analyzing trace with hash 686632896, now seen corresponding path program 34 times [2018-09-23 21:18:07,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:07,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:07,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:07,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:07,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:08,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:08,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:18:08,531 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:18:08,577 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:18:08,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:08,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:09,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:09,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-09-23 21:18:09,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:18:09,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:18:09,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:18:09,719 INFO L87 Difference]: Start difference. First operand 174 states and 242 transitions. Second operand 72 states. [2018-09-23 21:18:10,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:10,089 INFO L93 Difference]: Finished difference Result 185 states and 257 transitions. [2018-09-23 21:18:10,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:18:10,089 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 173 [2018-09-23 21:18:10,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:10,090 INFO L225 Difference]: With dead ends: 185 [2018-09-23 21:18:10,090 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 21:18:10,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:18:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 21:18:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-09-23 21:18:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 21:18:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 249 transitions. [2018-09-23 21:18:10,098 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 249 transitions. Word has length 173 [2018-09-23 21:18:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:10,099 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 249 transitions. [2018-09-23 21:18:10,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:18:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 249 transitions. [2018-09-23 21:18:10,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 21:18:10,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:10,100 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-09-23 21:18:10,100 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:10,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:10,101 INFO L82 PathProgramCache]: Analyzing trace with hash 170319985, now seen corresponding path program 35 times [2018-09-23 21:18:10,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:10,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:10,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:10,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:10,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:12,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:12,026 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 [2018-09-23 21:18:12,034 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:18:12,170 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 21:18:12,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:12,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:13,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:13,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-09-23 21:18:13,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:18:13,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:18:13,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:18:13,397 INFO L87 Difference]: Start difference. First operand 179 states and 249 transitions. Second operand 74 states. [2018-09-23 21:18:13,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:13,680 INFO L93 Difference]: Finished difference Result 190 states and 264 transitions. [2018-09-23 21:18:13,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:18:13,681 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 178 [2018-09-23 21:18:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:13,682 INFO L225 Difference]: With dead ends: 190 [2018-09-23 21:18:13,682 INFO L226 Difference]: Without dead ends: 188 [2018-09-23 21:18:13,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:18:13,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-09-23 21:18:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-09-23 21:18:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-23 21:18:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2018-09-23 21:18:13,689 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 178 [2018-09-23 21:18:13,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:13,690 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2018-09-23 21:18:13,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:18:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2018-09-23 21:18:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-23 21:18:13,691 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:13,691 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-09-23 21:18:13,691 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:13,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:13,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2021329312, now seen corresponding path program 36 times [2018-09-23 21:18:13,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:13,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:13,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:13,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:13,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:14,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:14,556 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 [2018-09-23 21:18:14,564 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:18:14,641 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 21:18:14,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:14,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:17,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:17,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-09-23 21:18:17,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:18:17,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:18:17,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:18:17,248 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand 76 states. [2018-09-23 21:18:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:17,679 INFO L93 Difference]: Finished difference Result 195 states and 271 transitions. [2018-09-23 21:18:17,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:18:17,679 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 183 [2018-09-23 21:18:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:17,680 INFO L225 Difference]: With dead ends: 195 [2018-09-23 21:18:17,680 INFO L226 Difference]: Without dead ends: 193 [2018-09-23 21:18:17,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:18:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-23 21:18:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-09-23 21:18:17,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-23 21:18:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 263 transitions. [2018-09-23 21:18:17,687 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 263 transitions. Word has length 183 [2018-09-23 21:18:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:17,688 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 263 transitions. [2018-09-23 21:18:17,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:18:17,688 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 263 transitions. [2018-09-23 21:18:17,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 21:18:17,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:17,689 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-09-23 21:18:17,689 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:17,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:17,690 INFO L82 PathProgramCache]: Analyzing trace with hash 578960849, now seen corresponding path program 37 times [2018-09-23 21:18:17,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:17,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:17,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:17,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:17,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:20,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:20,095 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 [2018-09-23 21:18:20,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:20,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:21,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:21,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-09-23 21:18:21,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:18:21,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:18:21,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:18:21,755 INFO L87 Difference]: Start difference. First operand 189 states and 263 transitions. Second operand 78 states. [2018-09-23 21:18:22,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:22,102 INFO L93 Difference]: Finished difference Result 200 states and 278 transitions. [2018-09-23 21:18:22,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:18:22,103 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 188 [2018-09-23 21:18:22,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:22,104 INFO L225 Difference]: With dead ends: 200 [2018-09-23 21:18:22,104 INFO L226 Difference]: Without dead ends: 198 [2018-09-23 21:18:22,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:18:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-09-23 21:18:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-09-23 21:18:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-23 21:18:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 270 transitions. [2018-09-23 21:18:22,112 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 270 transitions. Word has length 188 [2018-09-23 21:18:22,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:22,112 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 270 transitions. [2018-09-23 21:18:22,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:18:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 270 transitions. [2018-09-23 21:18:22,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-23 21:18:22,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:22,114 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-09-23 21:18:22,114 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:22,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:22,114 INFO L82 PathProgramCache]: Analyzing trace with hash -963840768, now seen corresponding path program 38 times [2018-09-23 21:18:22,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:22,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:22,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:22,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:22,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:23,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:23,011 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 [2018-09-23 21:18:23,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:18:23,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:18:23,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:23,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:24,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:24,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2018-09-23 21:18:24,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:18:24,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:18:24,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:18:24,517 INFO L87 Difference]: Start difference. First operand 194 states and 270 transitions. Second operand 80 states. [2018-09-23 21:18:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:24,908 INFO L93 Difference]: Finished difference Result 205 states and 285 transitions. [2018-09-23 21:18:24,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:18:24,908 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 193 [2018-09-23 21:18:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:24,909 INFO L225 Difference]: With dead ends: 205 [2018-09-23 21:18:24,909 INFO L226 Difference]: Without dead ends: 203 [2018-09-23 21:18:24,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:18:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-23 21:18:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-09-23 21:18:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-23 21:18:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 277 transitions. [2018-09-23 21:18:24,916 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 277 transitions. Word has length 193 [2018-09-23 21:18:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:24,916 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 277 transitions. [2018-09-23 21:18:24,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:18:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 277 transitions. [2018-09-23 21:18:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-23 21:18:24,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:24,918 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-09-23 21:18:24,918 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:24,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:24,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1345297615, now seen corresponding path program 39 times [2018-09-23 21:18:24,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:24,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:24,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:24,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:24,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:26,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:26,580 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 [2018-09-23 21:18:26,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:18:26,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 21:18:26,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:26,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:28,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:28,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-09-23 21:18:28,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:18:28,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:18:28,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:18:28,171 INFO L87 Difference]: Start difference. First operand 199 states and 277 transitions. Second operand 82 states. [2018-09-23 21:18:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:28,592 INFO L93 Difference]: Finished difference Result 210 states and 292 transitions. [2018-09-23 21:18:28,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:18:28,593 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 198 [2018-09-23 21:18:28,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:28,594 INFO L225 Difference]: With dead ends: 210 [2018-09-23 21:18:28,594 INFO L226 Difference]: Without dead ends: 208 [2018-09-23 21:18:28,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:18:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-23 21:18:28,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-09-23 21:18:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-09-23 21:18:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 284 transitions. [2018-09-23 21:18:28,601 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 284 transitions. Word has length 198 [2018-09-23 21:18:28,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:28,601 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 284 transitions. [2018-09-23 21:18:28,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:18:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 284 transitions. [2018-09-23 21:18:28,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-23 21:18:28,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:28,602 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-09-23 21:18:28,602 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:28,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:28,602 INFO L82 PathProgramCache]: Analyzing trace with hash 555690912, now seen corresponding path program 40 times [2018-09-23 21:18:28,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:28,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:28,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:28,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:28,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:29,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:29,865 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 [2018-09-23 21:18:29,872 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:18:29,923 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:18:29,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:29,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:31,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:31,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 83 [2018-09-23 21:18:31,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 21:18:31,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 21:18:31,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:18:31,654 INFO L87 Difference]: Start difference. First operand 204 states and 284 transitions. Second operand 84 states. [2018-09-23 21:18:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:31,990 INFO L93 Difference]: Finished difference Result 215 states and 299 transitions. [2018-09-23 21:18:31,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:18:31,991 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 203 [2018-09-23 21:18:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:31,992 INFO L225 Difference]: With dead ends: 215 [2018-09-23 21:18:31,992 INFO L226 Difference]: Without dead ends: 213 [2018-09-23 21:18:31,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:18:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-23 21:18:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-09-23 21:18:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-23 21:18:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 291 transitions. [2018-09-23 21:18:32,000 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 291 transitions. Word has length 203 [2018-09-23 21:18:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:32,000 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 291 transitions. [2018-09-23 21:18:32,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 21:18:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 291 transitions. [2018-09-23 21:18:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-23 21:18:32,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:32,001 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-09-23 21:18:32,001 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:32,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:32,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1463242897, now seen corresponding path program 41 times [2018-09-23 21:18:32,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:32,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:32,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:32,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:32,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:32,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:32,926 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 [2018-09-23 21:18:32,934 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:18:33,024 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 21:18:33,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:33,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:36,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:36,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-09-23 21:18:36,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 21:18:36,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 21:18:36,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:18:36,895 INFO L87 Difference]: Start difference. First operand 209 states and 291 transitions. Second operand 86 states. [2018-09-23 21:18:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:37,299 INFO L93 Difference]: Finished difference Result 220 states and 306 transitions. [2018-09-23 21:18:37,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:18:37,299 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 208 [2018-09-23 21:18:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:37,300 INFO L225 Difference]: With dead ends: 220 [2018-09-23 21:18:37,300 INFO L226 Difference]: Without dead ends: 218 [2018-09-23 21:18:37,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:18:37,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-23 21:18:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-09-23 21:18:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-23 21:18:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 298 transitions. [2018-09-23 21:18:37,306 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 298 transitions. Word has length 208 [2018-09-23 21:18:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:37,307 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 298 transitions. [2018-09-23 21:18:37,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 21:18:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 298 transitions. [2018-09-23 21:18:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-23 21:18:37,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:37,308 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-09-23 21:18:37,308 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:37,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:37,308 INFO L82 PathProgramCache]: Analyzing trace with hash 970299968, now seen corresponding path program 42 times [2018-09-23 21:18:37,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:37,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:37,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:37,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:37,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:38,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:38,400 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 [2018-09-23 21:18:38,409 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:18:38,503 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 21:18:38,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:38,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:40,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:40,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 87 [2018-09-23 21:18:40,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 21:18:40,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 21:18:40,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:18:40,232 INFO L87 Difference]: Start difference. First operand 214 states and 298 transitions. Second operand 88 states. [2018-09-23 21:18:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:40,664 INFO L93 Difference]: Finished difference Result 225 states and 313 transitions. [2018-09-23 21:18:40,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:18:40,665 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 213 [2018-09-23 21:18:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:40,666 INFO L225 Difference]: With dead ends: 225 [2018-09-23 21:18:40,666 INFO L226 Difference]: Without dead ends: 223 [2018-09-23 21:18:40,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:18:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-23 21:18:40,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-09-23 21:18:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-23 21:18:40,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 305 transitions. [2018-09-23 21:18:40,672 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 305 transitions. Word has length 213 [2018-09-23 21:18:40,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:40,672 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 305 transitions. [2018-09-23 21:18:40,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 21:18:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 305 transitions. [2018-09-23 21:18:40,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-23 21:18:40,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:40,674 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-09-23 21:18:40,674 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:40,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:40,674 INFO L82 PathProgramCache]: Analyzing trace with hash 106759665, now seen corresponding path program 43 times [2018-09-23 21:18:40,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:40,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:40,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:40,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:40,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:42,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:42,034 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 [2018-09-23 21:18:42,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:42,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:43,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:43,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 89 [2018-09-23 21:18:43,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 21:18:43,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 21:18:43,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:18:43,696 INFO L87 Difference]: Start difference. First operand 219 states and 305 transitions. Second operand 90 states. [2018-09-23 21:18:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:44,151 INFO L93 Difference]: Finished difference Result 230 states and 320 transitions. [2018-09-23 21:18:44,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:18:44,151 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 218 [2018-09-23 21:18:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:44,152 INFO L225 Difference]: With dead ends: 230 [2018-09-23 21:18:44,153 INFO L226 Difference]: Without dead ends: 228 [2018-09-23 21:18:44,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:18:44,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-09-23 21:18:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-09-23 21:18:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-09-23 21:18:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 312 transitions. [2018-09-23 21:18:44,158 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 312 transitions. Word has length 218 [2018-09-23 21:18:44,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:44,158 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 312 transitions. [2018-09-23 21:18:44,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 21:18:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 312 transitions. [2018-09-23 21:18:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-23 21:18:44,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:44,159 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-09-23 21:18:44,159 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:44,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:44,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1161150240, now seen corresponding path program 44 times [2018-09-23 21:18:44,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:44,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:44,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:44,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:44,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:45,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:45,134 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 [2018-09-23 21:18:45,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:18:45,192 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:18:45,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:45,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:47,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:47,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 91 [2018-09-23 21:18:47,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 21:18:47,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 21:18:47,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:18:47,104 INFO L87 Difference]: Start difference. First operand 224 states and 312 transitions. Second operand 92 states. [2018-09-23 21:18:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:47,746 INFO L93 Difference]: Finished difference Result 235 states and 327 transitions. [2018-09-23 21:18:47,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:18:47,746 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 223 [2018-09-23 21:18:47,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:47,747 INFO L225 Difference]: With dead ends: 235 [2018-09-23 21:18:47,747 INFO L226 Difference]: Without dead ends: 233 [2018-09-23 21:18:47,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:18:47,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-23 21:18:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-09-23 21:18:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-23 21:18:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 319 transitions. [2018-09-23 21:18:47,754 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 319 transitions. Word has length 223 [2018-09-23 21:18:47,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:47,755 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 319 transitions. [2018-09-23 21:18:47,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 21:18:47,755 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 319 transitions. [2018-09-23 21:18:47,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-23 21:18:47,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:47,756 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-09-23 21:18:47,756 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:47,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:47,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1399292753, now seen corresponding path program 45 times [2018-09-23 21:18:47,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:47,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:47,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:47,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:47,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:48,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:48,892 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 [2018-09-23 21:18:48,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:18:49,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-23 21:18:49,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:49,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:50,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:50,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2018-09-23 21:18:50,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 21:18:50,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 21:18:50,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:18:50,764 INFO L87 Difference]: Start difference. First operand 229 states and 319 transitions. Second operand 94 states. [2018-09-23 21:18:51,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:51,280 INFO L93 Difference]: Finished difference Result 240 states and 334 transitions. [2018-09-23 21:18:51,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:18:51,280 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 228 [2018-09-23 21:18:51,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:51,281 INFO L225 Difference]: With dead ends: 240 [2018-09-23 21:18:51,281 INFO L226 Difference]: Without dead ends: 238 [2018-09-23 21:18:51,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:18:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-09-23 21:18:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-09-23 21:18:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-09-23 21:18:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2018-09-23 21:18:51,289 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 228 [2018-09-23 21:18:51,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:51,289 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2018-09-23 21:18:51,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 21:18:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2018-09-23 21:18:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-23 21:18:51,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:51,291 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-09-23 21:18:51,291 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:51,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:51,292 INFO L82 PathProgramCache]: Analyzing trace with hash -174645376, now seen corresponding path program 46 times [2018-09-23 21:18:51,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:51,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:51,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:51,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:51,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:52,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:52,521 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 [2018-09-23 21:18:52,529 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:18:52,605 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:18:52,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:52,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:54,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:54,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2018-09-23 21:18:54,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 21:18:54,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 21:18:54,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:18:54,655 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand 96 states. [2018-09-23 21:18:55,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:55,233 INFO L93 Difference]: Finished difference Result 245 states and 341 transitions. [2018-09-23 21:18:55,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:18:55,234 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 233 [2018-09-23 21:18:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:55,235 INFO L225 Difference]: With dead ends: 245 [2018-09-23 21:18:55,235 INFO L226 Difference]: Without dead ends: 243 [2018-09-23 21:18:55,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:18:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-23 21:18:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-09-23 21:18:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-23 21:18:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 333 transitions. [2018-09-23 21:18:55,243 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 333 transitions. Word has length 233 [2018-09-23 21:18:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:55,243 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 333 transitions. [2018-09-23 21:18:55,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 21:18:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 333 transitions. [2018-09-23 21:18:55,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-23 21:18:55,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:55,245 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-09-23 21:18:55,245 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:55,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:55,245 INFO L82 PathProgramCache]: Analyzing trace with hash -587413327, now seen corresponding path program 47 times [2018-09-23 21:18:55,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:55,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:55,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:55,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:55,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:56,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:56,694 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 [2018-09-23 21:18:56,700 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:18:56,812 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-23 21:18:56,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:56,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:58,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:58,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2018-09-23 21:18:58,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 21:18:58,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 21:18:58,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:18:58,774 INFO L87 Difference]: Start difference. First operand 239 states and 333 transitions. Second operand 98 states. [2018-09-23 21:18:59,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:59,321 INFO L93 Difference]: Finished difference Result 250 states and 348 transitions. [2018-09-23 21:18:59,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:18:59,322 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 238 [2018-09-23 21:18:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:59,324 INFO L225 Difference]: With dead ends: 250 [2018-09-23 21:18:59,324 INFO L226 Difference]: Without dead ends: 248 [2018-09-23 21:18:59,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:18:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-09-23 21:18:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-09-23 21:18:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-23 21:18:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2018-09-23 21:18:59,332 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 238 [2018-09-23 21:18:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:59,332 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2018-09-23 21:18:59,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 21:18:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2018-09-23 21:18:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-23 21:18:59,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:59,334 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-09-23 21:18:59,334 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:59,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:59,334 INFO L82 PathProgramCache]: Analyzing trace with hash -2091502048, now seen corresponding path program 48 times [2018-09-23 21:18:59,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:59,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:59,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:59,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:59,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:00,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:00,476 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 [2018-09-23 21:19:00,483 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:19:00,588 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 21:19:00,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:00,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:02,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:02,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 99 [2018-09-23 21:19:02,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 21:19:02,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 21:19:02,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:19:02,735 INFO L87 Difference]: Start difference. First operand 244 states and 340 transitions. Second operand 100 states. [2018-09-23 21:19:03,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:03,450 INFO L93 Difference]: Finished difference Result 255 states and 355 transitions. [2018-09-23 21:19:03,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:19:03,451 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 243 [2018-09-23 21:19:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:03,452 INFO L225 Difference]: With dead ends: 255 [2018-09-23 21:19:03,452 INFO L226 Difference]: Without dead ends: 253 [2018-09-23 21:19:03,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:19:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-23 21:19:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-09-23 21:19:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-23 21:19:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 347 transitions. [2018-09-23 21:19:03,458 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 347 transitions. Word has length 243 [2018-09-23 21:19:03,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:03,458 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 347 transitions. [2018-09-23 21:19:03,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 21:19:03,459 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 347 transitions. [2018-09-23 21:19:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-23 21:19:03,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:03,460 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-09-23 21:19:03,460 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:03,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:03,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1438460399, now seen corresponding path program 49 times [2018-09-23 21:19:03,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:03,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:03,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:03,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:03,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:04,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:04,760 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 [2018-09-23 21:19:04,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:04,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:07,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:07,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2018-09-23 21:19:07,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 21:19:07,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 21:19:07,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:19:07,205 INFO L87 Difference]: Start difference. First operand 249 states and 347 transitions. Second operand 102 states. [2018-09-23 21:19:07,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:07,812 INFO L93 Difference]: Finished difference Result 260 states and 362 transitions. [2018-09-23 21:19:07,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:19:07,812 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 248 [2018-09-23 21:19:07,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:07,813 INFO L225 Difference]: With dead ends: 260 [2018-09-23 21:19:07,814 INFO L226 Difference]: Without dead ends: 258 [2018-09-23 21:19:07,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:19:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-09-23 21:19:07,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2018-09-23 21:19:07,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-09-23 21:19:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2018-09-23 21:19:07,822 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 248 [2018-09-23 21:19:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:07,822 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2018-09-23 21:19:07,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 21:19:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2018-09-23 21:19:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-09-23 21:19:07,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:07,824 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1] [2018-09-23 21:19:07,824 INFO L423 AbstractCegarLoop]: === Iteration 52 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:07,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:07,824 INFO L82 PathProgramCache]: Analyzing trace with hash -459176768, now seen corresponding path program 50 times [2018-09-23 21:19:07,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:07,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:07,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:07,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:07,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:09,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:09,044 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 [2018-09-23 21:19:09,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:19:09,113 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:19:09,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:09,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:11,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:11,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 103 [2018-09-23 21:19:11,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 21:19:11,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 21:19:11,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:19:11,239 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand 104 states. [2018-09-23 21:19:12,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:12,081 INFO L93 Difference]: Finished difference Result 265 states and 369 transitions. [2018-09-23 21:19:12,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:19:12,081 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 253 [2018-09-23 21:19:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:12,083 INFO L225 Difference]: With dead ends: 265 [2018-09-23 21:19:12,083 INFO L226 Difference]: Without dead ends: 263 [2018-09-23 21:19:12,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:19:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-23 21:19:12,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-09-23 21:19:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-23 21:19:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 361 transitions. [2018-09-23 21:19:12,092 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 361 transitions. Word has length 253 [2018-09-23 21:19:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:12,093 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 361 transitions. [2018-09-23 21:19:12,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 21:19:12,093 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 361 transitions. [2018-09-23 21:19:12,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-23 21:19:12,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:12,095 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1] [2018-09-23 21:19:12,095 INFO L423 AbstractCegarLoop]: === Iteration 53 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:12,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:12,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1965053071, now seen corresponding path program 51 times [2018-09-23 21:19:12,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:12,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:12,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:12,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:12,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:13,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:13,447 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 [2018-09-23 21:19:13,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:19:13,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 21:19:13,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:13,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:15,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:15,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2018-09-23 21:19:15,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 21:19:15,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 21:19:15,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:19:15,746 INFO L87 Difference]: Start difference. First operand 259 states and 361 transitions. Second operand 106 states. [2018-09-23 21:19:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:16,377 INFO L93 Difference]: Finished difference Result 270 states and 376 transitions. [2018-09-23 21:19:16,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:19:16,377 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 258 [2018-09-23 21:19:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:16,378 INFO L225 Difference]: With dead ends: 270 [2018-09-23 21:19:16,378 INFO L226 Difference]: Without dead ends: 268 [2018-09-23 21:19:16,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:19:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-09-23 21:19:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2018-09-23 21:19:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-09-23 21:19:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 368 transitions. [2018-09-23 21:19:16,384 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 368 transitions. Word has length 258 [2018-09-23 21:19:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:16,385 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 368 transitions. [2018-09-23 21:19:16,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 21:19:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 368 transitions. [2018-09-23 21:19:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-09-23 21:19:16,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:16,386 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1] [2018-09-23 21:19:16,387 INFO L423 AbstractCegarLoop]: === Iteration 54 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:16,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash 563284832, now seen corresponding path program 52 times [2018-09-23 21:19:16,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:16,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:16,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:16,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:16,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:17,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:17,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:19:17,999 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:19:18,062 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:19:18,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:18,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:20,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:20,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 107 [2018-09-23 21:19:20,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 21:19:20,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 21:19:20,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:19:20,288 INFO L87 Difference]: Start difference. First operand 264 states and 368 transitions. Second operand 108 states. [2018-09-23 21:19:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:20,920 INFO L93 Difference]: Finished difference Result 275 states and 383 transitions. [2018-09-23 21:19:20,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:19:20,920 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 263 [2018-09-23 21:19:20,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:20,922 INFO L225 Difference]: With dead ends: 275 [2018-09-23 21:19:20,922 INFO L226 Difference]: Without dead ends: 273 [2018-09-23 21:19:20,923 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 [2018-09-23 21:19:20,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-09-23 21:19:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2018-09-23 21:19:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-09-23 21:19:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2018-09-23 21:19:20,928 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 263 [2018-09-23 21:19:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:20,928 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2018-09-23 21:19:20,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 21:19:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2018-09-23 21:19:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-23 21:19:20,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:20,929 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1] [2018-09-23 21:19:20,929 INFO L423 AbstractCegarLoop]: === Iteration 55 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:20,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:20,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1996048593, now seen corresponding path program 53 times [2018-09-23 21:19:20,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:20,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:20,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:20,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:20,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:22,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:22,593 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 [2018-09-23 21:19:22,600 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:19:22,726 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-23 21:19:22,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:22,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:25,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:25,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 109 [2018-09-23 21:19:25,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 21:19:25,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 21:19:25,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 21:19:25,011 INFO L87 Difference]: Start difference. First operand 269 states and 375 transitions. Second operand 110 states. [2018-09-23 21:19:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:25,667 INFO L93 Difference]: Finished difference Result 280 states and 390 transitions. [2018-09-23 21:19:25,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:19:25,667 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 268 [2018-09-23 21:19:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:25,668 INFO L225 Difference]: With dead ends: 280 [2018-09-23 21:19:25,668 INFO L226 Difference]: Without dead ends: 278 [2018-09-23 21:19:25,669 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 [2018-09-23 21:19:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-09-23 21:19:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2018-09-23 21:19:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-09-23 21:19:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 382 transitions. [2018-09-23 21:19:25,675 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 382 transitions. Word has length 268 [2018-09-23 21:19:25,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:25,675 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 382 transitions. [2018-09-23 21:19:25,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 21:19:25,675 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 382 transitions. [2018-09-23 21:19:25,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-09-23 21:19:25,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:25,676 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1] [2018-09-23 21:19:25,677 INFO L423 AbstractCegarLoop]: === Iteration 56 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:25,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:25,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1774504448, now seen corresponding path program 54 times [2018-09-23 21:19:25,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:25,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:25,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:25,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:25,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:27,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:27,317 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 [2018-09-23 21:19:27,325 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:19:27,458 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 21:19:27,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:27,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:29,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:29,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 111 [2018-09-23 21:19:29,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-23 21:19:29,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-23 21:19:29,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 21:19:29,822 INFO L87 Difference]: Start difference. First operand 274 states and 382 transitions. Second operand 112 states. [2018-09-23 21:19:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:30,547 INFO L93 Difference]: Finished difference Result 285 states and 397 transitions. [2018-09-23 21:19:30,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:19:30,548 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 273 [2018-09-23 21:19:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:30,549 INFO L225 Difference]: With dead ends: 285 [2018-09-23 21:19:30,549 INFO L226 Difference]: Without dead ends: 283 [2018-09-23 21:19:30,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 21:19:30,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-23 21:19:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-09-23 21:19:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-23 21:19:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 389 transitions. [2018-09-23 21:19:30,558 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 389 transitions. Word has length 273 [2018-09-23 21:19:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:30,558 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 389 transitions. [2018-09-23 21:19:30,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-23 21:19:30,559 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 389 transitions. [2018-09-23 21:19:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-23 21:19:30,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:30,560 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1] [2018-09-23 21:19:30,560 INFO L423 AbstractCegarLoop]: === Iteration 57 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:30,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:30,560 INFO L82 PathProgramCache]: Analyzing trace with hash -281694671, now seen corresponding path program 55 times [2018-09-23 21:19:30,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:30,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:30,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:30,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:30,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:32,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:32,078 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 [2018-09-23 21:19:32,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:32,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:34,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:34,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 113 [2018-09-23 21:19:34,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-23 21:19:34,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-23 21:19:34,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 21:19:34,730 INFO L87 Difference]: Start difference. First operand 279 states and 389 transitions. Second operand 114 states. [2018-09-23 21:19:35,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:35,483 INFO L93 Difference]: Finished difference Result 290 states and 404 transitions. [2018-09-23 21:19:35,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:19:35,483 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 278 [2018-09-23 21:19:35,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:35,484 INFO L225 Difference]: With dead ends: 290 [2018-09-23 21:19:35,484 INFO L226 Difference]: Without dead ends: 288 [2018-09-23 21:19:35,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 21:19:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-09-23 21:19:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2018-09-23 21:19:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-09-23 21:19:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 396 transitions. [2018-09-23 21:19:35,490 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 396 transitions. Word has length 278 [2018-09-23 21:19:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:35,490 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 396 transitions. [2018-09-23 21:19:35,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-23 21:19:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 396 transitions. [2018-09-23 21:19:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-09-23 21:19:35,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:35,491 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1] [2018-09-23 21:19:35,492 INFO L423 AbstractCegarLoop]: === Iteration 58 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:35,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:35,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1269776224, now seen corresponding path program 56 times [2018-09-23 21:19:35,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:35,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:35,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:35,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:35,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:37,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:37,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:19:37,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:19:37,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:19:37,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:37,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:39,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:39,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 115 [2018-09-23 21:19:39,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-23 21:19:39,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-23 21:19:39,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 21:19:39,910 INFO L87 Difference]: Start difference. First operand 284 states and 396 transitions. Second operand 116 states. [2018-09-23 21:19:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:40,595 INFO L93 Difference]: Finished difference Result 295 states and 411 transitions. [2018-09-23 21:19:40,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:19:40,595 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 283 [2018-09-23 21:19:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:40,597 INFO L225 Difference]: With dead ends: 295 [2018-09-23 21:19:40,597 INFO L226 Difference]: Without dead ends: 293 [2018-09-23 21:19:40,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 21:19:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-09-23 21:19:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2018-09-23 21:19:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-09-23 21:19:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 403 transitions. [2018-09-23 21:19:40,604 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 403 transitions. Word has length 283 [2018-09-23 21:19:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:40,604 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 403 transitions. [2018-09-23 21:19:40,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-23 21:19:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 403 transitions. [2018-09-23 21:19:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-09-23 21:19:40,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:40,606 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1] [2018-09-23 21:19:40,606 INFO L423 AbstractCegarLoop]: === Iteration 59 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:40,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:40,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1555749777, now seen corresponding path program 57 times [2018-09-23 21:19:40,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:40,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:40,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:40,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:40,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:42,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:42,890 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 [2018-09-23 21:19:42,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:19:43,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-23 21:19:43,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:43,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:45,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:45,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 117 [2018-09-23 21:19:45,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-23 21:19:45,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-23 21:19:45,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 21:19:45,714 INFO L87 Difference]: Start difference. First operand 289 states and 403 transitions. Second operand 118 states. [2018-09-23 21:19:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:46,495 INFO L93 Difference]: Finished difference Result 300 states and 418 transitions. [2018-09-23 21:19:46,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:19:46,495 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 288 [2018-09-23 21:19:46,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:46,496 INFO L225 Difference]: With dead ends: 300 [2018-09-23 21:19:46,496 INFO L226 Difference]: Without dead ends: 298 [2018-09-23 21:19:46,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 21:19:46,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-09-23 21:19:46,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2018-09-23 21:19:46,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-09-23 21:19:46,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 410 transitions. [2018-09-23 21:19:46,504 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 410 transitions. Word has length 288 [2018-09-23 21:19:46,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:46,505 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 410 transitions. [2018-09-23 21:19:46,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-23 21:19:46,505 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 410 transitions. [2018-09-23 21:19:46,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-09-23 21:19:46,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:46,507 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1] [2018-09-23 21:19:46,507 INFO L423 AbstractCegarLoop]: === Iteration 60 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:46,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:46,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1607528256, now seen corresponding path program 58 times [2018-09-23 21:19:46,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:46,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:46,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:46,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:46,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:48,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:48,522 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 [2018-09-23 21:19:48,532 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:19:48,602 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:19:48,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:48,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:51,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:51,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 119 [2018-09-23 21:19:51,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-23 21:19:51,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-23 21:19:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 21:19:51,432 INFO L87 Difference]: Start difference. First operand 294 states and 410 transitions. Second operand 120 states. [2018-09-23 21:19:52,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:52,174 INFO L93 Difference]: Finished difference Result 305 states and 425 transitions. [2018-09-23 21:19:52,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:19:52,174 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 293 [2018-09-23 21:19:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:52,175 INFO L225 Difference]: With dead ends: 305 [2018-09-23 21:19:52,175 INFO L226 Difference]: Without dead ends: 303 [2018-09-23 21:19:52,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 21:19:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-23 21:19:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2018-09-23 21:19:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-23 21:19:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 417 transitions. [2018-09-23 21:19:52,183 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 417 transitions. Word has length 293 [2018-09-23 21:19:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:52,184 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 417 transitions. [2018-09-23 21:19:52,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-23 21:19:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 417 transitions. [2018-09-23 21:19:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-23 21:19:52,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:52,185 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1] [2018-09-23 21:19:52,186 INFO L423 AbstractCegarLoop]: === Iteration 61 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:52,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:52,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1898893553, now seen corresponding path program 59 times [2018-09-23 21:19:52,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:52,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:52,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:52,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:52,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:54,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:54,142 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 [2018-09-23 21:19:54,149 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:19:54,289 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-23 21:19:54,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:54,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:57,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:57,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 121 [2018-09-23 21:19:57,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-23 21:19:57,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-23 21:19:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 21:19:57,116 INFO L87 Difference]: Start difference. First operand 299 states and 417 transitions. Second operand 122 states. [2018-09-23 21:19:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:58,014 INFO L93 Difference]: Finished difference Result 310 states and 432 transitions. [2018-09-23 21:19:58,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:19:58,014 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 298 [2018-09-23 21:19:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:58,015 INFO L225 Difference]: With dead ends: 310 [2018-09-23 21:19:58,015 INFO L226 Difference]: Without dead ends: 308 [2018-09-23 21:19:58,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 21:19:58,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-09-23 21:19:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2018-09-23 21:19:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-09-23 21:19:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 424 transitions. [2018-09-23 21:19:58,022 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 424 transitions. Word has length 298 [2018-09-23 21:19:58,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:58,022 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 424 transitions. [2018-09-23 21:19:58,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-23 21:19:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 424 transitions. [2018-09-23 21:19:58,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-09-23 21:19:58,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:58,023 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1] [2018-09-23 21:19:58,024 INFO L423 AbstractCegarLoop]: === Iteration 62 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:58,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash -765504032, now seen corresponding path program 60 times [2018-09-23 21:19:58,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:58,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:58,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:58,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:58,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:59,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:59,775 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 [2018-09-23 21:19:59,784 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:19:59,927 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-23 21:19:59,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:59,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:02,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:02,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 123 [2018-09-23 21:20:02,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-23 21:20:02,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-23 21:20:02,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-23 21:20:02,865 INFO L87 Difference]: Start difference. First operand 304 states and 424 transitions. Second operand 124 states. [2018-09-23 21:20:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:03,729 INFO L93 Difference]: Finished difference Result 315 states and 439 transitions. [2018-09-23 21:20:03,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:20:03,729 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 303 [2018-09-23 21:20:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:03,730 INFO L225 Difference]: With dead ends: 315 [2018-09-23 21:20:03,730 INFO L226 Difference]: Without dead ends: 313 [2018-09-23 21:20:03,731 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 [2018-09-23 21:20:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-09-23 21:20:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2018-09-23 21:20:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-09-23 21:20:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 431 transitions. [2018-09-23 21:20:03,739 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 431 transitions. Word has length 303 [2018-09-23 21:20:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:03,739 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 431 transitions. [2018-09-23 21:20:03,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-23 21:20:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 431 transitions. [2018-09-23 21:20:03,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-09-23 21:20:03,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:03,741 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1] [2018-09-23 21:20:03,741 INFO L423 AbstractCegarLoop]: === Iteration 63 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:03,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:03,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2034790831, now seen corresponding path program 61 times [2018-09-23 21:20:03,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:03,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:03,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:03,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:03,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:05,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:05,535 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 [2018-09-23 21:20:05,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:05,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:08,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:08,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 125 [2018-09-23 21:20:08,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-23 21:20:08,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-23 21:20:08,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 21:20:08,755 INFO L87 Difference]: Start difference. First operand 309 states and 431 transitions. Second operand 126 states. [2018-09-23 21:20:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:09,718 INFO L93 Difference]: Finished difference Result 320 states and 446 transitions. [2018-09-23 21:20:09,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:20:09,718 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 308 [2018-09-23 21:20:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:09,720 INFO L225 Difference]: With dead ends: 320 [2018-09-23 21:20:09,720 INFO L226 Difference]: Without dead ends: 318 [2018-09-23 21:20:09,721 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 [2018-09-23 21:20:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-09-23 21:20:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2018-09-23 21:20:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-09-23 21:20:09,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 438 transitions. [2018-09-23 21:20:09,729 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 438 transitions. Word has length 308 [2018-09-23 21:20:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:09,729 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 438 transitions. [2018-09-23 21:20:09,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-23 21:20:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 438 transitions. [2018-09-23 21:20:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-09-23 21:20:09,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:09,731 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1] [2018-09-23 21:20:09,731 INFO L423 AbstractCegarLoop]: === Iteration 64 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:09,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:09,731 INFO L82 PathProgramCache]: Analyzing trace with hash 429257856, now seen corresponding path program 62 times [2018-09-23 21:20:09,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:09,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:09,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:09,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:09,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:11,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:11,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:20:11,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:20:11,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:20:11,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:11,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:14,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:14,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 127 [2018-09-23 21:20:14,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-23 21:20:14,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-23 21:20:14,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 21:20:14,927 INFO L87 Difference]: Start difference. First operand 314 states and 438 transitions. Second operand 128 states. [2018-09-23 21:20:15,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:15,910 INFO L93 Difference]: Finished difference Result 325 states and 453 transitions. [2018-09-23 21:20:15,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:20:15,910 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 313 [2018-09-23 21:20:15,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:15,912 INFO L225 Difference]: With dead ends: 325 [2018-09-23 21:20:15,912 INFO L226 Difference]: Without dead ends: 323 [2018-09-23 21:20:15,913 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 [2018-09-23 21:20:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-09-23 21:20:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2018-09-23 21:20:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-09-23 21:20:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2018-09-23 21:20:15,919 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 313 [2018-09-23 21:20:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:15,919 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2018-09-23 21:20:15,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-23 21:20:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2018-09-23 21:20:15,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-23 21:20:15,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:15,921 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1] [2018-09-23 21:20:15,921 INFO L423 AbstractCegarLoop]: === Iteration 65 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:15,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:15,921 INFO L82 PathProgramCache]: Analyzing trace with hash -322639, now seen corresponding path program 63 times [2018-09-23 21:20:15,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:15,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:15,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:15,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:15,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:17,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:17,840 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 [2018-09-23 21:20:17,849 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:20:18,003 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-23 21:20:18,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:18,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:21,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:21,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 129 [2018-09-23 21:20:21,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-23 21:20:21,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-23 21:20:21,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 21:20:21,379 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand 130 states. [2018-09-23 21:20:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:22,367 INFO L93 Difference]: Finished difference Result 330 states and 460 transitions. [2018-09-23 21:20:22,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:20:22,367 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 318 [2018-09-23 21:20:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:22,368 INFO L225 Difference]: With dead ends: 330 [2018-09-23 21:20:22,368 INFO L226 Difference]: Without dead ends: 328 [2018-09-23 21:20:22,369 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 [2018-09-23 21:20:22,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-09-23 21:20:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2018-09-23 21:20:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-09-23 21:20:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 452 transitions. [2018-09-23 21:20:22,375 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 452 transitions. Word has length 318 [2018-09-23 21:20:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:22,375 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 452 transitions. [2018-09-23 21:20:22,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-23 21:20:22,376 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 452 transitions. [2018-09-23 21:20:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-09-23 21:20:22,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:22,377 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1] [2018-09-23 21:20:22,377 INFO L423 AbstractCegarLoop]: === Iteration 66 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:22,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:22,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1970353376, now seen corresponding path program 64 times [2018-09-23 21:20:22,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:22,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:22,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:22,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:22,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:24,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:24,598 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 [2018-09-23 21:20:24,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:20:24,687 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:20:24,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:24,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:27,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:27,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 131 [2018-09-23 21:20:27,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-23 21:20:27,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-23 21:20:27,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 21:20:27,986 INFO L87 Difference]: Start difference. First operand 324 states and 452 transitions. Second operand 132 states. [2018-09-23 21:20:28,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:28,951 INFO L93 Difference]: Finished difference Result 335 states and 467 transitions. [2018-09-23 21:20:28,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:20:28,951 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 323 [2018-09-23 21:20:28,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:28,953 INFO L225 Difference]: With dead ends: 335 [2018-09-23 21:20:28,953 INFO L226 Difference]: Without dead ends: 333 [2018-09-23 21:20:28,954 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 [2018-09-23 21:20:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-09-23 21:20:28,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 329. [2018-09-23 21:20:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-09-23 21:20:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 459 transitions. [2018-09-23 21:20:28,960 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 459 transitions. Word has length 323 [2018-09-23 21:20:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:28,960 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 459 transitions. [2018-09-23 21:20:28,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-23 21:20:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 459 transitions. [2018-09-23 21:20:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-09-23 21:20:28,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:28,962 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1] [2018-09-23 21:20:28,962 INFO L423 AbstractCegarLoop]: === Iteration 67 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:28,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:28,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1474338543, now seen corresponding path program 65 times [2018-09-23 21:20:28,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:28,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:28,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:28,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:28,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:31,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:31,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-23 21:20:31,025 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:31,191 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-23 21:20:31,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:31,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:34,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:34,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-09-23 21:20:34,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-23 21:20:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-23 21:20:34,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 21:20:34,753 INFO L87 Difference]: Start difference. First operand 329 states and 459 transitions. Second operand 134 states. [2018-09-23 21:20:35,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:35,843 INFO L93 Difference]: Finished difference Result 340 states and 474 transitions. [2018-09-23 21:20:35,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:20:35,843 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 328 [2018-09-23 21:20:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:35,844 INFO L225 Difference]: With dead ends: 340 [2018-09-23 21:20:35,845 INFO L226 Difference]: Without dead ends: 338 [2018-09-23 21:20:35,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 21:20:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-09-23 21:20:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2018-09-23 21:20:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2018-09-23 21:20:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 466 transitions. [2018-09-23 21:20:35,852 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 466 transitions. Word has length 328 [2018-09-23 21:20:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:35,852 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 466 transitions. [2018-09-23 21:20:35,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-23 21:20:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 466 transitions. [2018-09-23 21:20:35,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-09-23 21:20:35,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:35,854 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1] [2018-09-23 21:20:35,854 INFO L423 AbstractCegarLoop]: === Iteration 68 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:35,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:35,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1642322368, now seen corresponding path program 66 times [2018-09-23 21:20:35,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:35,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:35,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:35,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:35,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:37,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:37,866 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 [2018-09-23 21:20:37,873 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:20:38,034 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-23 21:20:38,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:38,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:41,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:41,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 135 [2018-09-23 21:20:41,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-23 21:20:41,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-23 21:20:41,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 21:20:41,693 INFO L87 Difference]: Start difference. First operand 334 states and 466 transitions. Second operand 136 states. [2018-09-23 21:20:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:42,664 INFO L93 Difference]: Finished difference Result 345 states and 481 transitions. [2018-09-23 21:20:42,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:20:42,665 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 333 [2018-09-23 21:20:42,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:42,666 INFO L225 Difference]: With dead ends: 345 [2018-09-23 21:20:42,666 INFO L226 Difference]: Without dead ends: 343 [2018-09-23 21:20:42,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 21:20:42,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-09-23 21:20:42,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2018-09-23 21:20:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-09-23 21:20:42,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 473 transitions. [2018-09-23 21:20:42,675 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 473 transitions. Word has length 333 [2018-09-23 21:20:42,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:42,676 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 473 transitions. [2018-09-23 21:20:42,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-23 21:20:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 473 transitions. [2018-09-23 21:20:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-23 21:20:42,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:42,677 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1] [2018-09-23 21:20:42,677 INFO L423 AbstractCegarLoop]: === Iteration 69 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:42,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:42,677 INFO L82 PathProgramCache]: Analyzing trace with hash 315258481, now seen corresponding path program 67 times [2018-09-23 21:20:42,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:42,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:42,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:42,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:42,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:45,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:45,150 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 [2018-09-23 21:20:45,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:45,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:48,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:48,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 137 [2018-09-23 21:20:48,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-23 21:20:48,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-23 21:20:48,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 21:20:48,764 INFO L87 Difference]: Start difference. First operand 339 states and 473 transitions. Second operand 138 states. [2018-09-23 21:20:49,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:49,837 INFO L93 Difference]: Finished difference Result 350 states and 488 transitions. [2018-09-23 21:20:49,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:20:49,837 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 338 [2018-09-23 21:20:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:49,838 INFO L225 Difference]: With dead ends: 350 [2018-09-23 21:20:49,839 INFO L226 Difference]: Without dead ends: 348 [2018-09-23 21:20:49,839 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 [2018-09-23 21:20:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-09-23 21:20:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2018-09-23 21:20:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-09-23 21:20:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 480 transitions. [2018-09-23 21:20:49,845 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 480 transitions. Word has length 338 [2018-09-23 21:20:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:49,845 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 480 transitions. [2018-09-23 21:20:49,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-23 21:20:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 480 transitions. [2018-09-23 21:20:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-09-23 21:20:49,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:49,846 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 1, 1, 1] [2018-09-23 21:20:49,847 INFO L423 AbstractCegarLoop]: === Iteration 70 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:49,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:49,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1672421472, now seen corresponding path program 68 times [2018-09-23 21:20:49,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:49,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:49,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:49,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:49,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:51,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:51,980 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 [2018-09-23 21:20:51,988 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:20:52,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:20:52,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:52,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:55,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:55,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 139 [2018-09-23 21:20:55,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-23 21:20:55,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-23 21:20:55,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 21:20:55,952 INFO L87 Difference]: Start difference. First operand 344 states and 480 transitions. Second operand 140 states. [2018-09-23 21:20:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:57,152 INFO L93 Difference]: Finished difference Result 355 states and 495 transitions. [2018-09-23 21:20:57,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:20:57,153 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 343 [2018-09-23 21:20:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:57,154 INFO L225 Difference]: With dead ends: 355 [2018-09-23 21:20:57,154 INFO L226 Difference]: Without dead ends: 353 [2018-09-23 21:20:57,155 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 [2018-09-23 21:20:57,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2018-09-23 21:20:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 349. [2018-09-23 21:20:57,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-09-23 21:20:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 487 transitions. [2018-09-23 21:20:57,161 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 487 transitions. Word has length 343 [2018-09-23 21:20:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:57,161 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 487 transitions. [2018-09-23 21:20:57,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-23 21:20:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 487 transitions. [2018-09-23 21:20:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-09-23 21:20:57,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:57,163 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 1, 1, 1] [2018-09-23 21:20:57,163 INFO L423 AbstractCegarLoop]: === Iteration 71 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:57,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:57,163 INFO L82 PathProgramCache]: Analyzing trace with hash -64859183, now seen corresponding path program 69 times [2018-09-23 21:20:57,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:57,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:57,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:57,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:57,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:59,778 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:59,778 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 [2018-09-23 21:20:59,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:20:59,959 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-23 21:20:59,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:59,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:03,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:03,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 141 [2018-09-23 21:21:03,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-23 21:21:03,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-23 21:21:03,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 21:21:03,666 INFO L87 Difference]: Start difference. First operand 349 states and 487 transitions. Second operand 142 states. [2018-09-23 21:21:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:04,851 INFO L93 Difference]: Finished difference Result 360 states and 502 transitions. [2018-09-23 21:21:04,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:21:04,852 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 348 [2018-09-23 21:21:04,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:04,853 INFO L225 Difference]: With dead ends: 360 [2018-09-23 21:21:04,853 INFO L226 Difference]: Without dead ends: 358 [2018-09-23 21:21:04,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 21:21:04,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-09-23 21:21:04,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2018-09-23 21:21:04,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-09-23 21:21:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 494 transitions. [2018-09-23 21:21:04,860 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 494 transitions. Word has length 348 [2018-09-23 21:21:04,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:04,861 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 494 transitions. [2018-09-23 21:21:04,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-23 21:21:04,861 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 494 transitions. [2018-09-23 21:21:04,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-09-23 21:21:04,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:04,862 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 1, 1, 1] [2018-09-23 21:21:04,862 INFO L423 AbstractCegarLoop]: === Iteration 72 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:04,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:04,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2072682240, now seen corresponding path program 70 times [2018-09-23 21:21:04,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:04,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:04,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:04,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:04,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:07,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:07,175 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 [2018-09-23 21:21:07,182 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:21:07,270 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:21:07,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:07,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:11,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:11,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 143 [2018-09-23 21:21:11,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-23 21:21:11,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-23 21:21:11,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 21:21:11,542 INFO L87 Difference]: Start difference. First operand 354 states and 494 transitions. Second operand 144 states. [2018-09-23 21:21:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:12,776 INFO L93 Difference]: Finished difference Result 365 states and 509 transitions. [2018-09-23 21:21:12,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 21:21:12,777 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 353 [2018-09-23 21:21:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:12,778 INFO L225 Difference]: With dead ends: 365 [2018-09-23 21:21:12,778 INFO L226 Difference]: Without dead ends: 363 [2018-09-23 21:21:12,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 21:21:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-23 21:21:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 359. [2018-09-23 21:21:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-09-23 21:21:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 501 transitions. [2018-09-23 21:21:12,786 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 501 transitions. Word has length 353 [2018-09-23 21:21:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:12,786 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 501 transitions. [2018-09-23 21:21:12,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-23 21:21:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 501 transitions. [2018-09-23 21:21:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-09-23 21:21:12,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:12,787 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 1, 1, 1] [2018-09-23 21:21:12,788 INFO L423 AbstractCegarLoop]: === Iteration 73 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:12,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:12,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1462961871, now seen corresponding path program 71 times [2018-09-23 21:21:12,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:12,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:12,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:12,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:12,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12496 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:15,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:15,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:15,495 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:21:15,667 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-23 21:21:15,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:15,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-23 21:21:17,226 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-23 21:21:17,427 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:17,428 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:21:17,433 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:21:17,434 INFO L202 PluginConnector]: Adding new model RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:21:17 BoogieIcfgContainer [2018-09-23 21:21:17,434 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:21:17,435 INFO L168 Benchmark]: Toolchain (without parser) took 239228.72 ms. Allocated memory was 1.6 GB in the beginning and 1.8 GB in the end (delta: 243.8 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 192.3 MB). Peak memory consumption was 436.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:21:17,436 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:21:17,437 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.58 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:21:17,437 INFO L168 Benchmark]: Boogie Preprocessor took 24.96 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:21:17,437 INFO L168 Benchmark]: RCFGBuilder took 290.14 ms. Allocated memory is still 1.6 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. [2018-09-23 21:21:17,438 INFO L168 Benchmark]: TraceAbstraction took 238862.01 ms. Allocated memory was 1.6 GB in the beginning and 1.8 GB in the end (delta: 243.8 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 171.2 MB). Peak memory consumption was 415.0 MB. Max. memory is 7.1 GB. [2018-09-23 21:21:17,440 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 0.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.58 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.96 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 290.14 ms. Allocated memory is still 1.6 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 238862.01 ms. Allocated memory was 1.6 GB in the beginning and 1.8 GB in the end (delta: 243.8 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 171.2 MB). Peak memory consumption was 415.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 39]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 39). Cancelled while BasicCegarLoop was analyzing trace of length 359 with TraceHistMax 71, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 119 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 238.7s OverallTime, 73 OverallIterations, 71 TraceHistogramMax, 32.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 589 SDtfs, 29245 SDslu, 21520 SDs, 0 SdLazy, 10196 SolverSat, 199 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15194 GetRequests, 10082 SyntacticMatches, 0 SemanticMatches, 5112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238560 ImplicationChecksByTransitivity, 170.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=359occurred in iteration=72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 72 MinimizatonAttempts, 284 StatesRemovedByMinimization, 71 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 189.1s InterpolantComputationTime, 25280 NumberOfCodeBlocks, 25280 NumberOfCodeBlocksAsserted, 1379 NumberOfCheckSat, 25138 ConstructedInterpolants, 12495 QuantifiedInterpolants, 56213688 SizeOfPredicates, 2695 NumberOfNonLiveVariables, 23485 ConjunctsInSsa, 5250 ConjunctsInUnsatCore, 142 InterpolantComputations, 2 PerfectInterpolantSequences, 1/576521 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/RailwayCrossing.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-21-17-450.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/RailwayCrossing.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-21-17-450.csv Completed graceful shutdown